submergence of ground

例句：

1. 1.The ship sank beneath the waves.
   船在波浪中沉没了。
2. 2. The flood caused a great deal of damage to the city.
   洪水给城市造成了巨大的损害。
3. 3. The boat was completely submerged in the water.
   船完全被水淹没了。