Can you reach the light switch from where you're sitting?
从你坐的地方够得着灯的开关吗?
She groped blindly for the light switch in the dark room.
她在黑暗的房间里摸索电灯开关。
"By imposing a tax on every American who drives a car or flips on a light switch, this plan will drive up the prices for food, gasoline and electricity,".
VOA: standard.2009.06.27
You don't need a light switch or a light bulb or an iPhone app to turn something on or off.
你不需要一个电灯开关,或者一个电管,或者打开关闭一个iPhone应用程序。
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