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The light is on. When you leave, please turn it off.
灯亮着。当你离开时，请把它关掉。
youdao
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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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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》