他在前言中简要叙述了日记发现的经过。

He prefaced the diaries with a short account of how they were discovered.

《牛津词典》

在前言中，作者提到了他的妻儿。

In the foreword, the writer mentions his wife and children.

youdao

作者在前言中陈述了自己写书的意图。

In the preface the author states his intentions in writing the book.

youdao

The law code of Hammurabi is available to us and there's a preface to it in which he basically explains why you should obey the rules that he now is laying down for you.

汉莫拉比法典为我们提供了证据,汉莫拉比在法典的前言中向我们解释了,为什么要遵守他颁布的法律

耶鲁公开课 - 古希腊历史简介课程节选