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
고기후 연구는 지구의 기후 변화를 이해하는 데 중요하다.gogi-hu yeongu-neun jigu-ui gihu byeonhwa-reul ihae-haneun de jungyohada.Paleoclimate research is important for understanding Earth's climate changes.