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
물질학은 물질의 구조와 성질을 연구하는 학문입니다.Muljilhak-eun muljil-ui gujo-wa seongjil-eul yeonguhaneun hakmun-imnida.Material science is the study of the structure and properties of materials.