Wind power is a very clean source of energy.

风能是一种非常清洁的能源。

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Gharib and Graff set themselves the task of raising a 4.5-meter stone column from horizontal to vertical, using no source of energy except the wind.

加里卜与格拉芙制定了一项任务：仅利用风能，将一个水平放置的4.5米高石柱提至与地面垂直。

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Wind power is a very popular source of energy.

风力是一种非常受欢迎的能源。

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Wind is a good energy source but it's intermittent - we can fill that gap.

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Driven by falling turbine prices and the rush to take advantage of production tax credits (which were set to expire but were renewed by Congress in early January), wind energy was the fastest growing source of new electricity generation in the United States in 2012.

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But the UK government is heavily dependent on wind energy more than any other renewable source of power, to provide 15% of its green energy by 2020.

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