然而,截至目前,全世界仅有两个压缩空气发电站(一个在美国,另一个在德国),但都不是利用风能来压缩空气的。
At the moment, however, there are only two compressed-air energy-storage plants in the world (one in America and one in Germany), and neither was built to make use of wind power.
然而,截至目前,没有一种城镇农场设计变成主流。
然而第一季度的电产量比一年之前低4%;比较起来,总产量截至2008年第一季度增长了16%。
Yet electricity production in the first quarter was 4% lower than it had been a year earlier; in comparison, production grew by 16% in the year to the first quarter of 2008.
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