前言的英文：
preface
forward
introduction

参考例句：

He had to swallow his words.
他不得不取消前言。

That book has a preface.
那本书有前言。

Preliminary remarks
序(文),前言

IEC/ISO foreward
IEC/ISO前言

The preface of the book includes an account of the author's life.
该书前言记述了作者生平。

The preface of the book includes an account of the author's life
该书前言记述了作者生平。

That book has a preface, not a foreword.
那本书有序文，没有前言。

The preface is complete in itself.
这前言本身就是完整的。

She withdrew her previous remarks, and apologized.
她收回前言并道了歉。

He wrote a preface to the play.
他为剧本写了前言。

preface是什么意思：
n. 前言，引语
v. 作序，以…开始

That book has a preface, not a foreword.
那本书有序文，没有前言。

The preface is complete in itself.
这前言本身就是完整的。

The accident was the preface to a great scientific discovery.
这一偶然事件成了一项重大科学发现的开端。

forward是什么意思：
adv. 向前；今后；提前；出来；
adj. 前面的；早的；提前的；鲁莽的，冒失的；热心的
n. 前锋
v. 转交；发送，递送；促进，助长

To go forward at all is to go forward together.
要前进就大家一起前进。

advance (=put forward) a claim
提出要求

She made a forward remark.
她讲了一句冒昧的话。

introduction是什么意思：
n. 介绍；引进；采用；序言；入门；序曲

This is an Introduction to Biochemistry.
这是本《生物化学入门》书。

Listen to the introduction!
快听这首序曲！

This is a descriptive, not an evaluative introduction.
这是一份描述性的，而不是评量性的介绍。