why,when we do not sleep, we do not function well. We just do not know much about sleep at all."

VOA: special.2009.08.26

I didn't sleep well last night.

昨晚我没睡好。

I didn't 课堂 - SpeakingMax英语口语达人

Well, should we conclude, therefore, so nobody really believes that they're ever in dreamless sleep?

那么我们就应该得出结论，没有人真正相信,他们可以进入无梦的睡眠么？

耶鲁公开课 - 死亡课程节选

"They found that men can experience up to a three-fold increased risk of stroke, and that risk seemed to be well correlated with the severity of sleep apnea."

VOA: special.2011.05.04

Well, first there's a distinction, a distinction between real dreams versus sleep thought.

首先，我们要区分，真正的梦和半睡半醒的想法。

耶鲁公开课 - 心理学导论课程节选

He says a primary function of the home is to give migrants a safe place to sleep and something to eat as well as to provide them with information about the dangerous journey ahead.

VOA: standard.2009.09.01