There's a similar story for my electricity consumption, where switching off the DVD players, the stereos, the computer peripherals that were on all the time, and just switching them on when I needed them, knocked another third off my electricity bills too.
我的用电量也是如此， 通过随手关掉那些永远开着的DVD播放器、音响、 计算机外围设备等等， 我只在需要使用这些电子产品时才会将他们打开， 这样，我的用电量又被减了三分之一。