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
배종설은 질병의 원인을 미생물로 설명합니다.Baejongseol-eun jilbyeong-ui wonin-eul misaengmul-lo seolmyeonghamnida.Germ theory explains the causes of diseases as microorganisms.