[짤막상식] 잠 못 드는 밤, 열대야란? / YTN YTN 0 36 08.01 01:18 https://www.youtube.com/watch?v=2mS9nKVzHI0 + 11 https://www.youtube.com/feeds/videos.xml?channel_id=UChlgI3UHCOnwUGzWz… + 9 [짤막상식] 잠 못 드는 밤, 열대야란? / YTN