Teachers will never be replaced by computers.电脑永远取代不了老师。replace the old carpets更换旧地毯replace ♦︎ switch ♦︎ change ♦︎ exchange ♦︎ substitute ♦︎ swap ♦︎ trade ♦︎ reverse ♦︎ barterThese words all mean to remove sb/sth and put another person or thing in their place.这些词均表示替换、更换。PATTERNS AND COLLOCATIONS 句型和搭配◆to switch / change / exchange / substitute / swap / trade / barter A for B◆to replace / substitute / switch B with A◆to switch / exchange / swap / reverse A and B◆to replace / change a battery / bulb / fuse / tyre / wheel◆to switch / exchange / swap / reverse roles◆to change / exchange / swap / trade places◆to change / swap seats / clothes◆to exchange / swap / trade stories / jokes◆to exchange / swap experiences / news / phone numbers◆to exchange / trade insults◆to simply replace / switch / change / exchange / substitute / reverse sth◆to easily replace / switch / change / substitute / swap sth■replace [transitive] (ratherformal) to remove sb/sth and put a different or better person or thing in their place替换；接替；更换◆He will be difficult to replace when he leaves.他离职时，他的位置很难有人接替。◆All the old carpets need replacing.所有的旧地毯均要更换。◆She had an operation to replace both hips.她做了一次手术，替换掉两个髋关节。 see also replacement ⇨ exchange■switch [transitive] (ratherinformal) to put one thing in the place of another, and put the second thing in the place of the first交换；掉换；对调◆The dates of the last two exams have been switched.最后两门考试的日期掉换了。◆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？◆I see you've switched the furniture around(= changed its position).我看出来你把家具重摆了。■change [transitive] to replace one thing, person or service with sth new or different; to take sb else's position or place while they take yours替换，更换（东西、人或服务）；互换，交换（位置或座位）◆Marie changed her name when she got married.玛丽结婚后改了姓。◆That back tyre needs changing.那个后轮胎需要更换。◆At half-time the teams change ends.球队在半场时交换场地。◆Can I change seats with you?我可以和你换座位吗？◆I want to change my doctor.我想另找一位医生看病。ⓘ The usual word in American English used to talk about giving sth back for a better thing of the same kind, is exchange; this sounds rather formal in British English.在美式英语中， 表示换上更好的同类东西用exchange，这在英式英语中听起来相当正式◆ (BrE) We changed the car for a bigger one.我们换了辆更大的汽车。◆ (NAmE) We exchanged the car for a bigger one.我们换了辆更大的汽车。■exchange [transitive] to give sth to sb and at the same time receive the same type of thing from them; to give or return sth that you have and get sth different or better instead交换；交流；兑换；更换◆We use the forum to exchange ideas.我们利用这个论坛交流思想。◆I shook hands and exchanged a few words with the manager.我与经理握手，交谈了几句。◆Juliet and David exchanged glances(= they looked at each other).朱丽叶和戴维相互看了看对方。◆The two men exchanged blows(= hit each other).两个男人互殴起来。◆You can exchange your currency for dollars in the hotel.你可以在旅馆将钱兑换成美元。◆If it doesn't fit, take it back and the store will exchange it.如果不合适就把它拿回去，商店会给你换一个。 see also exchange ⇨ exchangenoun, exchange ⇨ discussionnoun■substitute [transitive] to use sb/sth instead of sb/sth else（用⋯）代替，取代◆Margarine can be substituted for butter in this recipe.做这道菜可以用人造黄油代替黄油。◆Butter can be substituted with margarine in this recipe.做这道菜可以用人造黄油代替黄油。◆Gerrard was substituted in the second half after a knee injury(= sb else played instead of Gerrard in the second half).下半场杰拉德膝盖受伤被换下。ⓘ You can substitute A for B or substitute B with A: in both cases you use A instead of B. You can also just say that you substitute sth: in this case the context needs to make clear whether the 'sth' is being used instead of sth, or is replacing sth else.可以说substitute A for B或substitute B with A，这两种说法均指用A代替B。还可以只说substitute sth，但这时必须能从上下文确定替换者和被替换者。 see also substitution ⇨ exchange■swap ( swop) /swɒp; NAmEswɑːp/ (-pp-) [intransitive, transitive] to exchange sth with sb交换；互换◆I've finished this magazine. Can I swap with you?这本杂志我看完了，我能跟你交换一下吗？◆I swapped my red scarf for her blue one.我用我的红围巾换了她的蓝围巾。◆We spent the evening in the bar swapping stories(= telling each other stories) about our travels.我们一晚上坐在酒吧里互聊各自的旅途经历。◆ (especially BrE) Can we swap places? I can't see the screen.咱俩换一下座位好吗？我看不见屏幕。ⓘ Especially in British English, swap can also mean to give or return sth that you have and get sth different or better instead.尤其在英式英语中，swap亦可指改换成别的东西◆I think I'll swap this sweater for one in another colour.我想把这件毛衣换成别的颜色。 see also swap ⇨ exchangenoun■trade [transitive] (especially NAmEorjournalism新闻) to exchange sth with sb交换；互换◆She traded her posters for his CD.她以海报换取他的CD。◆I wouldn't mind trading places with her for a day.我不介意和她掉换一天位置。◆Cabinet colleagues traded insults over the future of the pound.内阁同僚为英镑的未来互相谩骂。NOTE辨析 Switch, exchange, swap or trade?Switch is often used when one thing is exchanged for another without sb else being asked or even knowing about it. * switch常指未征询他人意见或在他人甚至不知情的情况下掉换◆The two babies had been switched at birth.两个婴儿在出生时已被掉换。◆The two babies had been exchanged/swapped/traded at birth.Exchange is more formal than swap or trade and is often used in fixed phrases when people look at or talk to each other. * exchange比swap和trade正式，常用于与相视或交谈有关的固定词组◆to exchange glances / a few words交换眼神；交谈几句◆to swap/trade glances/a few wordsYou can also exchange information/ideas. Swap is used more for physical things, although you can swap stories/jokes; trade is used for things and places, stories, jokes and insults in American English; in British English it is mostly used just for stories, jokes and insults, not physical things. In British English you change/swap places.还可以说exchange information/ideas（交流信息／思想）。swap多指交换实体的东西，但也可以说swap stories/jokes（互相讲故事／笑话）；trade在美式英语中的宾语为物品或places、stories、jokes及insults；在英式英语中的宾语主要是stories、jokes和insults，而非实体的东西。在英式英语中可以说change/swap places（换座位）。■reverse [transitive] to exchange the positions or functions of two people or things交换（位置或功能）◆It felt as if we had reversed our roles of parent and child.我们之间家长与孩子的关系好像倒过来了。◆She used to work for me, but our situations are now reversed.过去她为我工作，而现在我们的地位对调了。ⓘ In this meaning, reverse collocates with roles, situations and positions.表达此义时，reverse与roles、situations和positions搭配。 see also reversal ⇨ exchangenoun■barter [transitive, intransitive] to exchange goods, property or services for other goods, etc. without using money交换（货品、财产或服务）；以物易物◆The local people bartered wheat for farm machinery.当地人用小麦换取农机。◆The prisoners tried to barter with the guards for items like writing paper and books.囚犯试着从看守那里换得稿纸和书之类的东西。 see also barter ⇨ exchangenoun
replacement
noun
replacement ♦︎ substitute ♦︎ reserve ♦︎ surrogate ♦︎ relief ♦︎ understudy ♦︎ stand-in ♦︎ cover ♦︎ proxyThese are all words for a person or thing that you use or have instead of the one you normally use or have.这些词均表示代替者、代替物。PATTERNS AND COLLOCATIONS 句型和搭配◆a replacement / a substitute / a surrogate / an understudy / a stand-in / cover / a proxy for sb / sth◆(an) adequate replacement / substitute / stand-in / cover◆a / an good / satisfactory / appropriate / suitable / likely / possible / ideal / poor replacement / substitute◆to act as a replacement / a substitute / surrogate / understudy / stand-in / proxy◆to get a replacement / a substitute / cover◆to appoint a replacement / substitute / proxy◆to go on as / use sth as a replacement / substitute■replacement [countable] (often used as an adjective常用作形容词) a thing that replaces sth, especially because the first thing is old or broken; a person who replaces another person in an organization, especially in their job替代品，替换物（尤因原先的物品已陈旧或损坏）；（尤指工作上的）接替者，替代者◆a hip replacement人工髋关节◆replacement windows新换的窗子◆If your passport is stolen you should apply for a replacement immediately.如果护照被偷，应立即申请更换。◆We need to find a replacement for Sue.我们需要找一个替代苏的人。 see also replacement ⇨ exchange■substitute [countable] a person or thing that you use or have instead of the one you normally use or have; an extra player who plays in a sports team when one of the other players is injured or not available to play代替者；代替物；代用品；替补队员◆a meat / milk substitute肉食／牛奶替代品◆The book will teach you the theory but there's no substitute for practical experience.本书将教给你理论，但没有任何东西能代替实践经验。◆The local bus service was a poor substitute for their car.坐当地的公交车比坐他们自己的汽车可差远了。◆I regarded them as a substitute family.我把他们看作我的亲人。◆He was brought on as a substitute after half-time.他作为替补队员在下半场上场。ⓘ In informal language a substitute in sports can be called a sub.在非正式语言中，substitute表示替补队员时可简称sub。 see also substitution ⇨ exchange■reserve [countable] (especially BrE) a substitute player in a sports team替补队员；后备队员◆The team consists of three competitors plus one reserve.运动队包括三名参赛选手和一名替补队员。ⓘ The reserves (especially BrE) [plural] are a sports team that plays when the usual one is not available. The reserve [singular] /the reserves [plural] (BrE, NAmE) is an extra military or police force that is not part of a country's regular forces, but is available to be used when needed.尤其在英式英语中，复数形式的the reserves指替补运动队。单数形式的the reserve或复数形式的the reserves指预备役部队、后备警察队◆The missile landed on a US army reserve barracks.导弹落在一处美国预备役部队军营。■surrogate /ˈsʌrəgət; NAmEˈsɜːrəgət/ [countable] (often used as an adjective常用作形容词) (ratherformal) a person or thing that takes the place of, or is used instead of, sb/sth else替代者；替代物；代用品◆She saw him as a sort of surrogate father.在她心目中，他仿佛是能替代父亲角色的人。◆For these people, television is a surrogate for real life.对这些人来说，电视是现实生活的替代品。ⓘ In everyday English, surrogate is most often used to talk about people who take the place of real parents. However, a surrogate mother is usually a woman who actually gives birth to a baby for another woman who is unable to have babies herself. When surrogate is used to talk about things, it is a more formal way of saying substitute.在日常英语中，surrogate最常用于表示替代真正父母的人。不过，surrogate mother通常指代孕母亲。当surrogate修饰事物时，它是substitute更正式的说法。■relief [countable + singular or plural verb] (often used as an adjective常用作形容词) a person or group of people that replaces another when they have finished working for the day or when they are sick替班者；接替人；换班者◆The next crew relief comes on duty at 9 o'clock.下一批换班的员工9点钟接班。◆We have a pool of relief drivers available to us.我们有一些换班的司机可供调用。■understudy /ˈʌndəstʌdi; NAmEˈʌndərstʌdi/ [countable] an actor who learns the part of another actor in a play so that they can play that part if necessary候补演员；替角◆She worked as an understudy to Elaine Page.她担任了伊莲•佩姬的候补演员。■ˈstand-in [countable] (ratherinformal) a person who does sb's job for a short time when they are not available; a person who replaces an actor in some scenes in a film, especially dangerous ones代行职务者；（尤指影视中危险动作的）替身演员◆I acted as Tom's stand-in when he was away.汤姆不在时我替他顶班。◆Most of the stunts are performed by stand-ins.大部分特技由替身演员完成。■cover [uncountable] the fact of sb doing another person's job when they are away or when there are not enough staff代替工作；代劳；替补◆It's the manager's job to organize cover for employees who are absent.安排他人顶替缺席的员工是经理的工作。■proxy [countable, uncountable] (formalorlaw法律) a person who has been given the authority to represent sb else代理人；受托人；代表◆Your proxy will need to sign the form on your behalf.你的代理人将需要代表你在表格上签字。