1. "비오면 비 맞아야 된답니다" => They say if it rains, you have no choice but to stand in it. * -답니다 is short for -다고 합니다 = it is said that ... (it relays a saying or general knowledge) * -면 = if ... (expresses a condition) * -야 된다/한다 = (you) must/should (do something). 비(를) 맞다 means to stand in the rain getting yourself wet(맞다 = to be exposed to, to be hit by something). So the sentence doesn't quite match the situation you mentioned What you described can be said like 비(가) 오면 스타디움 문을 일찍 연답니다 (They say the stadium opens its doors earlier if it rains), or 비(가) 와서 스타디움 문을 일찍 열었답니다(They say the stadium opened its doors earlier because it rained). 2. 좀 고급스러운 말로 민소매 티(이다) = In somewhat high-brow words, (it's a) "sleeveless T shirt". * 고급스럽다 = is high class; high-brow. * 민소매 = sleeveless. * 긴소매(long sleeve) and 반소매(half sleeve). * 티 = colloquial abbreviation of 티 셔츠 (T-shirt). The sentence is a little odd though, since 민소매 is not a special word at all as far as I know.