Three people responded to the three-creation school competition. Defense is a Chinese word, pronounced dábiàn, which means to answer other people's questions and make excuses. Defend others' charges: The lawyer defended him in court. (2) Explain your own scientific research achievements or papers and answer experts' questions: thesis defense. (3) Procedural law refers to the defendant's or appellee's reply or excuse to the plaintiff's or appellant's claim and reason to the court. If the defendant or the appellee does not reply, the court can still hear the case and make a judgment. (4) Revise a form of self-discussion and related confirmation, such as graduation thesis defense.