n.潜艇；海底生物；adj.水下的，海底的；vt.用潜艇攻击；vi.驾驶潜艇；划入底下； 变形： 复数：submarines过去式：submarined过去分词：submarined现在分词：submarining第三人称单数：submarines 双语释义：n.(名词)[C] 潜艇 naval vessel that can operate underwater as well as on the surfaceadj.(形容词)[A] 海底的，水下的 existing or situated unde