So, it could be that you're deciding, as a lawyer, how many hours you're going to spend on the job.

比方说你是个律师,你就要计划好为公司工作多长时间

耶鲁公开课 - 博弈论课程节选

How many hours do the students take classes usually?

学生们通常上几小时的课？

很好奇住宿生活 - SpeakingMax英语口语达人

How many hours do you study every day?

你每天要学习几个小时？

关于学校生活 - SpeakingMax英语口语达人

How many hours do you work a day?

你一天工作几个小时？

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How many hours are you working?

你工作多少个小时？

It sounds like 实战 - SpeakingMax英语口语达人

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