In the paper version of the paper, teachers may judge the originality and plagiarism of the paper through their own knowledge and experience. However, in order to detect plagiarism more accurately, teachers may use some online duplicate checking tools or professional literature detection software for further inspection. These tools and software can compare the words and quotations in the paper with the existing literature database and find the content with high similarity. Teachers can check the copies of papers to ensure their originality and academic integrity.