submarinesn.潜艇名词submarine的复数形式.submarinen.潜水艇adj.海面下的submarine illumination水下照度submarine safety lanes潜艇安全航线submarine rs commander潜水艇指挥官submarine cargo vessel潜水货轮submarine cable laying海缆敷设submarine cable system海底电缆系统submarine patrol areas潜艇巡逻区submarine alluvial fan海底冲积扇submarine torpedo tube潜艇鱼雷发射器submarine physiography水下自然地理学