One unknown will be to what extent weather helps. When the wind blows strong out of the north, Beijing's skies can clear quickly.
一个未知因素就是天气可以提供多大程度的帮助。
You cannot control when the wind blows, and there is a strong need for large, high-volume energy storage to accompany the wind farms.
您无法控制何时起风，因此陪同风力发电场极力需要建立大型、高容量的能量储备。
First, she mimicked the sound that is created when a strong wind blows through bamboo.
一开始，她模仿强风穿过竹林的声音。
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