I'd had three hours sleep the night before, and not much more the nights before that too.

昨天晚上我只睡了三个小时，再之前的几个晚上，我也没睡多长时间。

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Children who get less than nine hours sleep a night struggle at school, research has shown.

研究发现，睡眠时间少于九小时的孩子在校表现差。

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Scientists have found that you can double your chances of reaching your target weight if you get between six and eight hours sleep a night.

科学家们发现，如果你每天睡6到8个小时，你达到目标体重的机会就会加倍。

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Studies have shown that over time, most humans need eight to eight and a half hours of sleep for the best health.

VOA: special.2009.08.26

How many people here on average-- from the beginning of the semester until now get on average more than eight hours of sleep a night?

这里平均有多少人-,从开学到现在,平均每晚睡超过八小时的？

耶鲁公开课 - 心理学导论课程节选

I think for the past three months, I've only had five or six hours of sleep at night.

我觉得在过去三个月里，每晚我就睡5到6个小时。

I need 实战 - SpeakingMax英语口语达人

Study subjects who had less than seven hours of sleep were at greater risk than those who got eight hours of sleep a night.

CNN: Study: Can more sleep help fight off colds?

Andrew Lambourne, from the campaign group No More Night Flights, which demonstrated outside Luton town hall, said without controls in place "we will effectively only get five hours sleep".

BBC: Protesters outside Luton Town Hall

After a marathon session until well after midnight, Spain's finance minister suggested that the negotiators should get a few hours sleep, leaving the documents to be drawn up and signed thereafter.

ECONOMIST: Charlemagne