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v (1)(使)調(diào)(交)換位置 ((cause to) exchange or replace (sth) with another)[I，I+prep (with)， I+adv (over/round)， T+n， T+n+prep (with)，T+n+adv (over/round)]：I was on duty last Sunday，but I～ed (with another man). 上周日我值班，但是我(和另一個人)調(diào)換了一下。Stop～ing (a)round and keep to one job. 不要經(jīng)常調(diào)換工作，要安心一種工作?！玴ositions/ideas/pocketbooks 交換位置/想法/筆記本;We～ed sides. 我們交換了場地。(husband and wife)～roles (with each other)(丈夫與妻子)交換角色;His parents are always redecorating the rooms and～ing the furniture (a)round. 他的父母總是重新裝修房間并且調(diào)換家具的位置?！纪絜xchange，change，trade;

(2)(使)改變((cause to) change) [I，I+prep (to)，I+adv (over)，I+adv (over)+prep (to)，T+n，T+n+prep (to)，T+n+adv (over)，T+n+adv (over)+prep (to)]：The lights～ed (from green to red). 燈改變顏色 (由綠色變紅色)。He decided to～to a vegetarian diet/another political party/the production of refrigerators. 他決定改吃素食/轉(zhuǎn)而加入另一政黨/改產(chǎn)電冰箱。Peter～ed over to teaching/a sensible method/new technique. 彼得轉(zhuǎn)而從事教學(xué)/使用一種合理的方法/使用新技術(shù)。Having considered that problem，they～ed the conversation (to a more interesting topic). 考慮完那個問題之后，他們換了話題(談更有趣的話題)。He～ed the lever to the “off” position. 他把控制桿轉(zhuǎn)換到“關(guān)”的位置上。The aim is to～the whole country over to natural gas. 目標是使全國改用天然氣。

(3)鞭打(whip with or as if with a switch)[T+n]：～one's horse to make it faster 鞭打馬使之跑得更快;Grandpa～ed us when we were disobedient. 我們不聽話時外祖父就打我們一頓?！纪絯hip;

(4)開，關(guān)(電器)((cause an electric current to) begin or stop operation)[I+adv (on/off)，T+n+adv(on/off)]：Please～on/off. 請打開/關(guān)掉(機器、煤氣、電源等)?！玱n the television 打開電視;～off the main light/the radio關(guān)掉主燈/收音機;～the machine/the electricity off 關(guān)掉機器/將電源切斷;The equipment/transmitter is～ed on automatically. 這部設(shè)備/發(fā)射機可自動開機。Make sure the current is～ed off at the mains. 確實保證電流與主干電網(wǎng)斷開。

(5)使(火車等)轉(zhuǎn)軌(transfer (trains) from one railroad track to another)[T+n+prep]：～the train to the other track/siding 把火車轉(zhuǎn)向另一軌道/側(cè)線;

(6)很快移(擺)動(move (back and forth) sharply)[I，T+n]：The cat's tail～ed back and forth. 貓的尾巴來回擺動。The horse/cow～ed its tail. 馬/牛來回擺動尾巴。～one's hands away 迅速把手移開;〖同〗move，swing;

switch off (v adv) 1)不再聽或感興趣(vi)(fig，infml)：He～ed off when listening to the pop music. 他對聽流行音樂不再感興趣。2)使感到厭倦(vt)(fig，infml)：That lecture～ed most of the students off. 那個講座使大部分學(xué)生感到厭煩。

n(1)開關(guān)，電門(device for breaking or opening an electric current，etc)[C]：an electric light～ 電燈開關(guān);a two-way～ 雙向開關(guān);press on/off the～按一下接通/斷開電源;The～es are down when the power is on and up when it's off. 電源接通時開關(guān)向下，電源切斷時開關(guān)向上。The～must be broken because the wiring is good and the bulb is brand-new. 開關(guān)肯定壞了，因為接線沒問題，燈泡也是嶄新的。〖同〗box，lever，handle，button;

(2)(鐵路)道岔，轉(zhuǎn)軌器(device for controlling which line a train follows at points)[C]：The train was derailed when the～failed to work. 轉(zhuǎn)軌器失靈，火車脫了軌。The general's private railroad car is standing on the～. 將軍的私人小火車正停在道岔上。

(3)改(轉(zhuǎn))變(big change in sth，usu one that is not expected)[C](=switch-over)(infml)：a～in the train times 列車時刻的變更;a～of support from one political party to another 從支持一個政黨轉(zhuǎn)向支持另一個政黨;make a～in one's plans/one's arrangements 改變計劃/按排;make a～from an unfriendly manner to a friendly manner/from gas to electricity 由不友好的態(tài)度轉(zhuǎn)向友好/由煤氣改用電;After several～es of direction they found themselves on the right road. 好幾次改變方向之后，他們才發(fā)現(xiàn)走對了路。There has been a～in classes between the teachers. 有一次老師們之間相互調(diào)課?！纪絚hange，alternation，trade，shift;

(4)(樹木)軟枝條，細軟鞭子(slender，flexible rod or stick;rod like this used for whipping)[C]：whip the bad boy with a birch/hickory～. 用樺樹/山核桃枝抽打那個不聽話的孩子;〖同〗rod，stick;

(5)長假發(fā)(thick bunch of real or artificial hair worn as part of hair)[C]：put on a～on the head 頭戴假發(fā);

→′switch-blade n 彈簧折刀(=switch knife);′switchboard n 交換臺;配電盤;′switchman n 扳道工人;′switch-over n 大轉(zhuǎn)變;′switchyard n鐵路調(diào)車場