引介

例句：

1. 1. The teacher gave a brief introduction to the topic before moving on.
   老师在继续之前简要介绍了这个主题。
2. 2.She introduced herself as a writer and shared her latest book with us.
   她自我介绍为一名作家，并向我们分享了她的最新作品。
3. 3.In his introduction, he outlined the main points of the speech.
   在他的开场白中，他概述了演讲的主要要点。