submarine geomorphologic chart

例句：

1. 1.The submarine was equipped with advanced technology.
   这艘潜艇装备了先进的技术。
2. 2.The submarine was used for scientific research.
   这艘潜艇被用于科学研究。
3. 3. The submarine was a symbol of national pride.
   这艘潜艇是国家自豪的象征。