switch

• vt. 转换；用鞭子等抽打
• vi. 转换；抽打；换防
• n. 开关；转换；鞭子

最终来自 PIE*swei,弯，转，摆动，词源同 swing,swivel.引申诸相关词义。

1. control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit

2. an event in which one thing is substituted for another;

"the replacement of lost blood by a transfusion of donor blood"

3. hairpiece consisting of a tress of false hair; used by women to give shape to a coiffure

4. railroad track having two movable rails and necessary connections; used to turn a train from one track to another or to store rolling stock

5. a flexible implement used as an instrument of punishment

6. a basketball maneuver; two defensive players shift assignments so that each guards the player usually guarded by the other

7. the act of changing one thing or position for another;

"his switch on abortion cost him the election"

switch

switch: [16] Switch originally denoted a ‘thin flexible twig’; it may have been borrowed from Middle Dutch swijch ‘bough, twig’. From the noun was derived the verb switch. This originally meant ‘beat with a switch’, but in the early 19th century the sense ‘bend or waggle to and fro like a flexible stick’ emerged, and this led on in the middle of the century via ‘divert’ to ‘turn off a train on to another track’ (the usage developed in American English, where the apparatus used for this is still known as a switch, as opposed to British English points).

By the end of the century this had broadened out to ‘connect or disconnect by pushing a contact to or fro’. The notion of ‘exchanging’ or ‘swopping’ did not emerge until as recently as the 1890s.

switch (n.)

1590s, "slender riding whip," probably from a Flemish or Low German word akin to Middle Dutch swijch "bough, twig," or swutsche, variant of Low German zwukse "long thin stick, switch," from Germanic base *swih- (cognates: Old High German zwec "wooden peg," German Zweck "aim, design," originally "peg as a target," Zwick "wooden peg"), perhaps connected with PIE root *swei- (2) "to swing, bend, to turn."

The meaning "device for changing the direction of something or making or breaking a connection" is first recorded 1797. "The peg sense suits the mech(anical) applications" [Weekley], cognates: switchblade, and these senses in English may be a direct borrowing from those senses in Continental Germanic languages rather than a continuation of the "pliant wand" sense. The meaning "a change from one to another, a reversal, an exchange, a substitution" is first recorded 1920; extended form switcheroo is by 1933.

switch (v.)

1610s, "to strike with a switch," from switch (n.). Related: Switched; switching. The meaning "turn (off or on) with a switch device" is first recorded 1853 of trains on tracks, 1881 of electricity, 1932 of radio or (later) television. Sense of "shift, divert" is from 1860. Meaning "to change one thing for another" is recorded from 1919. Switch-hitter is 1945 in baseball slang; 1956 in the sense of "bisexual person."

Within two years, Leah shed the safety of her accounting job and made the switch complete.

出自-2017年6月阅读原文

The man in the Google vehicle reported that he assumed the bus would slow down to let the car out, and so he did not switch to the manual mode.

出自-2017年6月听力原文

So take a step back, switch off the automatic pilot and actually stop and reflect about things like our priorities, our values, and our relationships.

出自-2016年6月阅读原文

students can switch to different discussions at any point

出自-2013年6月阅读原文

Large companies have a difficult time switching into new markets because there is a temptation to put existing assets into the new businesses.

出自-2013年6月阅读原文

Why do large companies have difficulty switching to new markets

出自-2013年6月阅读原文

They can easily switch to natural gas.

出自-2013年6月听力原文

Switch off the refrigerator for a while.

出自-2010年12月听力原文

Nadeau notices the pre-made macaron-and-cheese boxes in Scott's shopping cart and suggests she switch to whole grain macaroni and real cheese.

2018年12月四级真题（第一套）阅读 Section B

within two years, Leah shed the safety of her accounting job and made the switch complete.

2017年6月四级真题（第二套）阅读 Section B

When you hear people speaking of making a rapid transition toward any type of energy, whether it is a switch from coal to nuclear power, or a switch from gasoline-powered cars to electric cars, or even a switch from an incandescent to a fluorescent light, understanding energy system inertia and momentum can help you decide whether their plans are feasible.

出自-2015年12月阅读原文

When performing, he positions his instruments in a way that is deliberately inconvenient, so that switching from guitar to organ mid-song involves a mad dash across the stage.

出自-2013年12月阅读原文

When China talks about switching its dollar reserves to other currencies.

出自-2012年12月阅读原文

I needed to switch my computer class to the 950 section.

出自-2014年6月听力原文

Many people now say the benefits of switching to vegetarian diet which excludes meat and fish.

出自-2013年6月听力原文

However, some nutritionists advise against switching to a totally strict vegetarian diet

出自-2013年6月听力原文

Packing up again with no picnic, Zac had to switch schools for the second time and space is even tighter

出自-2012年12月听力原文

Let's hope they' re wise enough not to be fooled by a machine that claims to determine truthfulness at the flip of a switch.

2018年12月六级真题（第一套）听力 Section C

Many dairy farmers were persuaded to switch to grass-fed when they saw its advantage in terms of profits.

2019年12月六级真题（第三套）阅读 Section B

Over the years, Tim Joseph's partners have helped many dairy farmers to switch to grass-fed.

2019年12月六级真题（第三套）阅读 Section B

So, instead of innovation for innovation's sake and new products being created simply because the technology is there, the company culture must switch from these point-in-time innovations to a continuous pipeline of innovations from everywhere and everyon

2016年6月六级真题（第一套）听力 Section A

This mood switch made no difference to the three-month-olds; but for the nine-month-olds, it was enough to renew their interest and they started looking again in the direction of the face.

2019年12月六级真题（第一套）听力 Section C

We can't switch off global warming just by being good in the future.

2016年6月六级真题（第一套）听力 Section C

When you hear people speaking of making a rapid transition toward any type of energy, whether it is a switch from coal to nuclear power, or a switch from gasoline -powered cars to electric cars, or even a switch from an incandescent to a fluorescent light

2015年12月六级真题（第一套）阅读 Section B

And if a predator can move on to another species that is easier to find when a prey species becomes rare, the switch allows the original prey to recover.

2019年高考英语天津卷 阅读理解 阅读C 原文

For some reason, when certain shows switched into a commercial, a loud noise would sound for a few seconds.

2015年高考英语全国卷2 阅读理解 阅读A 原文

Others say we can just "switch them off" as if super intelligent machines are too stupid to think of that possibility.

2017年高考英语北京卷 阅读理解 阅读D 原文

So if we send out a robot with the single instruction of fetching coffee, it will have a strong desire to secure success by disabling its own off switch or even killing anyone who might interfere with its task.

2017年高考英语北京卷 阅读理解 阅读D 原文

The nursery team switches him every few days with his sister so that while one is being bottle-fed, the other is with mum-she never suspects.

2016年高考英语全国卷1 语法填空 原文

This switch has decreased pollution in the country's major lakes and reservoirs and made drinking water safer for people.

2018年高考英语全国卷2 语法填空 原文

Few switch DNT on now, but if tracking is off it will stay off.

出自-2013年考研阅读原文

At Boston College, for example, you would have to complete an extra year were you to switch to the nursing school from another department.

2017年考研真题（英语二）阅读理解 Section Ⅱ

When our brains switch between being focused and unfocused on a task, they tend to be more efficient.

2018年考研真题（英语二）阅读理解 Section Ⅱ

a light switch

电灯开关

牛津词典

an on-off switch

通断开关

牛津词典

That was in the days before electricity was available at the flick of a switch .

那是在过去，还没有到开关一响就有电的时代。

牛津词典

Which switch do I press to turn it off?

我按哪个开关就能把它关了？

牛津词典

to throw a switch (= to move a large switch)

扳动开关

牛津词典

a switch of priorities

轻重缓急的改变

牛津词典

She made the switch from full-time to part-time work when her first child was born.

第一个孩子出生后她就从全职工作改为兼职工作。

牛津词典

a policy switch

政策的转变

牛津词典

a riding switch

马鞭

牛津词典

We're in the process of switching over to a new system of invoicing.

我们正在转用新的发票制度。

牛津词典

Press these two keys to switch between documents on screen.

按这两个键就可以在屏幕上的文件之间进行切换。

牛津词典

When did you switch jobs?

你们什么时候调动工作的？

牛津词典

The dates of the last two exams have been switched.

最后两门考试的日期掉换了。

牛津词典

I see you've switched the furniture around (= changed its position) .

我看出来你把家具重摆了。

牛津词典

Do you think she'll notice if I switch my glass with hers?

要是把我的杯子跟她的换了，你认为她看得出来吗？

牛津词典

I can't work next weekend─will you switch with me?

下个周末我不能上班——咱俩调个班好不好？

牛津词典

Have you been able to switch your shift with anyone?

你找着能跟你调班的人了吗？

牛津词典

When I hear the word ‘football ’ I switch off (= because I am not interested in it) .

我听见“足球”两个字就腻味。

牛津词典

The only time he really switches off (= stops thinking about work, etc.) is when we're on vacation.

只有在我们外出度假的时候，他才真正无牵无挂。

牛津词典

Please switch the lights off as you leave.

你离开的时候请把灯关了。

牛津词典

How do you switch this thing on?

这东西怎么开？

牛津词典

Leona put some detergent into the dishwasher, shut the door and pressed the switch.

利昂娜将一些清洁剂放入洗碗机，关上门后按了开始键。

柯林斯高阶英语词典

...a light switch.

电灯开关

柯林斯高阶英语词典

Estonia is switching to a market economy...

爱沙尼亚正在向市场经济转轨。

柯林斯高阶英语词典

The law would encourage companies to switch from coal to cleaner fuels...

该法律将鼓励企业转而使用比煤更加清洁的能源。

柯林斯高阶英语词典

My mother's interest had switched to my health...

母亲转而关注起我的健康来。

柯林斯高阶英语词典

As the era wore on, she switched her attention to films.

随着这个时代慢慢过去，她把目光投向了电影业。

柯林斯高阶英语词典

In half an hour, they'd switched the tags on every cable...

半个小时内，他们就给每根电缆都换了标签。

柯林斯高阶英语词典

The ballot boxes have been switched.

投票箱被人调换了。

柯林斯高阶英语词典