The rotation rate of the windmill varies with the wind speed. In order to relieve fluctuation of the output rotation rate, we have to need the complicated and heavy speed regulation system.
风力机的转速随风速的大小而变化，为使输出转速的波动性减小，必须设置复杂而笨重的调速系统。
The rotation rate of the windmill varies with the wind speed. In order to relieve fluctuation of the output rotation rate, we have to need the complicated and heavy speed regulation system.
风力机的转速随风速的大小而变化，为使输出转速的波动性减小，必须设置复杂而笨重的调速系统。
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