Two and a half hour 个半小时
For junior-high students, it should be "no more than an hour and a half", and two for high school students.
对于初中生而言应该是“不超过一个半小时”,对于高中生则应该是两个小时。
Most people spend about half an hour at a time, and two hours total.
大多数人一次性花半小时,分四次共两个小时。
Seattle is only a two and a half hour drive south and San Francisco is a two-hour flight away.
西雅图在这儿往南仅两小时半车程的地方,圣弗朗西斯科距此则是两小时飞机的路程。
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