风能
风能是因空气流动而产生个一种可利用个能量。空气流具有个动能称风能。空气流速越高，渠个动能越大。用风车可以拿风个动能转化为有用个机械能；而用风力发动机可以拿风个动能转化为有用个电力，方法是透过传动轴，拿转子（由以空气动力推动个扇叶组成）个旋转动力传送到发电机。
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