"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。

哈佛公开课 - 计算机科学课程节选