Sleep experts say that if you feel groggy or tired during the day, feel the urge to nap, or if you fall asleep within five minutes of lying down, you could possibly be sleep-deprived.

睡眠专家们说如果你整天都感觉昏昏沉沉或疲惫不堪，很想要打个盹儿，或者是你躺下来五分钟内就去见了周公，你很可能已经处于睡眠剥夺的状态了。

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You'll never be able to sleep.

你别想睡觉了。

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"It must be a healthy place to sleep," she said, looking out through the window.

“那一定是一个健康的睡觉的地方。”她望着窗外说。

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It says they should be placed on a separate sleep surface from their parents,without blankets, pillows or other soft bedding.

VOA: special.2009.08.26

It has to be said that the young Milton lost a lot of sleep over this passage.

必须说的是,年轻的弥尔顿为了这些文章放弃了很多睡眠。

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So if I sleep more, I think I'll be more happy and more productive.

所以，如果我补充睡眠的话，我想我会心情舒畅，干活也更有效率。

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It was also once thought to cure toothache and be a sleep aid if taken as a cup of tea.

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It could be that sleep problems lead to changes in the brain, which, in turn, contribute to the psychiatric illnesses, they say.

WSJ: How Much Sleep Do Children and Teenagers Need? Grown-Up Problems Start at Bedtime

While Big Ten football is turning out to be as sleep-inducing as whatever Rip took before nodding off, it's impossible to deny that the ND defense is for real.

WSJ: Florida State, Notre Dame Roll: College Football's Throwback Weekend