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.
2
他们将一辆自行车改造成了发电机，还造了一台洗衣机、一块太阳能电池板，以及一台小型风机。
They converted a bicycle into a generator and built a washing machine, a solar panel and a small wind turbine.
3
我用自行车架，旧自行车马达，建造了我的发电机。
Using a bicycle frame and an old bicycle dynamo, I built my machine.
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