首页英语词典necessarynecessary的意思

necessary

英 ['nesəs(ə)rɪ] 美['nɛsəsɛri]

英英释义同义词辨析词组搭配考试真题实用场景例句

近义词important required essential exigent imperative obligatory urgent

反义词

adj. 必要的；必需的；必然的
n. 必需品
n. (Necessary)人名；(英)内塞瑟里

CET4TEM4考研CET6中高频词基本词汇

中文词源

necessary 必要的，必需的

ne-,无，没有，不能，词源同no,-cess,走，离开，词源同cede,concession.即不能走的，不能离开的，引申词义必不可少的，必需的。

英英释意

1. anything indispensable;: "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained"

英文词源

necessary: necessary: [14] The original Latin adjective meaning ‘necessary’ was necesse (it was formed with the negative particle ne- from the stem of cēdere ‘yield’, source of English cede, and hence meant etymologically ‘unyielding’). This was subsequently extended to necessārius, and English acquired it via Anglo-Norman *necessarie.
=> cede, concede, proceed
necessary (adj.): late 14c. "needed, required, essential, indispensable," from Old French necessaire "necessary, urgent, compelling" (13c.), and directly from Latin necessarius "unavoidable, indispensable, necessary," from necesse "unavoidable, indispensable," originally "no backing away," from ne- "not" + cedere "to withdraw, go away, yield" (see cede). The root sense is of that from which there is no evasion, that which is inevitable. Necessary house "privy" is from c. 1600. Necessary evil is from 1540s (the original reference was to "woman").
necessary (n.): mid-14c., "needed, required, or useful things; the necessities of life; actions determined by right or law," perhaps from Old French necessaire (n.) "private parts, genitalia; lavatory," and directly from Latin necessarius (n.), in classical Latin "a relation, relative, kinsman; friend, client, patron;" see necessary (adj.).

同义词辨析

indispensable, essential, necessary, requisite

这些形容词均有"必不可少的，必需的"之意。

indispensable：语气强，侧重指绝对必要性或不可缺少性。

essential：指对事物本身性质具有决定性的重要性，暗含不可缺少，否则便无法存在。

necessary：最常用词，侧重由客观因素决定的某种需要，强调不可避免，但并非绝不可缺少。

requisite：正式用词，特指为实现某一目的或得到某种结果而应有的需要，有时可与necessary换用。

考试真题

Russell argues that as robots take on more complicated tasks, it's necessary to translate our morals into AI language.

Now a third and far more significant motivation presents itself: meeting these goals may be necessary to prevent the collapse of our civilization.

When turning work into a game, it is necessary to understand what makes games interesting.

Then, he's going to need to know the technical details of your system and acquire the specific equipment necessary for jamming your specific setup.

Sugar, alcohol and tobacco, economist Adam Smith once wrote, are commodities which are nowhere necessaries of life, which have become objects of almost universal consumption, and which are, therefore, extremely popular subjects of taxation.

It is possible for burglars to make jamming attacks with the necessary equipment and skill.

It is necessary to use terms other than gamification for some professions.

Adults tend to talk about learning as if it were medicine: unpleasant, but necessary and good for you.

People tend to take in a lot more calories than necessary.

Although Kodak anticipated the inevitable rise of digital photography, its corporate（企业的） culture was too rooted in the successes of the past for it to make the clean break necessary to fully embrace the future.

While such vigilant（警觉的）tracking of cancer is a good thing in general, researchers are increasingly questioning whether all of this testing is necessary for the elderly.

And if we keep working toward that goal, someday, perhaps a list won't be necessary.

This is necessary because full-time students probably have to read several hundred pages every week.

She does not think it's necessary to stay home every day with the children and she knows a very reliable babysitter who's willing to come to her house.

Make donations when necessary

But with that policy now being abolished, this holiday incentive is no longer necessary, the government says.

In addition, it is necessary to apply for graduation when you're near the time that you will be completing your graduation requirements.

Is breakfast a necessary start to the day or a marketing tactic by cereal companies?

It is necessary for the companies and state agencies involved to consider the ethical consequences of these potential changes to build a better future for all.

It's not necessary to reply to a mass email sent to numerous recipients.

Such a system could, if necessary, move troops quickly from one area to another.

Their babies retain the ability to produce their own chlorophyll, though they can't generate energy from sunlight until they've eaten enough algae to steal the necessary genes, which they can't yet produce on their own.

To Fendley, a sense of drive and purpose, as well as an effective high-school education, and basic life skills, like balancing a checkbook, are the necessary ingredients for a successful life in America.

With fertilizer prices jumping nearly 50% per metric ton over the last year in some places, human waste is an attractive, and often necessary, alternative.

a basis for explaining human genetic diversityan aid to understanding different populationsan explanation for social and cultural differencesa term to describe individual human characteristicsmodern genetics research is likely to fuel racial conflictsrace is a poorly defined marker of human genetic diversityrace as a biological term can explain human genetic diversitygenetics research should consider social and cultural variablesit is absolutely necessary to put race aside in making diagnosisit is important to include social variables in genetics researchracial categories for genetic diversity could lead to wrong clinical predictionsdiscrimination against black people may cause negligence in clinical treatmentThey be more precise with the language they use.

While we argue phasing out racial terminology ( ' , 术语 ) in the biological sciences, we also acknowledge that using race as a political or social category to study racism, although filled with lots of challenges, remains necessary given our need to understand how structural inequities and discrimination produce health disparities ( ' , 差异 ) between groups, Yudell said.

One analyst suggests it is necessary to accept both the positive and negative aspects of innovative products.

Throughout these series, you will learn more about the profession, the necessary steps to get a social work degree, the rich history of social work and many ways that social workers help others.

And we create opportunity for assessment and intervention, to help clients and communities cope effectively with the reality and change that reality when necessary.

To find effective solutions to climate change, it is necessary to understand what motivates people to make change.

In particular, Arum and Roksa found, college students were not developing the critical thinking, analytic reasoning and other higher-level skills that are necessary to thrive in today's knowledge-based economy and to lead our nation in a time of complex challenges and dynamic change.

Therefore, team building may be necessary in order to improve the group’s performance.

In order to see the world whole, the author thinks it necessary to have some disrance from the world.

The government fails to provide the necessary support.

They believe such a diet which includes no products from animal sources can be deficient in many of the necessary vitamins and minerals our bodies need.

A code number is necessary to run the copy machine

Whether the security checks were really necessary.

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

Furthermore, they say, it is the best way for researchers to gather the range of observations that are necessary to speed up discoveries or to identify large-scale trends.

If the economy starts to shrink again, Baily says, it would make a strong case for a second stimulus—something the Obama administration hopes will not be necessary.

In particular, Arum and Roksa found, college students were not developing the critical thinking, analytic reasoning and other higher-level skills that are necessary to thrive in today's knowledge-based economy and to lead our nation in a time of complex c

It will also be necessary to understand what sort of yield farmers might expect and to establish the plant's safety.

Online security cameras, intelligent lighting and a wealth of sensors that control both temperature and air quality are offering an unprecedented level of control, efficiency, and improvements to what were once classed necessary costs when running a busin

Our study will use a large corporate dataset from a major medical company to examine how technology extends our working hours and thus interferes with necessary cognitive recovery, resulting in huge health care costs and turnover costs for employers.

Therefore, team building may be necessary in order to improve the group's performance.

with fertilizer prices jumping nearly 50% per metric ton over the last year in some places, human waste is an attractive, and often necessary, alternative.

A school boy or girl is unpunctual because he or she does not have the necessary human virtue of self-discipline.

Believing in such a world, many governments have put an end to some of the very necessary regulations on cross-border flows of capital, labour and goods, with poor results.

Every college discussion about community values, social climate and behavior should include recognition of the developmental importance of student autonomy and self-regulation, of the necessary tension between safety and self-discovery.

For many students, Wilson's help is not only appreciated, it's also entirely necessary for them to be able to complete their college education.

Hard work is necessary in one's achievements.

In modern society, punctuality is a necessary virtue.

It is necessary for us to think of others and be considerate to them.

Loans to small local farmers are necessary.

Nutrition is necessary for life, so it is not surprising that food is such an important part of different cultures around the world.

One group was asked to seek out an interaction with its waiter; the other, to speak only when necessary.

Persons in other cultural groups value silence and view it as necessary for understanding a person's needs.

So, comfortable shoes are really necessary.

Students should have a proper attitude towards college before thinking about which college to attend, and it's never too early to make necessary preparations for a healthy and meaningful college experience.

Unfortunately, you must carry the necessary equipment with you, since it's all but impossible to find natural substitutes.

We're taught to read because it's necessary for much of human understanding.

When it comes to emotional support, the author thinks it necessary to surround yourself with supportive people.

This increasingly high level of education is probably a necessary, but not a sufficient, condition for the complex political systems required by advanced economic performance.

Progress in both area is undoubtedly necessary for the social, political and intellectual development of these and all other societies; however, the conventional view that education should be one of the very highest priorities for promoting rapid economic development in poor countries is wrong.

To be sure, he performs an impressive variety of interesting compositions, but it is not necessary for me to visit Avery Fisher Hall, or anywhere else, to hear interesting orchestral music.

Humanity has the necessary agro-technological tools to eradicate hunger, from genetically engineered crops to artificial fertilizers.

For him, order does not result from forgetting or ignoring the disorders that plague our existence; order is a necessary development, an improvement that may lead to the Greek ideal of spiritual elevation.

That is a necessary and practical approach.

If it clears the House, this measure would still have to get through the Senate where someone is bound to point out that it amounts to the bare, bare minimum necessary to keep the Postal Service afloat, not comprehensive reform.

Further arrangements- and there may be many-between the NHS and DeepMind will be carefully scrutinised to ensure that all necessary permissions have been asked of patients and all unnecessary data has been cleaned.

"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.

"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.

At the very least, it has awoken us from our national fever dream of easy riches and bigger houses, and put a necessary end to an era of reckless personal spending.

But are such government mandates even necessary?

first, it is very expensive to set up the computer, card reader, and telecommunications networks necessary to make electronic money the dominant form of payment.

Further arrangements—and there may be many—between the NHS and Deep mind will be carefully scrutinized to ensure that all necessary permissions have been asked of patients and all unnecessary data has been cleaned.

If it clears the House, this measure would still have to get through the Senate-where someone is bound to point out that it amounts to the bare, bare minimum necessary to keep the Postal Service afloat, not comprehensive reform.

On the one hand, it's a necessary condition for many worthwhile things: child care, friendships, etc.

Progress in both areas is undoubtedly necessary for the social, political and intellectual development of these and all other societies; however, the conventional view that education should be one of the very highest priorities for promoting rapid economi

That's because happiness is linked to the kind of longer-term thinking necessary for making investments for the future.

They argue that government action is necessary to curb Britain's addiction to unhealthy food and help halt spiraling rates of obesity, diabetes and heart disease.

This might sound small, but to undo the effects of such a decrease a candidate would need 30 more GMAT points than would otherwise have been necessary.

To be sure, he performs an impressive variety of interesting compositions, but it is not necessary for me to visit Avery fisher Hall, or anywhere else, to hear interesting orchestral music.

词组搭配

a necessary evil

something that is undesirable but must be accepted

无法避免的坏事；不得已的事

实用场景例句

It may be necessary to buy a new one.: 也许有必要买个新的了。

It doesn't seem necessary for us to meet.: 我们似乎没必要见面。

Only use your car when absolutely necessary.: 非用不可的时候再用你的汽车。

If necessary , you can contact me at home.: 必要的话，我在家时你也可以和我联系。

I'll make the necessary arrangements.: 我会做一些必要的安排。

This is a necessary consequence of progress.: 这是发展的必然后果。

I kept the engine running because it might be necessary to leave fast...: 我没让发动机熄火，因为也许需要迅速离开。

We will do whatever is necessary to stop them...: 我们要采取一切必要措施去阻止他们。

Wastage was no doubt a necessary consequence of war...: 巨大的损耗无疑是战争的必然结果。

Scientific work is differentiated from art by its necessary connection with the idea of progress.: 科学工作与艺术的区别在于它与人类进步有着必然联系。

...a small parcel of necessaries tied up in a handkerchief and carried on a stick.: 用手绢包好挑在棍子上的一小包生活必需品

If necessary, the airship can stay up there for days to keep out of danger...: 必要时，飞艇能在那里停留数天以躲避危险。

The army needs men who are willing to fight, when necessary...: 军队需要在必要时愿意投入战斗的军人。

They were ready to die , if necessary, for their country.: 必要时, 他们愿为国捐躯.

This place is rather cramped.: 这地方太局促了.

They always sum up their ( work ) experience whenever it is necessary, so they improve rapidly.: 他们总是随时总结经验, 所以工作质量提高很快.

He wasn't good navigator, so it is necessary that the coastline remain in sight as he moved from one harbor to the next.: 他不擅航海, 所以当他从一码头驶到另一码头时,得一直沿海岸线航行.

He believed that in building socialism it was necessary to make thorough plans on behalf of the state.: 他认为搞社会主义,要替国家好好打算盘.

It's necessary for leading cadres to keep frequent contacts with the masses.: 领导应和群众经常见面.

It's necessary for us to net the currant bushes.: 我们有必要用网盖上红醋栗树.

They has possessed themselves of all the necessary material.: 他们已取得了所有必要的材料.

It is both important and necessary to note this difference.: 注意到这个差距是重要的和必要的.

The ability to do this will be necessary in future flights to distant planets.: 将来飞往遥远的行星时,需要这样的能力.

This has made it necessary for agriculture and industry to develop very quickly.: 这就使得工农业必须飞速发展.

Is it necessary to send a car for them?: 用得着派车去接他们吗 ?

necessary

中文词源

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考试真题

词组搭配

a necessary evil

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