Even when we turn off the bedside lamp and are fat asleep, electricity is working for us, driving our refrigerators, heating our water, or keeping our rooms air-conditioned.

即使当我们关掉了床头灯，深深地进入睡乡时，电仍在为我们工作，它帮我们开动冰箱，帮我们烧水或使我们房间里的空调机保持运转。