https://www.syu.ac.kr/blog/%e3%80%8c%ec%84%9c%eb%8c%80%eb%ac%b8tv-%ec%98%81%ec%83%81-%ed%81%ac%eb%a6%ac%ec%97%90%ec%9d%b4%ed%84%b0-2%ea%b8%b0-%ea%b3%b5%eb%aa%a8%ec%a0%84%e3%80%8d/%ec%84%9c%eb%8c%80%eb%ac%b8%ea%b5%ac%ec%b2%ad-%ed%81%ac%eb%a6%ac%ec%97%90%ec%9d%b4%ed%84%b02%ea%b8%b0-%ea%b3%b5%eb%aa%a8-%ed%8f%ac%ec%8a%a4%ed%84%b0/