At about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.

在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。

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But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.

但在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。

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Create a routine for the children -especially sleep time.

为孩子们规定日常事务——特别是睡觉时间。

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At the time, scientists believed that a person at the top of the mountain would only have enough oxygen to sleep.

VOA: special.2010.06.30

But really, the computer's just so fast I'm drawing the same string with just a slightly different number again and again after going to sleep one second at a time.

但是真实地，这个计算机到现在为止,我一次又一次用稍微不同的数字,绘画了相同的字符串,在睡眠1秒钟之后。

哈佛公开课 - 计算机科学课程节选

We are living in very unusual times and I am sure that Ben Bernanke and other central bank presidents are losing sleep right now because this is a time to challenge monetary policy makers.

我们现在正生活在一个非常特殊的时期,并且我很肯定本？伯南克,和其他中央银行行长们,正在日夜担忧，因为,现如今是一个挑战货币政策制定者的时代。

耶鲁公开课 - 金融市场课程节选

Vanda Pharmaceuticals said the trial would last six months and aim to show an improvement in total sleep time.

FORBES: Helping Blind Patients To Sleep

High school students in particular are facing greater academic pressure and college competition than ever before, and all those AP classes and extracurricular activities can eat into sleep time.

CNN: Sleep deprivation linked to depression in teens

Before your trip, your doctor can advise whether melatonin is a good option for you and if so, the appropriate amount to take and when to take it (usually about an hour before the desired sleep time and either upon your return, during your trip, or both).

CNN: Can melatonin prevent jet lag?