1 a small button or sth similar that you press up or down in order to turn on electricity (电路)开关:
a light switch电灯开关
2 a sudden change 突然的改变:
a switch in policy政策的骤变
*switch²
/swɪtʃ ||; swɪtʃ/verb[I,T]
1switch (sth) (over) (to sth);switch (between A and B) to change or be changed from one thing to another 转变;改变:
I'm fed up with my glasses -- I'm thinking of switching over to contact lenses.我眼镜戴腻了,正考虑改换隐形眼镜。Press these two keys to switch between documents on screen.按这两个键可以在屏幕上从一个文件切换到另一个文件。The match has been switched from Saturday to Sunday.比赛日期已从星期六改到星期日。
2switch (sth) (with sb/sth);switch (sth) (over/round) to exchange positions, activities, etc 交换(位置、活动等):
This week you can have the car and I'll go on the bus, and next week we'll switch over.这个星期你用车子,我坐公共汽车,下个星期我们对调。Someone switched the signs round and everyone went the wrong way.有人把路标对调,结果大家都走错了路。
switch (sth) off/on to press a switch in order to start/stop electric power (用开关)接通/切断电流;打开/关掉:
Don't forget to switch off the cooker.别忘记关掉炉子。switch (sth) over to change to a different television programme 转换电视频道
switch1/swItʃ; swItʃ/v [I,T]1 to change from one thing to another thing [ change ] 转换﹐转变﹐改变: +to If you switch to a low-fat diet, your health will improve. 如果你改吃低脂肪的食品﹐健康状况便会改善。switch from sth to sth He kept switching from one subject to another. 他不停地转换话题。+between It is possible to switch between courses. 转换课程是可以的。soldiers who switch sides 倒戈的士兵2 to exchange things, or replace one thing with another thing [ change ] 交换﹔改换﹐更换: switch sth for sth I’m going to switch it for something newer. 我打算换个更新的。switch off phr v to turn off a machine, light etc, using a switch 关掉﹐关上〔机器﹑灯等〕: switch sth off My mobile phone was switched off. 我的手机关掉了。Switch off the lights before you leave. 离开之前把灯关掉。switch on phr v to turn on a machine, light etc using a switch 打开〔机器﹑灯等〕: switch sth on Switch the radio on. 把收音机打开。The video will switch on automatically . 录象机会自动开启。see box at见 OPEN2 方框switch over phr v 1 to change to a different television CHANNEL 转换〔电视频道〕2 to start using a different product, system etc 改用〔别的产品﹑系统等〕: +to More and more people are switching over to internet banking. 越来越多的人改用网上银行服务。
switch2n [C]1 the thing you press to make a machine, light etc start or stop working〔机器﹑电灯等的〕开关: a light switch 电灯开关2 a change from one thing to another 转换﹔转变: +to Shoppers are making the switch to organic food. 顾客开始改买有机食品。+in a switch in emphasis 重点的转移
switchswitchswitchesswitchedswitching2verb (switches, switching, switched)to change to something different: I switched to another seat because I couldn't see the film.switch something offto make a light or a machine stop working by pressing a switchsame meaningturn something off: I switched the TV off. Don't forget to switch off the lights!switch something onto make a light or a machine work by pressing a switchsame meaningturn something on: Switch the radio on.switchswitchswitches1noun (pluralswitches)a small thing that you press to turn electricity on or off: Where is the light switch?