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她在哪里攻读博士?

Where did she do her doctorate?

她儿子在国外攻读博士。

Her son is studying for a PhD abroad.

她是在哪里攻读博士学位的?

Where did she do her doctorate?

我准备明年开始攻读生物化学博士学位。

I am going to start my doctorate in biochemistry next year.

（博士学位）论文，（专题）论文，学术演讲长而正式的论文，尤指大学里由博士学位攻读者所写的论文；学位论文

A lengthy, formal treatise, especially one written by a candidate for the doctoral degree at a university; a thesis.