That's the limiting factor for both sun and wind energy.

这就是利用太阳能和风能的限制性因素。

So ice cooling also functions as a way to store wind energy.

因此，冰的冷却也可作为一种储存风能的方式。

Electric transmission critical to Iowa's wind energy success.

电力传输网络对爱荷华成功开发风电非常重要。

Wind energy requires a certain amount of sustained wind speeds to be effective.

风能需要一定量的持续风速才能起作用。

Water is solar heated, and a levitating kinetic art sculpture creates wind energy!

屋内使用太阳能板加热热水，并且，漂浮的雕塑可以产生风能！