1. The meaning of the paragraph should be clear. Generally, a paragraph should have a main meaning, that is, the main idea. When constructing a paragraph, please tell the reader clearly.

2. The meaning of paragraphs should be unified. A paragraph should concentrate on expressing one meaning, and don't write sentences irrelevant to the purpose of the paragraph into the paragraph.

3. This paragraph should be complete. A paragraph should express its relatively complete meaning clearly, otherwise it will easily lead to confusion in the structure of the article.

4. The paragraph length should be moderate. Moderate paragraph length is a condition to improve the overall effect of the article, which should be determined according to the length of the article, the nature of the paragraph, and especially the need of ideographic expression.

In short, paragraphs with clear meaning, unity and integrity and moderate length are the basic requirements for the construction of academic papers, and paragraphs that fully meet these requirements are standardized paragraphs, referred to as standardized paragraphs.