We need backup singers. Who can sing?

我们需要合音谁会唱歌？

youdao

I won't need backup.

我将不需要后援。

youdao

I need backup!

我需要后援。

youdao

You really need that because if you have only one copy of something, you don't have a backup; so, you can store the one copy separately.

你真的很需要这项发明,因为要是你只有一份的话，你就没有备份;,这样的话，你就可以将副本单独留存。

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But experts note that even renewables need conventional backup, since the sun doesn't always shine and the wind doesn't always blow.

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It was clear that the campaign would need a backup plan if Clinton and Obama split the first four states, which is what happened.

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