In some parts of the world, cyclists have been powering safety lights for years with devices called bicycle dynamos, which use a generator to create alternating current with every turn of the wheels.
3
海啸看来还冲走了位于地面之上的发电机油箱,以及重要的核电站电力开关装置。
The tsunami also apparently washed away the generators' fuel tanks, which were above ground, as well as important electrical switching equipment for the complex.