People who awake in the middle of the night from sleep apnea are unable to complete normal sleep cycles, a time when the body naturally lowers hormone levels and blood pressure.

正常睡眠的时间里，人体能保持较低的激素水平和血压。而半夜由睡梦中因为呼吸暂停醒来的人就不能继续正常的睡眠周期。

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Enjoy a cup of coffee and a good book, and once awake, make time to work on the project of your choice.

享受一杯咖啡、一本好书，一旦你是醒着的，要把时间花在完成你所选择的项目上。

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People are better able to recall lists of related words and the connections between them after a night's sleep than after the same time spent awake during the day.

经过一夜睡眠后的人能比经过相同的白天清醒时间能更好地回忆起一系列的有关语句和它们之间的联系。

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In the month before the competition, he stayed awake for days at a time to finish the collection.

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Most travelers arrive in a new time zone, take a sleeping pill to fall asleep at bedtime, drink coffee during the day to stay awake, and wait it out until they feel better, says Charmane Eastman, a professor of behavioral sciences at Rush University Medical Center in Chicago, who has devised strategies for people seeking to minimize jet lag.

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In addition to keeping a prisoner awake, the simple act of remaining upright can over time cause significant pain.

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