名词
中文翻译：Unknown
同义词：
['switching power', 'power switch', 'power supply']
例句：
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1.The power switch is located on the wall behind the desk.
电源开关位于桌子后面的墙上。
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2.The power switch controls the flow of electricity to the lights.
电源开关控制着向灯输送的电流。
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3.During power outages, it's essential to have a backup power switch in place.
在停电期间，拥有备用电源开关是至关重要的。