He wrote his doctoral thesis on electromagnetism.

他写有关电磁的博士论文.

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His doctoral thesis was on Algorithms and Data Structures for Dynamic Graphs.

他的博士论文是动态图表的算法和数据结构.

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My friend is writing her doctoral thesis.

我的朋友正在写她的博士论文.

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His doctoral thesis was'study of calcium phosphate cement ".

博士学位课题是《磷酸钙骨水泥可注射性相关研究 》.

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He is writing his doctoral thesis.

他正在写博士论文.

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My professor gave me a lot of helpful guidance while I was writing my doctoral thesis.

我的教授在我做博士论文的时候给了我许多有益的指导.

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