开关的英文是switvh，当然也可以写为derail，或者是disjunctor等。例句：The switch works by passing a pulse of current between the tip and the surface。
例句
我对面有一大堆旋钮，控制杆和开关。
I was confronted with an array of knobs, levers, and switches.
内德开关亮起了装电池的灯。
Ned turned on the lanterns, which worked with batteries.
吊灯和壁灯开关可以独立安装。
Ceiling and wall lights can operate independently.
对讲机发出电流声，他按下了开关键。
The intercom buzzed and he pressed down the appropriate switch.
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