Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
사회부연은 사람들 간의 관계를 강화하는 데 중요하다.sahoe-buyun-eun saramdeul gan-ui gwangyereul ganghwa-haneun de jungyohada.Social expansion is important for strengthening relationships between people.