Most paper duplicate checking systems can automatically identify and distinguish quoted content from copied content. Usually, the paper duplication checking system will automatically identify the cited part according to the content and format of the reference and mark it as a reference, which will not be regarded as plagiarism or plagiarism.

However, it should be noted that some paper duplication checking systems may not be able to accurately identify all the cited contents, especially when the quoted contents and formats are not standardized, which may be misjudged as plagiarism. Therefore, in order to avoid this situation, we need to quote the relevant content correctly in the paper and use the correct citation format.

At the same time, it should be noted that there may be differences between different paper duplicate checking systems, and the specific rules need to be judged according to the specific duplicate checking system. When using paper duplicate checking system, we need to use regular duplicate checking system, such as HowNet, paperfree, papertime, etc. , and carefully read the description and regulations of the system to understand its specific identification rules and threshold settings.