Writing one is the aim of the hundreds of thousands of students who embark on a doctorate of philosophy (PhD) every year.

写一篇这样的东西，每年都有成千上万攻读博士学位的学子以此为目标。

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Learning the style and attitudes of an elegant person, he says, is like studying for a doctorate in philosophy at the Sorbonne.

他告诉我们，学习优雅人士的生活方式和态度，就像在巴黎大学攻读哲学博士学位。

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Davis also earned a master's degree and a doctorate in philosophy of religion.

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He studied physics at the University of California at Santa Barbara, worked as an electrician, and then earned a doctorate in political philosophy from the University of Chicago, although he found himself increasingly distracted by an ambitious motorcycle-rehabilitation project.

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