https://www.syu.ac.kr/blog/%ec%b7%a8%ec%97%85%ec%a7%80%ec%9b%90%ec%84%9c%eb%b9%84%ec%8a%a4-%ec%9e%90%eb%a3%8c-%ec%a0%9c%ea%b3%b5-%ec%95%88%eb%82%b4-5/%ea%b5%ac%ec%9d%b8%ec%a0%95%eb%b3%b4%ec%84%9c%ec%9a%b8%eb%b6%81%eb%b6%80%ea%b3%a0%ec%9a%a9%eb%b3%b5%ec%a7%80%ec%84%bc%ed%84%b0-2022-12-01-_1/