The latter is the main subject.

后者是主要的主题。

youdao

That poor ant is the main subject of our radio story.

可怜的蚂蚁是我们广播故事的主要人物。

youdao

Autobiography is the main subject in Life Studies.

自传成为《生活研究》的中心话题。

youdao

And,he said the real reason officials removed the video is because of the exhibit's main subject,gay love.

VOA: special.2010.12.15

The day's main debate is led by the Democratic Unionist Party, on the subject of suicide prevention in the UK. While over in Westminster Hall (from 9.30am) there are more backbench debates - watch out for the 11am debate on tax transparency in FTSE 100 companies - led by the Conservative Stephen McPartland.

BBC: Week ahead

For students, the main attraction of the subject is getting a qualification with hard-currency clout.

ECONOMIST: The way to save minority subjects

Ignorance is not an excuse, but it seems to be the central theme for Michael Wallerstein, the main subject of the article.

FORBES: Should Law Schools Tell Applicants About The Dismal Jobs Picture?