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
에너지론은 에너지의 변환과 사용을 연구하는 학문입니다.Eneojiron-eun eneojui byeonhwan-gwa sayong-eul yeongu-haneun hakmun-imnida.Energetics is the study of energy transformation and usage.