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

You bring somebody in the sleep lab, you put electrodes on their scalp and you see what these-- what sort of electrical activities you get in the brain.

把人叫来睡眠实验室，把电极贴在他们的头皮上,你就能看到-,他们有什么脑电活动。

耶鲁公开课 - 心理学导论课程节选

You could have--you know, snuck into my house, watched my body go to sleep, get up in the morning, follow the body around over the course the day, see it go to sleep again.

你可以偷偷地，溜进我家，看着我的肉体入睡，早上又醒来，你可以跟着我的肉体整天到处跑，到晚上再看着它入睡。

耶鲁公开课 - 死亡课程节选

A new study found better results in four-year-olds who go to bed around the same time every night and sleep at least eleven hours.

VOA: special.2010.06.09

And then you do twenty-plus miles the next day,you sleep in a tent, you gotta wake up and you got to do it again.

VOA: special.2009.11.02

He died in his sleep in February,nineteen twenty-two, at the age of eighty-one.

VOA: special.2010.03.17

You can sleep on it.If you still feel like going in the morning, - I'll take you to the airport.- No. I want to drive.

VOA: standard.other