A small place near a tree or a rock will be the warmest, but be careful before you decide where to sleep.

靠近树或岩石的小地方会是最温暖的，但是在你决定哪里睡觉之前要小心。

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While most people only think of movement to help a small child sleep, repeated movement or swing may help a full-grown adult.

虽然大多数人认为运动只是为了帮助小孩子睡觉，但重复的运动或摆动可能会帮助一个成年人。

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The researchers did a small study. They tested 18 young people who had good sleep after a sleepless night.

研究人员做了一项小型研究。他们测试了在一夜无眠后睡了个好觉的18名年轻人。

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Police in small towns often let him sleep in the town jail at night.

VOA: special.2009.01.14

Maciek Drejak, lead developer of Sleep Cycle, says the app does record small movements, but when analyzing your sleep patterns, it "filters" the ones it doesn't think are relevant.

WSJ: Smart Alarms Decide When You Should Really Wake Up

But then his mother had an outsize ambition: in a house too small for every member to sleep indoors, she wanted a nice kitchen.

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As in "Alien, " a small crew wakes up from cryogenic sleep.

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