Do not write formulas. According to official website of CNKI China Knowledge Network, the main purpose of ppt for graduation thesis defense is to show the research results and explain the research methods. The formula is a part, and the formula is only a part. There is no need to show the research results in the formula, so there is no need to write related formulas. Thesis is a common Chinese word in classical literature, which means to talk or exchange ideas. Contemporary papers are often used to refer to research in various academic fields and describe academics.