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
무생물시대의 환경은 생명체가 존재하지 않았다.musaengmul sidaeui hwangyeongeun saengmyeongchega jonjaehaji anhaetda.The abiotic environment did not have any living organisms.