Turn the light off, and you might fall asleep.

关上灯，或许你能睡着。

Please turn the light off before leaving the room.

离开房间前,请把灯关掉.

OK, Mickey, I'm going to turn the light off. We'll see you later on.

好的，米奇，我要关灯了。一会见。

Installing occupancy sensor switches saves energy by never having to remember to turn the light off.

安装感应开关让人们不再会忘记了关灯,从而节约了能源.