https://blog.gongquiz.com/2021/05/03/%ec%a7%81%ec%97%85%ec%83%81%eb%8b%b4%ec%9d%84-%ec%9c%84%ed%95%b4-%eb%a9%b4%eb%8b%b4%ec%9d%84-%ed%95%98%eb%8a%94-%ec%a4%91-%ec%a6%89%ec%8b%9c%ec%84%b1immediacy%ec%9d%84-%ec%82%ac%ec%9a%a9%ed%95%98/