n.[C]

1. 题目；话题；论题
   We have common topics to talk about.

   我们有共同的话题可谈。

2. 标题
3. 主题，要旨
4. 一般规则

n.

1. a subject of a text, speech, conversation, etc.
2. Linguistics  that part of a sentence about which something is said, typically the first major constituent.