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
신빙하는 지구의 기후 변화에 대한 중요한 연구 주제입니다.Sinbingha-neun jigu-ui gihu byeonhwa-e daehan jungyohan yeongu jujimnida.Neo-glaciation is an important research topic regarding Earth's climate change.