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- 李先生说他要专攻历史，他是决心认真干的。
Mr.Lee said he would major in history and he means business.
- 产科医生一个专攻产科医学的医生
A physician who specializes in obstetrics.
- 理疗学家专攻物理治疗学的医生
A physician who specializes in physical medicine.
- 我因法语考试不及格而决心专攻理科。
Having failed my French exams, I decided to concentrate on science subjects.
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