在他们2017年发表在《自然——通讯》上的研究中，参与者能够分辨出他们在睡觉时所听到的声音特征。

In their 2017 study published in Nature Communications, participants were able to pick out sound features that they had heard during sleep.

youdao

他们在睡觉的时候很清醒，到了该起床的时候很困倦，这可能与他们的身体有多疲劳，或者需要多少睡眠才能消除疲劳无关。

They are alert at bedtime and sleepy when it is time to get up, and this may have nothing to do with how fatigued their bodies are, or how much sleep they must take to lose their fatigue.

youdao

我朝他们看过去，他们在睡觉。

I looked over at them. They were sleeping.

youdao

I've found some people really have to come to the first and second row because they claim that if they don't hear me they cannot really go to sleep.

我发现有些人必须得在第一,二排睡觉,因为他们说如果听不到我的声音,他们就无法入睡

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