Every election throws up an identikit swing voter - "Mondeo man" and "Worcester woman" in campaigns of yore-whose demographic group is said to hold the key to the outcome.

每一次选举都会抛出一个招摇的选民，譬如昔日运动中的“蒙迪欧男人”和“伍斯特女人”，据统计，其人数掌握着最终的结果。

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The Pakistanis believe they are close to convincing America that they hold the key to stabilising Afghanistan.

巴基斯坦人认为，他们就快要让美国人相信，他们有办法让阿富汗保持稳定。

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Exercise may hold the key to youth, according to a study which showed people who keep fit are up to nine years biologically younger than those who do not.

一项研究表明，锻炼身体是永葆青春的秘诀。研究发现，健身的人比不怎么锻炼的人在生理上要年轻九岁。

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And most of these commands you don't actually need but this little caret symbol means control, so every keyboard these days has a control key so you hold that and hit X for instance to exit the program.

这里大多数命令你们都用不着,这个小插入符意味着控制，每个键盘都有一个控制键,譬如，当你敲入X时，就退出这个程序。

哈佛公开课 - 计算机科学课程节选

You might have to hold the Shift key or something like that, but they're standard keys.

你可能要按住Shift键或什么键，但他们是标准键。

哈佛公开课 - 计算机科学课程节选

The Pakistanis believe they are close to convincing America that they hold the key to stabilising Afghanistan.

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In the Senate, where the ship is not quite so waterproof, Dole agreed to a package of concessions to woo party moderates, who could hold the key to the bill's passage.

CNN: Senate poised to pass Republican budget

Dr MacDonald and Dr Barber are therefore studying these cells to see whether they hold the key to the prostitutes' immunity.

ECONOMIST: Living with AIDS