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
맬서스 주의의 이론은 인구 증가에 대한 경고를 포함합니다.maelseoseu juuiui ilron-eun ingu jungga-e daehan gyeonggo-reul pohamhamnida.The Malthusian theory includes warnings about population growth.