College students' thesis defense has the same opportunity as exams. If they fail to defend their undergraduate thesis and have a second chance to defend it, they can consult their teachers and make improvements according to their requirements.

The topics of thesis defense are all from the papers you wrote. Therefore, the knowledge points related to your thesis writing should be reviewed and deeply understood, especially the defense of master's thesis and doctoral thesis, which requires higher requirements and pays more attention to the depth and breadth of professional knowledge.