That book has a preface, not a foreword.

那本书有序文, 没有前言。

He gave a rather disjointed account of his experience in the jungle.

"在谈到他在热带丛经历时,他话前言不对后语。"

The preface is complete in itself.

这前言本身就是完整。

The introduction is mainly about the definition of eponym, and emphasizing its development and synchrony with language.

前言要是名祖名词定义，阐述名祖名词发展和存在现状，并名祖名词始终与语言发展共时。