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Please switch the lights off as you leave.
你离开的时候请把灯关了。
《牛津词典》
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Turn the light off as you go out.; Please switch off the lights when you leave.
出门时请随手关灯。
《新英汉大辞典》
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Before you start please be sure to switch off all the lights.
出发前请务必把所有的灯关掉。
youdao
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Before you start please be sure to switch off all the lights.
出发前请务必把所有的灯关掉。
youdao