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
고생물학적 연구는 지구의 과거 생명체를 이해하는 데 중요하다.gosaengmulhakjeok yeonguneun jiguui gwageo saengmyeongchaereul ihaehaneun de jungyohada.Paleontological research is important for understanding the Earth's past life forms.