宇航员在太空漫步中花费的每一个小时，都是他们在泳池里训练7个小时换来的。

For every one hour, they will spend on a spacewalk, astronauts need to train seven hours in the pool.

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一项研究表明，在电视机前每一个小时就会增加百分之七患心脏病的可能性。

Every hour in front of the box pushes up the risk of dying from heart disease by 7 per cent, according to a study.

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但是，对应每一个小时的组织，就有两个多小时在加入新材料。

But for every hour spent organizing, two more hours are spent adding new material.

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