intro

前奏、开场口语

The song has a long guitar intro before the vocals start.

这首歌在人声进来之前有一段很长的吉他前奏。

介绍、简介口语

She gave a short intro before the speaker took the stage.

在讲者上台前，她先做了简短的介绍。

引言、绪论

Read the intro carefully before you start the first chapter.

开始读第一章之前，先仔细看完引言。

入门的、初级的口语

He signed up for an intro course in web design.

他报名了网页设计的入门课程。