| [/swɪtʃ; swɪtʃ/] n 用法:
1 (a) device for completing or breaking an electric circuit （电路的）开关, 电门, 转换器, 闸:
a light switch 灯的电门 *
press the on/off switch 按开关通电[断电] *
a two-way switch, eg at the top and bottom of a staircase 双路开关（如楼梯上下两端的）.
(b) device at the junction of railway tracks to allow trains to go from one track to another （铁路的）道岔,转辙器.
(C) (US) = points (point1 18). 用法:
2 (also `switch-over) (infml) (esp sudden) shift or change （尤指突然的）转变, 改变:
Polls showed a switch to Labour. 民意测验表明形势转而对工党有利. *
a switch from gas to electric 由使用煤气改为使用电气 *
make a switch from publishing to teaching 由出版工作改做教学工作 *
a switch in method, policy, opinion 方法、 政策、 观点的改变. 用法:
3 thin flexible twig or shoot cut from a tree; tapering rod like this used for urging a horse, etc forward （从树上砍下的）细软枝条; （策马等用的）枝条状的鞭子. 用法:
4 piece of real or false hair for making a woman's hair appear thicker or longer （女用）假发. switch 2
v 用法:
1 [I, Ipr, Ip, Tn, Tn.pr, Tn.p] ~ (sth) (over) (to sth) (cause sth to) shift or change, esp suddenly （使某事物）转变或改变（尤指突然）:
switch to modern methods 改用现代方法 *
Many voters switched to Labour. 许多选举人改投工党的票. *
Computers are everywhere now our firm is switching over soon. 计算机现已普及--我公司亦即将使用. *
switch the conversation to a different topic 改变谈话的话题 *
Could you switch the TV over? 请你改换电视频道好吗? 用法:
2 [I, Ipr, Ip, Tn, Tn.pr, Tn.p] ~ (sth) (with sb/sth); ~ (sth) over/round (cause sb/sth to) exchange positions; change over （使某人[某事物]）交换位置; 转换:
Our glasses have been switched this is mine. 咱们的玻璃杯对调了--这个是我的. *
Husband and wife should switch roles (with each other) occasionally. 夫妻间应该偶尔（彼此）对调充当的角色. *
You drive first and then we'll switch round/over. 你先驾驶, 过一会儿咱们再换著开. 用法:
3 [Tn] whip or flick (a horse, etc) with a switch(3) 用鞭子等抽打（马等）. 用法:
4 [Tn.pr] move (a train, etc) onto another track 将（列车等）转入另一轨道:
switch a train into a siding 把一列火车转入支线轨道. 用法:
5 (phr v) switch (sth) off disconnect (electricity, etc) 切断（电流等）:
Switch off the gas, power, etc at the mains 切断煤气源、 电源等 *
Don't switch (the TV) off yet. 暂时不要关掉（电视机）. switch (sb) off (infml) (cause sb to) become dull, bored, etc （使某人）感到乏味、 厌烦等:
I switch off when he starts talking about cars. 他一谈起汽车我就厌烦. *
Long lectures really switch me off. 我觉得冗长的演讲很烦人. switch (sth) on connect (electricity, etc or an appliance) 接通（电流等）; 开（用电器）:
Switch on the light at the wall-socket. 把电灯接通在墙上的电源插座上. *
Don't switch (the radio) on yet. 暂时不要打开（收音机）. |