许多树木部分被淹没在水中。

Many trees are partly ___submerged in the water.

洪水过后，整个村庄都被淹没了。

After the flood, the entire village was ___submerged.

他完全沉浸在研究中，忘记了时间。

He was ___submerged in his research and lost track of time.