「开关」英文怎么说？

switch 开关，转换

I want to turn on the light, where is the switch?
我想要开电灯,请问开关在哪儿?

The light switch came away from the wall.
电灯开关从墙上掉了下来。

Our glasses have been switched, this is mine.
咱们的玻璃杯对调了，这个是我的。

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