Please send the author's preface to the printer by Friday so the book stays on schedule.

請在週五前把作者的序言寄給印刷廠，讓這本書如期出版。

In the preface, our CEO thanks every employee who helped the company grow.

在序言中，我們的執行長感謝每一位協助公司成長的員工。

The training manual's preface explains how new hires should use each chapter.

這本訓練手冊的前言說明了新進員工該如何使用各章節。