It rained solidly for three hours.
雨下了整整三个小时。
The flight takes approximately three hours.
飞行时间大约需要三小时。
It took her three hours to repair her bike.
她花了三个小时修理自行车。
At Fort Sumter, Major Robert Anderson and his men waited three hours before firing back at the Confederate guns.
VOA: special.2009.08.13
A studio of three hours' lecture in a large lecture hall, and two hours of recitation in groups of thirty.
在一个大的讲堂的教室里,讲三个小时讲座,并以三十人为一组,进行两小时背诵。
And if you are prepared to stand up for about two and a half to three hours to watch a play,
而且你要准备好了站上大约两个半小时到三个小时,去看一场戏剧,
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