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1、Three and a half hours.三个半小时。

2、然而，新型药物“Xyrem”可以让克莱尔处于深度睡眠，连续睡上三个半小时，所以在半夜她要再吃上一次药，保证自己可以有7个小时的深度睡眠。

3、However, the new drug, Xyrem puts Claire into a deep sleep for three-and-a-half hours so she must take a second dose in the middle of the night to get a full seven hours sleep.考试三个半小时从头至尾都能全神贯注的学生往往能取得很好的分数。

4、Students with the highest SAT scores concentrate best for the full three and a half hours.为了下载一张照片，我们当时花了三个半小时。

5、We waited three hours and a half to see the first to download the first picture.在经历了三个半小时的手术之后，我再次侥幸地活了下来。

6、But once again I beat the odds and survived the three and a half hours of surgery.。

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