The competitive cost of wind has made it the second-largest source of new electric power generation in the U.S. for the past three years, behind natural gas and ahead of coal.
风力极具竞争力的价格使得它在过去3年间成为美国第二大新一代电力来源，排名第一和第三的分别是天然气和煤炭。
With the continuous enlargement in capacity of a wind-power generator, the efficiency improvement of electric power generation had been become more and more important.
随着风力机组单机容量的不断增大，提高发电效率已是风力发电研究的重要内容。
With the continuous enlargement in capacity of a wind-power generator, the efficiency improvement of electric power generation had been become more and more important.
随着风力机组单机容量的不断增大，提高发电效率已是风力发电研究的重要内容。
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