He knew his subject from A to Z.

他通晓自己的学科。

《牛津词典》

To his surprise, he said, he became “passionate” about his subject.

他说，令他自己惊讶的是，他对自己的研究课题更加充满“热情”。

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Mr Bellos’s fascination with his subject is itself endlessly fascinating.

巴洛斯先生对本书的主题深深着迷，这一点本身就有无限魅力。

youdao

But the writer says it was his grandmother who really got him interested in this subject.

VOA: special.2009.10.12

Aristotle, in his Politics of course, tells us the most on this subject and often he is our source of information.

亚里士多德,在他的《政治学》中,告诉我们很多有关这个主题的知识,他经常也是我们信息的来源

耶鲁公开课 - 古希腊历史简介课程节选

So there, Machiavelli gives us a sense of the seriousness with which he approached his subject, and what it was he came to write.

从这些观点看来马奇亚维利,传达了,他对学习科目的严谨态度，他写作的来由。

耶鲁公开课 - 政治哲学导论课程节选

In Scientology, the auditor bears a significant responsibility for the progress of his subject.

NEWYORKER: The Apostate

He takes the clothing of his subject and creates miniature, art-sized versions of them.

FORBES: The Artist Who Wanted to Paint the Highway

In this collection, Mr Wood gives the impression of a critic overflowing his subject.

ECONOMIST: Literary criticism