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
이 연합체적 구조는 여러 국가의 협력을 촉진합니다.i yeonhapchejeok gujo-neun yeoreo gukga-ui hyeobryeogeul chogjinhamnida.This federative structure promotes cooperation among several countries.