名词
中文翻译：开关灯
同义词：
['turn on', 'switch on', 'turn off', 'switch off']
例句：
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1. I need to switch the light on before I go to bed.
我需要关灯睡觉。
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2. The switch is broken;we'll have to switch on a new one.
开关坏了，我们得换一个新的。
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3.Please switch off the lights when you leave the room.
离开房间时请关闭灯。