英汉词典

1. 题目;话题；论题
    A topic is a particular subject that you discuss or write about.

topic

    e.g. The weather is a constant topic of conversation in Britain…
           在英国，天气是交谈中永恒的话题。
    e.g. The main topic for discussion is political union...
           讨论的主题是政治联合。