Then how many hours of sleep should junior high school students get a night? The answer is nine.

那么初中学生每晚应该睡多少个小时呢？答案是9小时。

youdao

How many hours of sleep do you normally get?

每天通常睡多少小时？

youdao

Six, seven or eight — so how many hours of sleep are enough for you?

6小时，7小时还是8小时——一到底我们需要睡多长时间呢？

youdao

As part of the survey, the young people were asked how many hours of television or videos they watched daily.

VOA: special.2009.02.11

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

As part of the study, the young men and women were asked how many hours of television or videos they watched daily.

VOA: special.2009.03.10

The current law doesn't specify how many hours of practice new drivers have to complete.

WSJ: Driver's Ed, for Parents

Another innovation: a torque indicator showing how many hours of power were left before the spring would have to be rewound.

FORBES: Magazine Article

"I dread to think how many hours of my life I spent sitting in that corridor outside his office waiting for the nod to go in, " Hamilton told BBC Sport.

BBC: CHOOSE A SPORT