Graduate students typically take nine hours or less of coursework per semester, especially after the second year.
研究生每学期的课程不会超过九个学分。尤其研二以后。
The winner of a triathlon usually completes it in about nine hours but the Hoyts take much longer time.
铁人三项的获胜者通常需要在约9个小时内完成比赛，但霍伊特父子需要的时间远长于此。
The autopsy had taken about nine hours; analysis of the material gleaned will take years.
整个尸体剖检过程持续了大约9个小时，对收集到的材料进行分析则将需要数年时间。
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