论文前言用英语怎么说英文翻译 Preface 重点词汇 前言───preface;论文───paper 双语使用场景 The old scientist wrote the preface to the author's new book.───老科学家为自己的新书写了自叙. The whole paper consists of three parts are preface, text, conclusion.───全文由引言 、 正文 、 ...