Wind turbines, solar panels and devices that extract energy from wave and tide have become more common in recent years.
最近几年,风力机组、太阳能电池板、吸收潮汐能的装置越来越普遍。
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But the researchers discovered that the effect of clouds on larger groups of linked solar panels is a calmer tide of energy-a "smoothing of the fluctuation," as the department puts it.