His doctoral dissertation on differential equations connected itself with existence theorems.

他论述微分方程的博士论文涉及到存在理论.

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He was involved in writing his doctoral dissertation.

他在聚精会神地写他的博士论文.

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Author, A . A . ( 1986 ). Dissertation title. Unpublished doctoral dissertation, University Name, Place.

作者 ( 年代 ). 论文名称. ○○大学○○研究所硕士或博士论文, 未出版, 大学地点.

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He was learned in books for the preparation of his doctoral dissertation.

为了准备博士论文,他博览群书.

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This doctoral dissertation is a monograph on Dai Dong - yuan " philosophy and some interrelated questions about it. "

本文即是对 戴东原 的义理思想及其相关问题的专题性研究.

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