SOURCE 👉https://www.youtube.com/watch?v=0VfxdRbOVNI
windmill 风车
mechanical energy 机械能
turbine /'tɜːbaɪn/ 涡轮
sail 原义为"帆",此处指扇叶
blade 原义为"刀片",此处指风扇叶片
Jonathan makes some simple paper windmills/turbines and experiments with a simple generator to power house hold devices such as torches, calculators and even a radio.
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