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1·In April, 1841, he received his doctor's degree.

1841年4月，他获得了博士学位。

2·He has a doctor's degree.

他有博士学位。

3·When did Hawking get a Doctor's Degree of philosophy?

霍金是什么时候获得哲学博士学位的？

4·When did Hawking get his Doctor's Degree of philosophy?

霍金什么时候获得哲学博士学位的？

5·He is studying for a doctor's degree.

他正在攻读博士学位。

6·She received a doctor's degree.

他获得了博士学位。

7·He received a doctor's degree.

他获得了博士学位。

8·In 1992, he got his doctor's degree.

1992年，他获得了博士学位。

9·He took his doctor's degree at Harvard.

他在哈佛得了博士学位。

10·Velvet may only be used for a doctor's degree.

丝绒一般只用于博士学位。