单词详解

1. n. [C]

A.开关，电闸，电键( control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit)
You pressed the wrong switch. 你按错了开关。

I wish to turn on the machine, where is the switch?

我想要启动这台机器，请问开关在哪儿?

B.变更，转换，更改(the act of changing one thing or position for another)

Nobody wants to switch back to the old system. 谁也不希望回复到旧制度。

2. vt.

A.打开(或关掉)……的开关[(+on/off)]  ( cause to go on or to be engaged or set in operation)
He switched on the light.他打开电灯。

Do you mind if I switch the TV off? 我可以关掉电视吗？

B.改变，转移，调动[ exchange or give (something) in exchange for]
They switched the talk to a more interesting subject.
他们把谈话转到比较有趣的题目上去了。

相关词组

1.switch on接通，开启

  I hear that song whenever I switch on the MP3. 每次打开MP3我都听那首歌。

2. switch off（用开关）关掉；切断（电源）

  Please switch off the light when you go to bed. 睡觉前请关灯。

相关单词

名词：switcher交换机

过去式：switched

过去分词;switched

现在分词：switching

第三人称单数：switches