The hydrogen gas could then be fed into a storage system and used to generate electricity when additional or backup power is needed.

然后可以将氢气输入到存储系统中，并在需要附加或备用电源时用于发电。

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Backup power could also be provided by linking wind farms with a solar cell, with conventional or pumped-storage hydropower, or with efficient natural-gas-burning turbines.

将风力发电厂与太阳能电池、常规或抽水蓄能的水电或高效的天然气涡轮机连接起来，也可以提供备用电力。

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Because even if, say, offshore wind costs the same as natural gas by 2015 (as predicted by German utility E.ON), there is still an extra cost of building backup power for when the wind doesn't blow.

即便说近海风电成本到2015年(据德国意昂电厂的预测)会与天热气持平，但为了应付没有风的情况，还需建设备份电站，这就会产生额外成本。

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Gas would work well as a backup for wind power, he added.

BBC: Coal-to-gas power shift 'to cut energy costs'

This discourages investors in the flexible, gas-powered generation needed to provide backup for windless, cloudy days.

ECONOMIST: Germany��s energy transformation

Gas stations are now required to have backup power, but the state stockpile will provide a cheaper way to do it.

WSJ: NY budget provides emergency backups for gas pumps