现年42岁的严已经成为了普林斯顿大学的一名顶尖生物学研究员。

Yan, 42, has become a leading biology researcher at Princeton.

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故事情节是这样的：严思(男)是一名机械学专业的德国大学生，他在中国遇到了建筑专业的中国女大学生燕燕。

According to the plot, Jens, a male mechanics student in a German university, met female Chinese architect student Yan Yan in China.

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四年前卫生部设立了自己的精神卫生行政机关，成员有三人，严(yan)医生任处长，是一名公共健康专家，而不是精神病学家。

The health Ministry's own mental health bureau, established four years ago, consists of three people. Dr. Yan, the director, is a public health specialist, not a psychiatrist.

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