Dr.Brook says just one to two hours of breathing automobile exhaust in traffic can be deadly.

VOA: standard.2010.08.04

They are very aggressive to be type-A people who just simply made two extra hours out of their 24-hour day.

他们渴望成为上等人,甚至希望每天,能多过两个小时。

麻省理工公开课 - 媒体、教育、市场课程节选

If you're fighting for an hour or two hours, it just seems like that would be such a low number.

如果战斗持续了一两个小时,那这个伤亡数字可算是相当低了

耶鲁公开课 - 古希腊历史简介课程节选