Why is he so often absent on Thursdays?

他为什么经常星期四缺席？

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He's often absent-minded.

他常常心不在焉。

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Grant's team found that those processes were often absent or not clearly detailed in the trials they reviewed.

Grant研究团队回顾后发现，他们试验过程中是常常缺乏这些程序，试验也没有详尽数据。

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Masonis claims that Parker was often absent, and when he was around, he was distracting.

FORBES: Billionaires List

But throughout the developing world teachers on the public payroll are often absent from school.

ECONOMIST: The Millennium Development Goals

In the Senate, where he served from 1959 to 1971, he seemed bored, and was often absent.

ECONOMIST: Eugene McCarthy