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
외분비학은 외부로 분비되는 물질을 연구하는 학문입니다.oebunbihak-eun oeburo bunbidoeneun muljil-eul yeonguhaneun hakmun-imnida.Exocrinology is the study of substances secreted externally.