It appears that most freshwater life did not originate in fresh water, but is secondarily [______], having passed from ocean to land and then back again to fresh water.
동의어 · adjust, acclimate, suit파생어 · adaptation(적응)
★ 주제문 — S3·S4·S5이(가) 이 문장을 떠받칩니다 — S1을(를) 맥락(으)로 뒷받침