Small mirror: small mirror, round and round, watching baby, smile, shut sleep, to be a dream, become the moon, hanging days.

小镜子：小镜子，圆又圆，看宝宝，露笑脸，闭上眠，做个梦，变月亮，挂上天。

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I shut my eyes and tried to go to sleep.

我闭上了眼睛想睡。

《牛津词典》

Dolphins, as well as other marine animals, shut down one hemisphere of the brain when they go to sleep.

海豚，还有其他一些海洋动物，它们睡眠时会关闭大脑的一个半球。

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This allows the iPod to go to sleep and shut down when you shut your car engine, without you having to think about turning anything off.

ENGADGET: The Engadget Interview: Paul Griffin, CEO/founder of Griffin Technology

Over the past few days, I've been comparing the stock and Signature versions, and testing how much time it takes to set them up, start them and restart them in daily use, resume them from sleep, and shut them down.

WSJ: Microsoft Gives Windows a Clean Sweep

In the same way, they hibernate by going into torpor, they can do the same thing on a very short-term basis through the summer - if it is wet and windy and there is no food then they just shut down their body temperature and they just sleep it out.

BBC: Yorkshire bat colonies 'cohabit all year'