After about half an hour, I do my homework for about two hours.
大约半个小时后，我大约两个小时做作业。
After two hours his game was about played out.
两小时以后，他所有的花招差不多要使完了。
Two hours were a long stretch of lounging about, after a long day's Labour.
在一整天劳动之后，还得一连两个钟头地游来荡去未免是太长了。
For men, this may occur after having five or more drinks in about two hours.
对于男性，估计在2小时内饮下不少于5瓶酒就可达到以上浓度。
For men, this may occur after having five or more drinks in about two hours.
对于男性，估计在2小时内饮下不少于5瓶酒就可达到以上浓度。
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