hours

基本解释

This clock can only ring the hours.
这座钟只能每小时报时一次。
They credited me with three hours in history.
他们给了我三小时历史课的学分。
Two hours ago, they healed over and went out for dinner together.
两小时前他们停止了争吵，一起到外面吃晚饭去了。

Now,airlines will have to check the no-fly list within two hours of being told of additions, instead of twenty-four hours.
Another value for community learning we set up to have office hours, synchronized office hours, with the students and the professor.
学习社群的另一个价值,在于给学生和教授，制定办公时间，有规律的办公时间。
麻省理工公开课 - 媒体、教育、市场课程节选
you could maybe be speaking with a friend who talks about his long work hours and you are very surprised,
在你跟一个朋友聊天时，他谈起自己很长的工作时间，而你感到非常惊讶，
Do you ever课堂 - SpeakingMax英语口语达人

And yesterday, the questions to Paulson and Fed Chairman Ben Bernanke went on for five hours.
NPR: Senators Skeptical Of Bailout Package