引言包括对研究课题的说明、前人研究概况、选题目的和意义、研究方法与研究步骤等内容。

Introduction includes the contents such as proposition, overview of previous studies, the purpose and significances of the subject, research methods and research procedures.

youdao

一般的摘要不会多于200字，并且概括地介绍文章主要信息，包括引言，方法，结果和讨论。

The abstract is usually less than 200 words and provides basic information from the paper's major sections - introduction, methods, results and discussion.

youdao

包括引言与结论，本文分为五个部分。

This thesis is divided into five parts, including introduction and conclusion.

youdao