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
인륜대사는 인류의 미래를 결정짓는 중요한 문제입니다.inryun daesa-neun inryu-ui mirae-reul gyeoljeongjitneun jungyohan munje-imnida.Great human affairs are important issues that determine the future of humanity.