首页英语词典aa的意思

a

英 [ə; eɪ] 美[e]

英英释义考试真题实用场景例句

n. 字母A；第一流的；学业成绩达最高标准的评价符号
abbr. [物]安（ampere）

CET4CET6高频词基本词汇

中文词源

a 一 (个)

不定冠词an在发展过程中出现的缩略形式，应用于首字母为辅音的单词及h发音单词。

英英释意

1. the blood group whose red cells carry the A antigen

2. a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

3. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

4. one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

5. (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

6. the basic unit of electric current adopted under the Systeme International d'Unites;: "a typical household circuit carries 15 to 50 amps"

7. the 1st letter of the Roman alphabet

英文词源

a: a: [OE] The indefinite article in English is ultimately identical with the word one (as is the case, even more obviously, in other European languages – French un, German ein, and so on). The ancestor of both a(n) and one was ān, with a long vowel, but in the Old English period it was chiefly used for the numeral; where we would use a(n), the Anglo-Saxons tended not to use an article at all. Ān begins to emerge as the indefinite article in the middle of the 12th century, and it was not long before, in that relatively unemphatic linguistic environment, its vowel became weakened and shortened, giving an.

And at about the same time the distinction between an and a began to develop, although this was a slow process; until 1300 an was still often used before consonants, and right up to 1600 and beyond it was common before all words beginning with h, such as house.
=> one
a (1): indefinite article, mid-12c., a variation of Old English an (see an) in which the -n- began to disappear before consonants, a process mostly complete by mid-14c. The -n- also was retained before words beginning with a sounded -h- until c. 1600; it still is retained by many writers before unaccented syllables in h- or (e)u-, but is now no longer normally spoken as such. The -n- also lingered (especially in southern England dialect) before -w- and -y- through 15c.
a (2): as in twice a day, etc., from Old English an "on," in this case "on each." The sense was extended from time to measure, price, place, etc. The habit of tacking a onto a gerund (as in a-hunting we will go) died out 18c.

考试真题

After financial disasters family members also tend to do whatever they can to help each other and their communities, A 1940 book.

why must we learn to identify the risks we are going to take?

For many families the recession means more than not booking a holiday A You Gov poll of 2, 000 people found 22% said they were arguing more with their partners because of concerns about money

Caught in the Web A few months ago, it wasn't unusual for 47-year-old Carla Toebe to spend 15 hours per day online

"Pleasure" is not a dirty word.

"A balanced breakfast is really helpful, but getting regular meals throughout the day is more important to leave blood sugar stable through the day, which helps control weight and hunger levels," says Elder.

"A well-displayed meal is enhanced one hundred percent in my eyes," he later wrote in one of his cook books.

"Antarctica creates a hostile environment," says the operation director for the British Antarctic Survey.

"As what happened with tobacco, this will require a cultural shift, but that can happen," says Nguyen. "In the same way physicians used to smoke, and then stopped smoking and were able to talk to patients about it,I think physicians can have a bigger voic

"Being taller is associated with longer life expectancy," he said, "This is largely due to a lower risk of dying of cardiovascular (心血管的) disease among taller people."

"Chauncy is a top student who is doing his best to make it in a world with no money and very few resources," White explained on the crowd-funding site.

"Gamification is about understanding what it is that makes games engaging and what game designers do to create a great experience in games, and taking those learnings and applying them to other contexts such as the workplace and education," explains Kevin

"highly superior autobiographical memory" or HSAM for short, first came to light in the early 2000s, with a young woman named jill Price.

"I am a visionary." he says.

"I followed my route like I normally do," Smith told a reporter.

"I have been bothered for a long time about the curious lack of curiosity,"said a Democratic member of the New Jersey legislature back in July, referring to an insufficiently inquiring attitude on the part of an assistant to New Jersey Governor Chris Chri

"I prefer take home essays because it is then really about the writing, so you have time to edit and do more research," says Elizabeth Dresser, a junior at Barnard.

"I think we're unique as a federal agency," USPS official Mike Swigart told me, "because we're in literally every community in this country."

"If we are designing for engineers, I'm not talking about a "game" at all," Cornetti says.

"In fact, there is almost no hard evidence for midlife crisis other than a few small pilot studies conducted decades ago," Barbara Hagerty writes in her new book, life Reimagined.

"It actually had a very negative effect on morale and performance," Werbach says.

"It is a thing of no great difficulty," according to Plutarch," to raise objections against another man's speech, it is a very easy matter; but to produce a better in its place is a work extremely troublesome."

"It's an important, cautionary note that we shouldn't get too carried away with the idea that a computer system can replace doctors and therapists," says Christopher Dowrick, a professor of primary medical care at the University of liverpool.

"It's been postponed until 2017," says Anna Somers, the founder and CEO of The Art Newspaper and the former head of Venice in Peril, a group devoted to restoring Venetian art.

"It's been postponed until 2018," says Anna Somers, the founder and CEO of The Art Newspaper and the former head of Venice in Peril, a group devoted to restoring Venetian art.

"Just because I have a business relationship with an individual and I can profit from that relationship, it does not necessarily mean that this person is my friend," Soupios says.

"Looking at studies that tested concentration, the number of studies showing a benefit was exactly the same as the number that found no benefit," she says.

"Meals are the foundation of the family," says Carole Counihan, a professor at millersville University in Pennsylvania, "so there was a very important interconnection between eating together and strengthening family ties."

"My memory is like a library of video tapes, walk-throughs of every day of my life from waking to sleeping," he explains.

"One of the reasons I find this topic very interesting is because my mom was a smoker when I was younger," says lindson-Hawley, who studies tobacco and health at the University of Oxford.

"Say, you know, this is the best student I've ever had," says Kuheli Dutt, a social scientist and diversity officer at Columbia University's Lamont campus. "Compare those excellent letters with a merely good letter: 'The candidate was productive, or intel

"Strength, softness and thickness remain the leading indicators of toilet paper quality, with just a small proportion of consumers preferring more luxurious alternatives, such as those with flower patterns or perfume," said mintel analyst Jack Duckett.

"The body uses a lot of energy stores for growth and repair through the night," explains diet specialist Sarah Elder.

"The fact that participants were willing to substitute part of a food item for the mere prospect of a relatively small monetary award is interesting," says Reimann.

"The link between sleep and health, and bad sleep and disease is becoming clearer and clearer," says Lawrence Epstein, a sleep expert at Harvard University.

"The move to recapture a small part of the profits from an industry that pushes a product that contributes to diabetes, obesity and heart disease in poorer communities in order to reinvest in those communities will sure be inspirational to many other plac

"There are a lot of studies on the relationship between breakfast eating and possible health outcomes, but this may be because those who eat breakfast choose to habitually have health-enhancing behaviours such as regular exercise and not smoking," she say

"There's a mountain of evidence 34 proving the importance of sex influences at all levels of brain function," he told The Seattle times.

"There's an ancient legend that as long as these eggs are made, evil will not prevail in the world," says Joan Brander, a Canadian egg-painter who has been painting eggs for over 60 years, having learned the art from her Ukrainian relatives.

"These patterns suggest that some types of mental flexibility decrease relatively early in adulthood, but that the amount of knowledge one has, and the effectiveness of integrating it with one's abilities, may increase throughout all of adulthood if there

"This finding supported ConAgra's decision to position the product against other high quality frozen dinners, rather than as a diet or health food.

"This is Hesiod, of course, a younger contemporary poet, we believe, with Homer," Soupios says.

"We are at a point where in much of the developed world the vast majority of young people grew up playing video games, and an increasingly high percentage of adults play these video games too," Werbach says.

"We realize that as a company with people, trucks, warehouses, we needed to play a larger role," said Eduardo Martinez, the president of the UPS Foundation.

"What makes a game game-like is that the player actually cares about the outcome," Werbach says.

"When you're emotionally vulnerable, you're even more in need of a caring human being," he says.

"You suspended Ray rice after our video," a reporter from TMZ challenged National Football League Commissioner Roger Goodell the other day.

"You would want that robot preloaded with a good set of values," said Russell.

A 16th century castle in Scotland is close to collapsing after lumps of soil were washed away by floods, threatening its foundations.

A 16-year-old asked a stranger at a grocery store to buy him and his mother some food in exchange for carrying the man's groceries to his car.

A 2009 University of British Columbia study of women with an eating disorder who were taught to knit found that learning the craft led to significant improvements.

A 2016 review of 10 studies looking into the relationship between breakfast and weight management concluded there is "limited evidence" supporting or refuting (反驳) the argument that breakfast influences weight or food intake, and more evidence is required

A 20-year-old junior at Georgia Southern University told BuzzFeed News that she normally spends $500-600 on access codes for class.

A 4-year-old may 27 protest that a sister has more fruit juice when it is only the shapes of the glasses that differ, not the 28 amount of juice.

A 9-year-old girl in New Mexico has raised more than $500 for her little brother who needs heart surgery in Houston,Texas this July.

A bridge with big, light-blue loops leads into the business district.

A business professor says that a future city should have easy access to international transportation.

A California television station in Fresno reported Tuesday that James Savage set a record as the youngest swimmer to make the journey to the former prison.

A child's ability to become deeply absorbed in something, and derive intense pleasure from that absorption, is something adults spend the rest of their lives trying to return to.

A commentary in the Shanghai Daily points out that innovation doesn't mean piles of documents.

A company should find ways to innovate not just in products but also in functions, business models and processes.

A couple of recent papers have finally opened a window on these people's extraordinary minds.

A decorated egg thrown into the field would be a wish for a good harvest.

A decorated egg with a bird on it, given to a young married couple, is a wish for children.

A dedicated USPS employee was on the job carrying out duties in spite of extreme conditions.

A different interpretation is possible when the actual amount of information acquired by the user is taken into account.

A drop in oxygen pressure can cause headaches in certain individuals.

A drug is a chemical substance.

A drug user is the person who takes the drug.

A dry mouth may reduce taste sensitivity, but taste is restored by drinking fluids.

A face-to-face communications is the most intimate.

A few additional roads would come later.

A few minutes later, the pressured strokes started to produce a relieving effect and my body and mind began to sink deeper into relaxation.

A few months ago, I was down with a terrible cold which ended in a persistent bad cough.

A fixed mind-set can also hinder communication and progress in the workplace and discourage or ignore constructive criticism and advice.

A fourth of this year's U.S. grain harvest will go to fuel cars.

A freshman textbook will have dozens of contributors, from subject-matter experts through graphic and layout artists to expert reviewers and classroom testers.

A friend recently took her mother to visit an expensive assisted living / nursing home near my town.

A friend told me the following story.

A gamification strategy that is not sufficiently thought through or well tailored to its players may engage people for a little while, but it will not motivate people in the long term.

A golden or lucky birthday is when one turns the age of their birth date.

A good rule of thumb is that as soon as generals and hospital administrators jump on a management bandwagon (追随—种管理潮流), it is time to ask questions.

A good system is one that keeps that worst-case setting as improbable as possible while also offering strong protection in the event of a less-extraordinary attack.

A letter written by Charles Darwin in 1875 has been returned to the Smithsonian Institution (档案馆) by the FBI after being stolen twice.

A little extra height brings a number of advantages, says Elio riboli of Imperial College.

A local radio said an unspecified number of people were rescued, including the tour boat's owner hilario Blandon.

A longer lifespan is changing the narrative structure of life itself.

A lot has changed since we were last in school.

A maker space is a place which can be in a school, but it doesn't look like a classroom.

A man called Naddodd was on his way from Norway to the Faroe Islands, north of England, when his ship was caught in a storm.

A man described as a "non-worker civilian" was buried up to his waist in the basement.

A man from Libya was enjoying a walk along the sands at southport beach.

A message in a bottle sent out to sea by a New Hampshire man more than five decades ago was found 1500 miles away and has been returned to his daughter.

A Moon Express representative declined to comment on the story, but noted that the company is very optimistic about its proposal.

A multi-stage life will have profound changes not just in how you manage your career, but also in your approach to life.

A new batch of young women—members of the so-called millennial (千禧的) generation—has been entering the workforce for the past decade.

A New Jersey black bear that walks upright on its two back legs and has become a social media darling has re- emerged and has been captured on video months after its last sighting.

A new Peabody study of the Tennessee Voluntary Pre-K program reports that pre-K works, but the gains are not sustained through the third grade.

A new species of snake has been discovered on a remote island in the Bahamas.

A new study challenges that belief, questioning whether brains really can be distinguished by gender.

"A comparison point is in the 1990s battles over encryption," said Kurt Opsahl, general counsel of the Electronic Frontier Foundation, a privacy watchdog group.

"About 80% of our company's year-over-year declines in comparable sales can be attributed to shortfalls (短缺) in cold-weather goods," said chief executive Terry Lundgren in a press release.

"About once a week, I have a client that will bring up a new certification I've never even heard of and I'm in this industry," said Kevin wilhelm, chief executive officer of Sustainable Business Consulting.

"An ultimate face recognition algorithm should perform with billions of people in a dataset," the researchers wrote.

"And yet that happens every day in the video game world," Farley told reporters during a press conference Friday. "I was a main character in Fallout 4, a character by the name of Kellogg, and I never knew that I was doing vocal recording for that game thr

"As advocates of children's rights, we believe that children should have a voice about what information is shared about them if possible," says Stacey Steinberg, a legal skills professor at the University of Florida Levin College of Law in Gainesville.

"Everybody has a scary story about someone getting scooped." says New York University astronomer David Hogg.

"I think it's a terrific idea," she says of the campaign.

"If they are anywhere near worth their salt as engineers, I bet they are rethinking their threat model as we speak," said Jonathan Zdziarski, a digital expert who studies the iPhone and its vulnerabilities.

"If we can help to direct students to more of these types of campuses and help students to understand them to be realistic and accessible places, have them apply to these schools at greater frequency and ultimately get in and enroll, we are going to raise

"If you look at a lot of low-income communities in the United States, there are programs that are serving them, but they're primarily centered around ‘Let's get these kids' grades up,' and not around ‘Let's get these kids access to the same kinds of oppor

"If you make clinical predictions based on somebody's race, you're going to be wrong a good chunk of the time," Yudell told live Science.

"In America there are large ants which can eat whole trees bare as a broom handle in a single night,"she wrote in the description.

"In theory," says Vallentine, "this can create a high enough temperature to generate super-heated steam.

"Increased inequality and decreasing mobility pose a fundamental threat to the American Dream," he said.

"It's a very small number of games that would trigger this secondary compensation issue," said voice actor Crispin Freeman, who's a member of the union's negotiating committee.

"It's a very small number of games that would trigger this secondary compensation issue," said voice actor Crispin Freeman, who's a member of the union's negotiating committee. "This is an important aspect of what it means to be freelance (从事自由职业的) perfor

"It's been the year of interactive television advertising for the last ten or twelve years", says Colin dixon of a digital-media consultancy.

"It's not only the selective and elite institutions that provide those opportunities for a small subset of this population," Rubinoff said, adding that a majority of first-generation undergraduates tend toward options such as online programs, two-year col

"I've had more feedback in a passive approach," he says.

"Many students are coming from a situation where no one around them has the experience of successfully completing higher education, so they are coming in questioning themselves and their college worthiness," Jarrat continued.

"One of the ways in which all agents seem to make decisions is that they assign a lower weighting to outcomes that are going to be further away in the future," he says.

"Our support structure was more like: ‘ You are going to get through Yale; you are going to do well, '" he said, hinting at mentors, staff, and professors who all provided significant support for students who lacked confidence about " belonging" at such a

"Overly strict standards often fail," James Bartram, a WHO water-health expert, said.

"Playing pool, playing cards, having dinner, having lunch," all work better "than going though a survey of questions.

"Presumably it's because it's simple and easy to write a prescription and consider a patient case closed rather than investigate further," Polman says.

"She was a scientist on the level with a lot of people we spend a lot of time talking about," said Kay Etheridge, a biologist at Gettysburg College in Pennsylvania who has been studying the scientific history of Merian's work. "She didn't do as much to ch

"Snapping a photo directs attention, which heightens the pleasure you get from whatever you're looking at," Dehl says.

"The creation of a system of marine protected areas is a key part of ongoing scientific and policy discussions in CCAMLR," he added.

"The project has two sides," says Xavier Serrat, Neurice project manager and researcher at the University of Barcelona,"the short-term fight against the snail, and a mid- to long-term fight against climate change.

"The protection and improvement of the human environment is a major issue which affects the well-being of peoples and economic development throughout the world," read the final declaration from this gathering, the first of a sequence which would lead to t

"The thing you are searching for is reputation," says titus Brown, a genomics (基因组学) researcher at the University of California,Davis.

"The typical American diet is a lot higher in protein than a lot of us think," says registered dietitian Angela Pipitone.

"The yield is never going to be high," Farrant says, so these plants will be targeted not at Iowa farmers trying to squeeze more cash out of high-yield fields, but subsistence farmers who need help to survive a drought like the present one in South Africa

"There is a large potential for waste water agriculture to both help and hurt great numbers of urban consumers," said liqa Raschid-Sally, who led the study.

"There is a lot of support at Yale, to an extent, after a while, there is too much support," he said, half-joking about the countless resources available at the school.

"There wasn't really a college-bound culture at my high school," she said.

"They provide a useful service," said Flack.

"They underestimate themselves when selecting a university," said Dave Jarrat, a marketing executive for Inside Track, a for-profit organization that specializes in coaching low-income students and supporting colleges in order to help students thrive.

"They were able to walk fester, had improved balance, and were also able to get up out of a chair faster than the control group," Starr says.

"This is really about trying to cut through the confusion that consumers have when they are buying a product and that businesses have when they are selling a product," said Jon Leibowitz, chairman of the commission.

"Using existing civil society structures or networks is a more effective way of creating change...and obviously trade unions are one of the biggest civil society networks in the UK," he says.

"We as a society need to understand that, when we don't punish lying, we increase the probability it will happen again," Ariely says.

"We do weather monitoring here and other research."ning Xu, 53, the chief of the Chinese base, said over tea during a fierce blizzard (暴风雪) in late November.

"We're obligated to keep a pulse on the population for at least five years after the foxes are delisted," says Boser.

"When people experience decision fatigue—when they are tired of making choices—they have a tendency to choose to go with the status quo 现状," he says.

"When we can't actually remove the source of our fear, we tend to adapt psychologically by adopting a range of defence mechanisms," says Tom Crompton, change strategist for the environmental organisation World wide Fund for Nature.

"with my institution and teaching load,I don't have postdocs and grad students," says Terry McGlynn, a tropical biologist at California State University, Dominguez hills.

"You're what you eat and drink, and that's recorded in your hair,"said Thure Cerling, a geologist at the University of Utah.

4 million working days were lost to work related stress last year, a jump of nearly a quarter.

40Currently, Patagonia repairs about 40,000 garments a year in their Reno, Nevada, service center.

5 million worth of young Bison that will be raised according to its grass-fed protocols, with a guaranteed purchase price.

71% of parents with a college degree say they do it every day, compared with 33% of those with a high school diploma or less.

A 2001 study cataloged all the ways in which the term " Black " carried connotations 涵义 that were more negative than those of " African American. "

A 2016 study found that users had a "consistently positive attitude" about the giraff robot's ability to enhance communication and decrease feelings of loneliness.

A bathing machine was rolled down to the sea shore, so women would not be seen in swimwear.

A battery-powered world comes with its own risks, too.

A billion people are living in slums, not the same billion people, but there is some overlap.

A bonus with the "keep-moving principle" is that while we keep moving, we don't have a chance to worry?

A bystander named John Roulstone wrote a poem about the event, then, at some point, Hale herself seems to have helped write it.

A car that takes off from London street and lands in another random street is unlikely to happen," says Prof.

A case can be made that rich nations export environmental problems, the most graphic example being climate change.

A century's worth of calculated name changes point to the fact that naming any group is a politically freighted exercise .

A CFL cannot be simply installed in an incandescent fixture and then expected to produce a visual appearance that is more than washed out, foggy, and dim.

A decade ago, this island's ecosystem was in chaos.

A drone (遥控飞行器) operator will invade someone's privacy.

A few psychology journals have created incentives to increase interest in reproducible science—for example,by affixing an ‘open-data' badge to articles that clearly state where data are available.

A few weeks after this positive dress rehearsal, the young lawyer did win.

A few years later, a large defense buildup finally provided a fiscal stimulus adequate to the economy's needs—and suddenly industry was eager to employ those "unadaptable and untrained" workers.

A finding that was a bit surprising is that to consumers, the inner parts of high-tech devices do apparently matter.

A flagship university in the South, the school graduates just 16 percent of its first-generation students, despite its overall graduation rate of 71 percent.

A further reduction in local supplies is yet another unwelcome setback to the industry.

A global campaign has been launched to create a network of ocean sanctuaries to protect the seas in the region and Greenpeace is calling for an immediate halt to fishing in areas being considered for sanctuary status.

A global campaign has been launched to turn a huge tract of Antarctic seas into ocean sanctuaries, protecting wildlife and banning not just krill fishing, but all fishing.

A group of individuals is not automatically a team.

A handful of lawsuits have been filed in recent years against companies accused of using misleading environmental labels.

A high-tech test that can tell when a person is not telling the truth sounds too good to be true.

A huge portion of our lives involves the surrender of our freedom and personal autonomy.

A job application might mention affiliations with groups such as the "Wisconsin Association of African-American Lawyers" or the "National Black Employees Association," the names of which apparently have consequences, and are also beyond their members' con

A lot of clever people are terrified about artificial intelligence, fearing that robots will one day become so smart that they'll murder all of us.

A lot of people believe that working at a magazine is a glamorous job.

A lot of people liked my photos and started asking me for travel tips.

A lot of the government advertising has been about individual responsibility, but actually understanding that drinking is very much about the social activity and finding ways to help young people get home safely and not end up in hospital is one of the th

A lot of times people are not really aware of the impact they have, or the fact that taking them in combination with other medications might put you at increased risk for something that you wouldn't otherwise being countering or be at risk for.

A low wage for elementary school teachers, however, doesn't mean elementary education isn't important.

A machine can read millions of essay within minutes.

A mere generation ago, parent-child relations were described as "the generation gap".

A new effort led by Canoe Ventures, a coalition of leading cable providers, aims to make interactive advertising available across America later this year.

A new study from michigan State University, though, argues that all students—including high achievers—see a decline in performance when they browse the Internet during class for non-academic purposes.

A new study has failed to find any conclusive evidence that lifestyle changes can prevent cognitive decline in older adults.

A New York city-based nonprofit called Bridge to Enter Mathematics runs a residential summer program aimed at getting underserved students, mostly black and hispanic, working toward math and science careers.

A nice video published online last month sheds light on expertise and the conscious mind.

A number of pioneers from the technology industry, most famously the entrepreneur Elon Musk, have also expressed their concerns about the damage that a super-intelligent AI could do to humanity.

A number of prominent economists have also argued that it's harder for the poor to climb the economic ladder today because the rungs (横档) in that ladder have grown farther apart.

A person shouldn't buy an insurance protection that really isn't necessary.

A person, for example, who is allergic to cats would probably never become an animal doctor.

A previous study noted that dolphins always 34 consciously control their breathing.

A quarter of students report that their use of digital devices during class causes their grades to suffer .

A recent International Labour Organization report says the deterioration of real wages around the world calls into question the true extent of an economic recovery, especially if government rescue packages are phased out too early.

A recent study graded more than 600 internet retailers on how easy it was for consumers to shop, buy, and pay.

"I thought it would be useful for him to learn Chinese at an early age" Joseph Stocke, the managing director of a company, says of his 2-year old son.

"Staying with a native speaker is better for children than simply sitting in a classroom, " says Suzanne Flynn, a professor in language education of children.

As you make reading a regular part of your life, you'll make more connections, stay more focused and understand the text better.

It is wise to take a day off to rest.

A 90-year-old has been awarded "woman of the year" for being Britain's oldest full-time employee-still working 40 hours a week.

A baby's play is nothing more than a game.

A bar graph has two axes and uses bars to show amounts.

A better plan for sleep can help.

A birdwatcher, armed with a telescope, found the pet sitting desperately on a rock.

A boy on a bike caught my attention.

A build-it-yourself solar still is one of the best ways to obtain drinking water in areas where the liquid is not readily available.

A California builder designed the structure of its houses smartly.

A cat's mom also brings home things to her children to help them practice hunting.

A century ago, the resource in question was oil.

A child's day is filled with fascination, newness and wonder.

A chimpanzee can't win an argument with a modern man, but it can tear the man apart like a rag doll.

A city is the product of the human hand and mind, reflecting man's intelligence and creativity.

A coach may read a sports story for its threat value: he may have to play that team next week.

A code uses symbols to replace words, phrases, or sentences.

A coin is put into the cake, which signifies 预示 success in the new year for the person who receives it.

A college classmate of mine, tim, was an excellent football player, even though he weighed much less than the average player.

A common memory they all have of their school days is the school uniform.

A company showed a new voice technology able to produce such a convincing human-sounding voice that it was able to speak to a receptionist.

A computer analysis blindly compared calls produced by mothers and chicks, ranking them by similarity.

A cousin to the watched-pot wait is the forced wait.

A cup of coffee costs about three dollars and fifty cents, but the fun is free.

A decade of data breaches (数据侵入) of personal information has led to a situation where scammers can easily learn your mother's name, and far more.

A desk dictionary is medium-sized, generally containing over 170, 000 entries as well as extra features.

A desktop computer, screen, projector, and loudspeakers will be available.

A disaster can change everything in life.

A dog's eating habit requires regular training before it is properly established.

A few daring survived, though, along with a few stay-in-the-cave types.

A few hours before, I'd been at home in Hong gonk, with its choking smog.

A few students hesitated to start.

A few times each year, an inspector arrived to look over the entire light station.

A free schedule of events for each term is available by calling the box office at 556-4183.

A friend in need is a friend indeed.

A friend of mine owns an area of land in western victoria.

A good first impression increases sales.

A good neighbor is also one who likes to help out in small ways.

A graph gives the reader a picture to interpret.

A grasp of how to manage color in your spaces is one of the first steps to creating rooms you'll love to live in.

A great American, James Madison, referred to: "the capacity of mankind for self-government."

A great decline in young work force is likely to occur in China, for instance.

A group of people sitting in the hall stopped talking and stared at us.

A heavy rain ruined the dinner.

A home environment in blue can help people reduce food intake.

A housekeeper is to clean up the kitchen.

A kind of "green thinking " has become part of practices.

A kitemark scheme would be workable on a nationwide scale.

A latest study on the college job market showed that employers wanted to hire 22% fewer graduates this year than last.

A legend, also called a key, is a guide to the symbols and colors used in the graph.

A line graph looks similar to a bar graph, but instead of bars, it plots points and connects them with a line.

A list of references must be included.

A listener in China, Wang ming, who is about to get an engineering degree, wants to know how American college graduates find jobs.

A little time planning ahead can save a lot of work later on.

A local driving school has also offered him six free driving lessons.

A local farmer told them the dog sounded like one advertised as lost in the local paper.

A lot of business is still done over the phone, and much of it is based on trust and existing relationships.

A lunchtime escape allows her to keep a boss from tapping her on the shoulder.

A machine with a specific purpose has another quality, one that we usually associate with living things: a wish to preserve its own existence.

A man owes his success to his family support.

A man should learn suitable ways to deal with life.

A man should try to satisfy people around him.

A man was free if he was self-controlled.

A month before my first marathon, one of my ankles was injured and this meant not running for two weeks, leaving me only two weeks to train.

A month before the marathon, the author made up his mind to run.

A multi-year drought (干旱) in south-east Brazil is becoming worse.

A musher named Kaasen had to brave this storm.

A neighborhood girl had bought a new bike.

A neighborhood girl I'd played with millions of times appeared with the exact same basket fixed to her shiny, new bike that already had all the bells and whistles.

A new collection of photos brings an unsuccessful antArctic voyage back to life.

A new commodity brings about a highly profitable, fast-growing industry, urging antitrust反垄断regulators to step in to check those who control its flow.

A new report found 46 percent of meals are eaten alone in America.

A nurse who understands the healing (治愈) value of silence can use this understanding to assist in the care of patients from their own and from other cultures.

A person's accent reflects his class.

A photography exhibition held by Han Media to celebrate its founding in New York city on April 24, featuring three emerging Chinese photographers; yingxi Michael Shi, Haiyin lin and liming Guan, whose works have appeared in publications such as Vogue.

A pie graph might include a legend, or it might use icons or labels within each slice.

A politician may read an account of his latest successful public meeting, not for its delayed reward, but very much as his wife reads an account of a party.

"Carry a book with you at all times" can actually work, too-providing you dip in often enough, so that reading becomes the default state from which you temporarily surface to take care of business, before dropping back down.

"Hooray! At last!" wrote Anthony Tommasini, a sober-sided classical-music critic.

"Hugging protects people who are under stress from the increased risk for colds that's usually associated with stress," notes Sheldon Cohen, a professor of psychology at Carnegie.

"I wouldn't pick a year to end print," he said.

"Idleness is not just a vacation, an indulgence or a vice; It is as indispensable to be brain as vitamin D is to the body...[idleness] is, paradoxically, necessary to getting any work done," he argues.

"It was seen as a blunder," he said.

"It's a really hard thing to do and it's a tremendous luxury that BuzzFeed doesn't have a legacy business," Peretti remarked.

"It's already a huge problem from a public expenditure perspective for the whole country," he says.

"Many jobs are boring, degrading, unhealthy, and a waste of human potential," says John Danaher, a lecturer at the National University of Ireland in Galway.

"Many young people assume a great deal of personal responsibility for educating themselves and actively seeking out opposing viewpoints," the survey concluded.

"Mass produced clothing, like fast food, fills a hunger and need, yet is non-durable and wasteful," Cline argues.

"My father was an RAF pilot and my cousin the skipper of a Lancaster lost over Berlin," he adds.

"Once on the calendar I protect this time like I would a doctor's appointment or important meeting", he writes.

"Our products succeed when they become part of daily or weekly patterns," said Carol Berning, a consumer psychologist who recently retired from Procter and Gamble, the company that sold $76 billion of tide, Crest and other products last year.

"Speaking with your children before you make a real estate decision is wise, but I wouldn't base the purchasing decision solely on their opinions." Hampson said.

"The first thing needed for innovation is a fascination with wonder," says Dawna Markova, author of "The Open mind".

"The gap is between the jobs that take no skills and those that require a lot of skill,” says Rob Spohr, a business professor at Montcalm Community College.

"The lesser prairie chicken is in a desperate situation," said USFWS director Daniel Ashe.

"There has been a kind of revival or a rethinking about what guilt is and what role guilt can serve," says Amrisha Vaish, a psychology researcher at the University of virginia, adding that this revival is part of a larger recognition that emotions aren't

"There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Trey Duster, a New York University sociologist.

"There seems to be a predominance of short-term thinking at the expense of long-term investing," said Commissioner Daniel Gallagher of the US Securities and Exchange Commission in speech this week.

"They blame it on the manufacturing recession," says birgit Klohs, chief executive of The right Place, a business development agency for western michigan.

"They're harder to find and they have job offers," says Jay Dunwell, president of Wolverine Coil Spring, a family owned firm.

"This indicates there is a real personal responsibility in counteracting this problem," says Roxanne Stone, editor in chief at Barna Group.

"We estimate that either eliminating a substantial labour-rights concern, such as child labour, or increasing corporate giving by about 20% results in fines that generally are 40% lower than the typical punishment for bribing foreign officials," says one

"We'd assumed we'd have to give it a moving head and tail, facial features, and put a scene on it to make it smell like a real rat, but that wasn't necessary," says Janet wiles at the University of Queensland in Australia, who helped with the research.

"When Dr.Epley and Mr.Schoreder asked other people in the same train station to predict how they would feel after talking to a stranger, the commuters thought their ride would be more pleasant if they sat on their own," the New York times summarizes.

"When I come home from a hard day's work, I often feel tired," Danaher says, adding,"In a world in which I don't have to work, I might feel rather different" - perhaps different enough to throw himself into a hobby or a passion project with the intensity

"Whenever decisions are based on masses of data, you quickly get into a lot of ethical questions," notes Tan kiat How, chief executive of a singapore-based agency that is helping the government develop a voluntary code for the ethical use of ai.

A "southern"camp headed by French wants something different: "European economic government" within an inner core of euro-zone members.

A "town of culture" could be not just about the arts but about honoring a town's peculiarities-helping sustain its high street, supporting local facilities and above all celebrating its people and turn it into action.

A 2014 survey conducted in Australia, Britain, and the United States by the University of Wisconsin-Madison found that young people's reliance on social media led to greater political engagement.

A badly run "year of culture" washes in and out of a place like the tide, bringing prominence for a spell but leaving no lasting benefits to the community.

A calm, rule-following child might respond better to a different sort of parenting than, for example, a younger sibling.

A Canadian study found that children as young as 14 months can differentiate between a credible person and a dishonest one.

A century ago, few people regularly brushed their teeth multiple times a day.

A century ago, the immigrants from across the Atlantic included settlers and sojourners.

A couple of Christmases ago, my youngest stepdaughter, who was 9 years old at the time, got a Superman T-shirt for Christmas.

A cynic might speculate that the UK is on the verge of disappearing into an endless fever of self-celebration in its desperation to reinvent itself for the post-Brexit world: after town of culture, who knows that will follow-village of culture?

A deal is a deal-except, apparently,when Entergy is involved.

A Department of Health spokesperson said: "We need to create a new vision for public health where all of society works together to get healthy and live longer."

A different and not mutually exclusive prediction holds that the future will be a wasteland of a different sort, one characterized by purposelessness": without jobs to give their lives meaning, people will simply become lazy and depressed.

A federal appeals court overturned the prior decision, ruling that Myriad Genetics could indeed hold patents to two genes that help forecast a woman's risk of breast cancer.

A few decades ago, many people didn't drink water outside of a meal.

A few wealthy people will own all the capital, and the masses will struggle in an impoverished wasteland.

A further concern is that the use of electronic means of payment leaves an electronic trail that contains a large amount of personal data.

A group of labour MPs, among them Yvette Cooper, are bringing in the new year with a call to institute a UK "town of culture" award.

A growing number of researchers and organisations are now thinking seriously about that question.

A growing number seem to agree.

A Harvard Business School study found that observers consistently rated those who were frank about themselves more highly, while those who hid lost trustworthiness.

A judge has now overruled the city's decision to stop levying fines, ordering them reinstated.

A Knight Foundation focus-group survey of young people between ages 14 and 24 found they use "distributed trust" to verify stories.

A lack of formal education, however, doesn't constrain the ability of the developing world's workforce to substantially improve productivity for the foreseeable future.

A large part of evaluation is calling out bad arguments, but we also need to admit good arguments by opponents and to apply the same critical standards to ourselves.

A long struggle will be needed to avoid a future of digital feudalism.

A moralist, satirist, and social reformer Dickens crafted complex plots and striking characters that capture the panorama of English society.

A more practical goal is to try, to the best of your ability, to be as tolerant and composed as you can when faced with trying situations involving your children.

A new study suggests that contrary to most surveys, people are actually more stressed at home than at work.

A new survey by Harvard University finds more than two-thirds of young Americans disapprove of President Trump's use of Twitter.

A number of studies have concluded that normal-weight people are in fact at higher risk of some diseases compared to those who are overweight.

A pair of bills sponsored by Massachusetts state Senator Jason Lewis and House Speaker Pro Tempore Patricia Haddad, to ensure "gender parity" on boards and commissions, provide a case in point.

A passenger peering out of the window might not even see the other planes.

A quarter of America's public-sector workers have a university degree.

A recent annual study of countries and their ability to convert growth into well-being sheds some light on that question.

A recent paper, titled "The Natural Selection of Bad Science", published on the Royal Society's open science website, attempts to answer this intriguing and important question.

A recent study attempts to separate them by looking at bribery prosecutions under America's Foreign Corrupt Practices Act.

A report last year pointed out that the costs both of subscriptions and of these "article preparation costs" had been steadily rising at a rate above inflation.

A series of fires and overcrowded conditions led to the construction of the existing Treasury Building.

A smartphone may contain an arrestee's reading history, financial history, medical history and comprehensive records of recent correspondence.

A string of accidents, including the partial collapse of a cooling tower in 2007 and the discovery of an underground pipe system leakage, raised serious questions about both Vermont Yankee's safety and Entergy's management– especially after the company ma

A survey by Barna research group found the top reason given by Americans for the fake news phenomenon is " reader error," more so than made- up stories or factual mistakes in reporting.

A tailor named John Dane, who emigrated in the late 1630s, left an account of his reasons for leaving England that is filled with signs.

A town of culture award could, it is argued, become an annual event, attracting funding and creating jobs.

A turbulent business environment also has senior managers cautious of letting vague pronouncements cloud their reputations.

A typical work, such as Seven Days, consists of a single beautiful black-and-white photograph taken on an epic walk, with the mileage and number of days taken listed beneath.

A young man can decide on a likely spouse on his own and then ask his parents to arrange the marriage negotiations, or the young man's parents may make the choice of a spouse, giving the child little to say in the selection.

About a quarter of all Italian immigrants, for example, eventually returned to Italy for good.

About a third say the problem of fake news lies in "misinterpretation or exaggeration of actual news" via social media.

Above all, they would hope to study a fundamental question: Are humans actually aware of the world they live in?

According to a study by Catalyst, between 2010 and 2015 the share of women on the boards of global corporations increased by 54 percent.

According to research from Princeton University, people assess your competence, trustworthiness, and like ability in just a tenth of a second, solely based on the way you look.

Across generational lines, Americans continue to prize many of the same traditional milestones of a successful life, including getting married, having children, owning a home, and retiring in their sixties.

Across the country, factory owners are now grappling with a new challenge: Instead of having too many workers, they may end up with too few.

After a bruising encounter with Congress, America's financial Accounting Standards Board rushed through rule changes.

After a spouse has been selected, each family investigates the other to make sure its child is marrying into a good family.

After all, if everyone you know is going to college in the fall, it seems silly to stay back a year, doesn't it?

After all, it was rumored that smoking caused cancer for years before the evidence was found to prove a connection.

After bills, Tony has ￡60 a week to spend, ￡40 of which goes on food, but 10 years ago he was earning ￡130,000 a year working in corporate communications and eating at London's best restaurants at least twice a week.

After pickwick, Dickens plunged into a bleaker world.

After the first installment, Dickens wrote to the artist and asked him to correct a drawing Dickens felt was not faithful enough to his prose.

Against a backdrop of drastic changes in economy and population structure, younger Americans are drawing a new 21st-century road map to success, a latest poll has found.

All but two pieces sold, fetching more than £70m, a record for a sale by a single artist.

All he needs to do is shell out $30 for a paternity testing kit at his local drugstore – and another $120 to get the results.

All in all, this clearly seems to be a market in which big retailers could profitably apply their gigantic scale, existing infrastructure, and proven skills in the management of product ranges, logistics, and marketing intelligence.

All of which would, of course, have a positive effect on our happiness levels.

All tests require a potential candidate with whom to compare DNA.

Almost everyone who was interviewed for this special report said that the biggest problem at the moment is not a lack of demand but a lack of good work to sell.

Along with the many folks looking to make a permanent home in the United States came those who had no intention to stay, and who would make some money and then go home.

Also in the early 1900s, French sociologist Emile Durkheim developed a theory of culture that would greatly influence anthropology.

Although a correlation between them leaving and subsequent bad performance at the firm is suggestive, it does not mean that such directors are always jumping off a sinking ship.

实用场景例句

a good knowledge of French: 精通法语

I can only carry two at a time.: 我一次只能带两个。

There's a visitor for you.: 有位客人找你。

She's a friend of my father's (= one of my father's friends) .: 她是我父亲的一位朋友。

a man/horse/unit: 一个人；一匹马；一个单位

an aunt/egg/hour/x-ray: 一个姑母；一个鸡蛋；一小时；一张X光片

...a quarter of an hour...: 一刻钟

Prices start at £13.95 a metre for printed cotton...: 印花棉布以每米13.95英镑的价格起售。

The helicopter can zip along at about 150 kilometres an hour.: 该直升机能以每小时150公里左右的速度疾进。

Most people have very little difficulty in seeing why a Van Gogh is a work of genius.: 多数人不难理解为什么凡·高的作品是天才之作。

...more than a thousand acres of land.: 1,000多英亩地

The full address on a stick-on label was that of a Mrs P. R. Slater of Peterborough...: 不干胶标签上的完整地址写的是彼得伯勒的一位P. R. 斯莱特太太。

A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.: 据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

When I listen to her play I can hear a new Nigel Kennedy.: 从她的演奏中我听出了新一代的奈杰尔·肯尼迪。

As far as I can recall, Patti was a Smith.: 我记得帕蒂是姓史密斯的。

I explained that I was an artist...: 我解释说自己是个艺术家。

He was now a teacher and a respectable member of the community.: 他现在是一位教师，并且是社区内受人尊敬的一员。

It was a Christmas when shoppers passed by expensive silks in favor of more practical gifts.: 这是一个购物者不理会昂贵的丝绸衣服而热衷于更实用礼物的圣诞节。

There was a terrible sadness in her eyes...: 她眼神中流露出深深的悲伤。

He did have a real knowledge of the country...: 他对该国的确知之甚多。

Bollinger 'RD' is a rare, highly prized wine.: 博林格RD香槟是一种名贵的备受推崇的葡萄酒。

I spend a lot on expensive jewelry and clothing...: 我花很多钱购买昂贵的首饰和衣服。

I've come looking for a bit of advice.: 我特来讨教。

Some parents believe a boy must learn to stand up and fight like a man.: 有些父母认为男孩子必须学会像男子汉一样顶天立地，勇于抗争。

...the operation a patient has had.: 病人做过的手术

The interview took place on a Friday afternoon...: 采访是在一个星期五的下午进行的。

...expensive make-up that we saw being advertised by a beautiful model...: 我们所见的由一位漂亮模特代言的昂贵化妆品

I suggest you leave it to an expert...: 我建议你把它留给专家来解决。

A waiter entered with a tray...: 侍者端着托盘进来了。

He started eating an apple...: 他开始吃苹果。

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