She thought he came to the U. S. fully involved after learning of Dr. , but found himself seems to have become a nanny, the time spent on housework.

她以为自己来美国后可以全身心的投入博士学习中，却发现自己俨然成了一个保姆，时间都花在家务上。

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Meanwhile, she says less than 5% of families employ a nanny, and mothers do an average 18 more hours a week of housework than fathers, not including mental work like keeping track of appointments, documents and clothing sizes.

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