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
퇴행과정은 생물학적 진화의 반대 과정입니다.Toehang-gwajeong-eun saengmulhakjeok jinhwa-ui bandae gwajeong-imnida.De-evolution is the opposite process of biological evolution.