我专攻物理。
In my last year, I specialized in military law.
最后一年，我专攻军事法。
I specialized in the process of random number generation.
我专门研究随机数生成过程。
I specialized in English secretary studies at college.
我大学时专门学过英语文秘的课程。
Therefore, I have been studying English and the specialized knowledge in order to improve myself.
因此，我一直在学习英语和专业知识，以提高自己。
I is a company specialized in construction machinery sales and traditional Chinese painting.
我公司是一家专门从事工程机械销售及国画。
I is a company specialized in construction machinery sales and traditional Chinese painting.
我公司是一家专门从事工程机械销售及国画。
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