Read a book on a new subject.

读一本关于某一门新学科的书。

youdao

I have slight knowledge on the new subject.

我对这门新学科粗通一二。

《新英汉大辞典》

He asked a question which opened up a new subject.

他问了一个问题，引出了一个新的话题。

youdao

But now,a new subject became more important in his work.

VOA: special.2010.07.25

But then Machiavelli goes on to tell the reader that the exclusive subject of this book will be the new prince.

但马奇亚维利,马上又告诉读者,本书的唯一主角,是新君王。

耶鲁公开课 - 政治哲学导论课程节选

In the works that Milton is going to be publishing now with greater and greater frequency, it's this Spenserian ideal of marriage that will be the new and, believe me, the endlessly complex Miltonic subject.

在弥尔顿准备出版的作品中,越来越常出现的，是斯宾塞式的婚姻理想，那将是崭新的，相信我，也是无尽而复杂的弥尔顿风格的题材。

耶鲁公开课 - 弥尔顿课程节选

Trace-A-Face or You Draw, challenges the player to draw a new subject every day.

ENGADGET: Samsung adds more S-Pen friendly apps for British Galaxy Note 10.1 users

The question is whether the so-called New Wave directors can move on to new subject matter.

CNN: CINEMA

It's a new new subject, new question, and it has to do with President Putin and Russia.

NPR: Transcript of Presidential Debate