Similarity rate and duplicate checking rate are two different concepts. Similarity rate refers to the degree of similarity or repetition between two or more articles, and duplicate checking rate refers to the proportion of repeating or quoting other documents in a paper.

Specifically, the similarity rate is an index to measure the similarity of two or more articles, usually expressed as a percentage. For example, if the similarity rate of two articles is 70%, it means that 70% of the contents of these two articles are similar. Similarity rate is very useful for detecting plagiarism, but it can't completely replace duplicate checking rate.

Duplicate checking rate is an index to measure the proportion of repeating or quoting other documents in a paper, usually expressed as a percentage. For example, the duplicate checking rate of a paper is 30%, which means that 30% of the content of this paper has been repeated or quoted. Duplicate checking rate is an important index to test the originality and academic integrity of papers, which is usually used to prevent academic misconduct.

It should be noted that similarity rate and duplicate checking rate are not the same concept, but they are related to some extent. If there is a lot of plagiarism in a paper, then the similarity rate and duplicate checking rate of this paper will be high. Therefore, when writing a paper, we should pay attention to the originality and academic integrity of the article and avoid plagiarism or plagiarism.