2. Preface: The first paragraph or two paragraphs are equivalent to the preface, generally explaining the background, reasons, significance and research purpose of the topic, and prompting the main points. As a preface, questions are generally raised, and the research scope, research methods and basic concepts can also be clearly defined in the preface.
3. Theory: This theory is the main part of the paper, and it is the part that focuses on expressing the research results. The analysis of the problem and the demonstration of the viewpoint are mainly carried out and completed in this part. The quality of a paper mainly depends on how well it is written. This part of the content is relatively large and complicated, and it is generally discussed at several levels. In order to achieve a clear hierarchy and clear context, this part is often divided into several large sections. These paragraphs are called logical segments, and a logical segment can contain several small logical segments, and a small logical segment can contain one or several natural segments, so that the text forms several levels. Each logical segment can have an appropriate title. Generally speaking, the level of a paper can be expressed in the form of a title and "(1)" in the order of "I", "I" and "1".
4. Conclusion: The conclusion is the last part of the paper, which is a summary of the content of the article. It usually includes two contents, that is, putting forward the demonstration results and pointing out the direction of further research, but it can be emphasized. The conclusion can also briefly explain and estimate the significance of the research results and its possible impact.