绪言部分概要介绍了本文的选题缘起、界定了研究对象，并简要说明了本文的重点、难点。
In the preface, it introduces the origin of selecting the topic, limits the object to be studied and briefly narrates the key points and difficulties in the paper.
绪言中包含她对那些帮助过她的人的致谢声明。
The preface contained an acknowledgment of those who had helped her.
绪言论述了本文选题的目的、意义以及研究的重点所在，并对本文所涉及的研究对象做了简要的学术回顾。
The purpose of the selection of subjects discussed in this paper, as well as the research focus, and this study involved a brief academic review.
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