出ている is used when something have been out from somewhere. It consists from 出る and 〜ている.
beat> 피하다, 이해가 안되다?
助っ人> helper, supporter, second, backer?
물> 치료수단?
それは天国にあてた手紙だった。 >그것은 천국에 보낸 편지였다?