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
해양학은 바다의 생태계와 물리적 특성을 연구하는 학문입니다.haeyanghak-eun bada-ui saengtaegye-wa mulrijeok teugseong-eul yeonguhaneun hakmun-imnida.Oceanography is the study of the ocean's ecosystems and physical properties.