The results of each repeated inspection system may be different. Because each duplicate checking system has its own unique algorithm and database, this may lead to different duplicate checking results in the same paper. In addition, if the database is updated or the algorithm is adjusted, it may also lead to the change of duplicate checking results.

It is suggested that the same duplicate checking system should be selected for multiple duplicate checking to obtain more accurate results. At the same time, we should also pay attention to choosing a reliable duplicate checking system to avoid missing inspection or misjudgment.