a submarine base

• 潜艇基地

a submarine base的用法和样例：

例句

1. If they could get control of the whole of Africa, if they had airfields and submarine bases at the Cape, it would cut Oceania in two.
   如果让他们控制了整个非洲，让他们取得好望角的机场和潜艇基地，大洋国就要切成两半。