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But they've been too expensive to replace conventional power plants in most cases.

但是，在绝大多数情况下，燃料电池价格昂贵，无法替代常规发电厂。

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Like conventional power plants, a nuclear site cranks out electricity using steam-driven turbines.

就像普通的发电厂一样，一个核发电厂需要蒸汽涡轮来发电。

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But Deputy Defense Secretary William Lynn says the ability to project conventional power without the threat of missile attacks is crucial to the U.S.global security strategy, and its treaty obligations.

VOA: standard.2010.03.26

The primary argument against taking advantage of our affordable conventional energy sources is the emissions from conventional power plants.

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For instance, fuel consumption can be cut by about 1% by switching from conventional power steering to electronically controlled power steering.

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Offshore Wind Farms are the future energy option to supplement conventional power.

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