1. (作品、谈话、讨论的)主题，题目
    A theme in a piece of writing, a talk, or a discussion is an important idea or subject that runs through it.

theme是什么意思

    e.g. The theme of the conference is renaissance Europe...
           大会的主题是文艺复兴时期的欧洲。
    e.g. 'That's another element in choosing a style of writing, you see,' he says, returning to his main theme...
           “瞧，那是选择写作风格时要考虑的又一个因素，”他又回到了主题上。

2. (艺术品、文学作品的)主题，中心思想
    A theme in an artist's work or in a work of literature is an idea in it that the artist or writer develops or repeats.

    e.g. The novel's central theme is the perennial conflict between men and women...
           小说的主题是男人和女人之间永无休止的冲突。
    e.g. This painting points to another recurring theme in Munch's work.
           这幅画体现了蒙克作品中另一个常见的主题。

3. (音乐的)主旋律
    A theme is a short simple tune on which a piece of music is based.

theme什么意思

    e.g. ...variations on themes from Mozart's The Magic Flute.
           莫扎特的《魔笛》中主旋律的变奏曲

4. (电影、电视节目、广播节目的)主题音乐，主题曲
    Theme music or a theme song is a piece of music that is played at the beginning and end of a film or of a television or radio programme.

    e.g. ...the theme from Dr Zhivago...
           电影《日瓦戈医生》的主题曲
    e.g. The BBC used Vangelis's Chariots of Fire as its Olympic theme tune in 1984.
           BBC 选用了范吉利斯的《火战车》作为其 1984 年奥运节目的主题音乐。