submarine's proceeding state with snorkel

例句：

1. 1.The submarine was able to dive down to the bottom of the ocean.
   潜艇能够潜入海底。
2. 2.The submarine's propeller is designed to move silently through the water.
   潜艇的螺旋桨设计成能够在水下悄无声息地移动。
3. 3.The submarine was used to explore the underwater world.
   潜艇被用来探索水下世界。