She was a person accustomed to having eight hours' sleep a night.

她是那种习惯每晚睡八个小时的人。

《牛津词典》

Eight hours of sleep a night is necessary for all of us.

每晚八小时的睡眠对我们所有人都是必要的。

youdao

Humans Need eight Hours sleep a Night: There are many ways of sleeping and few cultures sleep in eight-hour consolidated blocks like we do.

人每天晚上需要八小时的睡眠：我们有很多种睡眠方式和少数几种睡眠文化传统，就像大多数人每天要连续的睡八小时。

youdao

Adults should try to get seven to eight hours of sleep a night.

VOA: special.2010.06.09

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

For the study, very short sleep patterns were defined as less than five hours a night, short sleep was five to six hours a night, standard sleep was seven to eight hours, and long sleep was nine or more hours a night.

CNN: Does your diet influence how well you sleep?

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?

According to the National Institutes of Health, most adults need seven to eight hours of sleep a night.

CNN: Caffeinated moms drink up to keep up