In some duplicate checking software, quotations are usually included in the duplicate checking results. This is because these softwares do not distinguish between original words and quotations, but only regard all the words as the content that needs to be compared.

However, in many cases, the quoted words should not be included in the duplicate checking results. Because it refers to the original text of others, not the content created by the author of this article. The purpose of citing sources is to support the argument of this paper and highlight its contribution and innovation, rather than plagiarizing or copying the achievements of others.

Therefore, it is suggested to know the rules and requirements of duplicate checking software before submitting the paper. If the software will count the quoted words in the duplicate checking results, the author can provide a list of all the quoted contents, so that reviewers or editors can clearly understand which contents are quoted. In addition, the author can also mark the position of the citation in the paper to avoid misjudgment.