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
재방사는 물체가 에너지를 다시 방출하는 과정을 설명합니다.jaebangsaneun mulchega eoneojireul dasi bangchulhaneun gwajeongeul seolmyeonghamnida.Reradiation describes the process by which an object emits energy again.