名词
中文翻译：序言内容
同义词：
['preface', "introduction例句：1. The book's prefatory matter is quite lengthy.（这本书的序言内容相当长。）2. The conference's opening was graced by the keynote speech.（会议开幕式上，主旨演讲受到了热烈欢迎。）"]
例句：
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1. The book's prefatory matter is quite lengthy.
这本书的序言内容相当长。
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2. The conference's opening was graced by the keynote speech.
会议开幕式上，主旨演讲受到了热烈欢迎。
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3.The presentation included a detailed prefatory matter about the project.
演示文稿中包含了关于该项目的详细序言内容。