introduction与preface这两个名词均有“前言、导言”之意。
introduction : 普通用词，指任何作品开头对读者或听众说明或介绍该作品，起引导作用的结论部分，和全书内容是一致的。
- a brief introduction
简短的序言 - a book with an excellent introduction and notes
有精彩前言和注释的书 - By way of introduction , let me give you the background to the story.
作为引言，我先来介绍一下故事的背景。
preface : 指作者或编者为说明全书的目的、范围、编辑方法等在序言之前写的一段简短的序文。
- In his preface, the author says that he took eight years to write the book.
在前言中，作者说他写这本书用了8年。 - The preface of the book includes an account of the author's life.
该书前言记述了作者生平。
