We know that memory consolidation can occur in sleep, but we also know that those extra hours studying can do some good.

我们都知道在睡眠时记忆会得到加深，但我们也知道多看几个小时的书裨益绝对不小。

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Abrahim had told him that it was dangerous to sleep alone, but he had also said that if he slept in the town he was certain to be beaten and arrested by the police.

亚伯拉罕告诉他单独露宿是非常危险的，但他也告诉父亲，如果他睡在镇里，那么肯定会被警察逮捕并且暴打一顿。

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Sleep also plays a role in test performance, but in two unexpected ways.

睡眠对考试成绩也有影响，但是有两种意想不到的方式。

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Foss considers it a joy to sleep in the same bed for a few nights, but also likes train travel.

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The researchers said that knowing more about the risks faced by people with the sleep disorder could not only help doctors to advise their patients, but also to work in the years to come to come up with ways to protect them.

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But we also rely on a certain order in our lives, a certain sense of security that lets us sleep safely in our beds and walk around our neighborhoods free from fear, and go about our daily lives without being the victims of crime.

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