取代他的斯蒂芬·鲍文在去年五月刚飞过一次。

He was replaced by Stephen Bowen, who last flew in May.

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普林斯顿大学前校长威廉·鲍文认为，正是因为准备不足让学生们更容易在大学半途辍学。 威廉鲍文去年10月（译者加）刚与另外两位作者合作出版了一本关于大学毕业率的书。

This makes them more likely to drop out, explains William Bowen, a former president of Princeton, who co-wrote a book on completion rates.

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