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So far, research suggests it may be possible to learn about the tone and pronunciation of a language or even the meaning of words while sleeping, although it is to a weaker level than what we do during the day without noticing.

到目前为止，研究表明，在睡觉的时候学习一门语言的语调和发音，甚至是单词的意思是可能的，尽管这比白天无意识学习的效果要差。

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They also suggest actions like providing protective boots to wear while working in fields, and not sleeping on the ground.

VOA: special.2010.01.25

So, one of the bizarre side effects is some people with Ambien while sleeping go downstairs, open up their refrigerator and eat huge amounts of food.

服用安必恩的其中一个副作用,就是梦游走下楼，打开冰箱，吃一大堆东西。

耶鲁公开课 - 心理学导论课程节选

And so it's really just this kind of rumination and you could do this while you're sleeping.

这其实只是一种思考,大家睡觉时也可以思考。

耶鲁公开课 - 心理学导论课程节选

Apnea testing measures how many times per hour you stop breathing while sleeping.

WSJ: A Test for Sleep Apnea From Your Own Bedroom

In a second part of the study, the researchers collected T-shirts worn by fathers and their children while sleeping.

ECONOMIST: There is a benefit in looking like dad

Seldom did we lock the boat when we left for short periods during the day and never while sleeping at night.

WSJ: Best Places to Retire: How to Retire to the Open Sea