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
투열성은 물체가 열을 통과시키는 능력을 나타냅니다.Tuyeolseong-eun mulchega yeoreul tonggwahaneun neungryeogeul natanabnida.Diathermancy indicates the ability of a substance to transmit heat.