2. Abstract: It is an excerpt from the main content of the article.

3. Keywords or subject words: keywords are selected from the title, abstract and text of the paper, and are words with substantive significance to express the central content of the paper. Keywords are words used by computer systems to index the content characteristics of papers, which are convenient for information systems to collect and provide readers with retrieval. Generally, 3-8 words are selected as keywords for each paper, and a new line is set at the bottom left of the "abstract". Subject words are standard words. When determining the subject words, the paper should have a theme, and according to the indexing and collocation rules, it should be converted into standardized words in the subject glossary.

4. Paper body: (1) Introduction: Introduction, also known as preface, preface and introduction, is used at the beginning of the paper. The introduction should generally write the author's intention, explain the purpose and significance of the topic, and point out the scope of the paper writing. The introduction should be short and concise, and stick to the theme. (2) Text of the paper: The text is the main body of the paper and should include arguments, arguments, argumentation process and conclusions. The main part includes the following contents: a. Proposition-demonstration; B. analyzing the problem-arguments and arguments; C. solving problems-demonstration and steps; D. conclusion.