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
혁명력은 사회 변화를 이끌어낼 수 있는 힘입니다.Hyeokmyeongnyeogeun sahoe byeonhwareul ikeureonael su itneun himimnida.Revolutionary power is the force that can lead to social change.