preface

n. 序文,绪言,前言
v. 作序,写前言,以...开始

She prefaced her remarks with a few words of welcome to the guest.

她先讲了几句对客人表示欢迎的话作为开场白。

The preface of this diary recounted her life.

这本日记的前言叙述了她的生活。