온실효과, 유효복사레벨(EPL), 복사강제력

New channel 윤린 기계공학의 다양한 세상: title sample judged 'whole' (This is an honest mechanical/thermal engineering teaching channel with nearly every long upload being a structured lectu); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.