https://www.syu.ac.kr/blog/%eb%8c%80%ea%b5%ac%ec%b2%ad%ec%86%8c%eb%85%84%ec%a7%80%ec%9b%90%ec%9e%ac%eb%8b%a8-2021%eb%85%84-%ec%83%81%eb%b0%98%ea%b8%b0-2%ec%b0%a8-%ec%a7%81%ec%9b%90-%ec%b1%84%ec%9a%a9-%ec%9e%ac%ea%b3%b5%ea%b3%a0/%eb%b6%99%ec%9e%84-2-%ec%a0%9c%ec%b6%9c%ec%84%9c%eb%a5%98-%ec%96%91%ec%8b%9d%ec%9e%ac%ea%b3%b5%ea%b3%a0/