We experience some deep, quiet sleep and some active sleep, which is when dreams happen.

我们会经历一些深层且安静的睡眠以及一些活跃的睡眠，而活跃的睡眠时期正是做梦的时候。

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You might think sleepwalking would happen during active sleep but a person isn't physically active during active sleep.

你可能认为梦游会发生在动态睡眠中，但一个人在动态睡眠中身体并不活跃。

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Throughout the night, people alternate between passive and active sleep.

整个夜晚，人们被动和主动之间轮流睡觉。

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Helping patients stay healthy: A growing number of mobile apps and gadgets aim to help people stay active, sleep well and eat healthy.

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And she suspects the fresh air and active play help both kids sleep better.

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"Everything we already know about fighting off chronic disease, like getting sufficient sleep, staying active throughout life, and having a healthy diet" may stave off premature aging of the immune system, too, Epel said.

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