And they will study whether it is involving in controlling sleep quantity alone, or also what scientists call the "wakefulness-behavioral drive."

VOA: special.2009.08.26

When you're in dreamless sleep, you're not imagining or experiencing anything.

当在无梦的睡眠中时，你没有想象或者体验任何事。

耶鲁公开课 - 死亡课程节选

I think for the past three months, I've only had five or six hours of sleep at night.

我觉得在过去三个月里，每晚我就睡5到6个小时。

I need 实战 - SpeakingMax英语口语达人

The tension of stress can interfere with sleep or cause anger or sadness.

VOA: special.2009.03.24

There is slow-wave sleep or "quiet sleep."

第一种是慢波睡眠，“安静的睡眠”

耶鲁公开课 - 心理学导论课程节选

Then the old man and woman held the rain babies in the palms of their hands or they rocked them to sleep in a pair of wooden shoes.

VOA: special.2009.02.28

00 Now I say while i is less than or equal to 100, I write my code, I sleep for a second.

现在我指明当i小于等于，我写下我的代码，我休眠一分钟。

哈佛公开课 - 计算机科学课程节选

Using a combination of technology and pharmacology, he exploits a technique that brings Cobb and his team into a client's or victim's sleep to search out personal or business secrets.

VOA: standard.2010.07.16