A topic, a subject, or an area of academic interest or specialization.
主题，范围一个题目、课题或学术兴趣或专业领域。
As a noun, the main area of interest treated in a work, esp. written: a book on the subject of love.
作名词，著作中的主题思想，尤其是在书面作品中，汉语表述“主题、主体、题材”：一本以爱情为主题的书。
A topic, a subject, or an area of academic interest or specialization.
一个题目、课题或学术兴趣或专业领域。
A topic, a subject, or an area of academic interest or specialization.
一个题目、课题或学术兴趣或专业领域。
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