MySQL has a feature called the query cache that stores the result of a query in memory, should it be needed again.

MySQL 有一个特性称为查询缓存，它将（后面会用到的）查询结果保存在内存中。

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What Is Category and Why Should It Be Needed?

什么是范畴？为什么需要范畴？

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While Ford has yet to require any money, the government has agreed to give it financial support, should it be needed.

BBC: Chrysler approaches key deadline

It has, at the same time, said that if Plan B is needed it should be a monetary, not fiscal, stimulus that is deployed primarily, and where fiscal policy is involved at all it should be - as it was for Labour remember in late 2008 - tax cuts that kick in first.

BBC: IMF set out a 'Plan B' for George Osborne

But it has not cleared up the question of quite how much extra capital will be needed, how it should be raised and precisely when.

BBC: How big is the 'material' hole in banks?