压缩空气发电站效率不高，因此它只有在电价波动大的地方才具有商业可行性。

Compressed-air plants are inefficient, and so they are commercially viable only in places where the price of power varies dramatically.

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随着全球变暖趋势不断增加，多数人都在寻求提高效率和节约能源——从而减少发电站的温室气体排放。

With global warming an ever increasing issue, most people are looking for ways to improve efficiency and save energy - and therefore reduce power-station emissions of greenhouse gases.

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同大多数富国一样，英国燃煤发电站的平均燃烧效率在35%左右。

In Britain, as in most rich countries, the average efficiency of coal-fired power stations is about 35%.

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