erosive

海水的持续侵蚀对岩石产生了破坏性影响。

The continuous ___erosive action of seawater damaged the rocks over time.

海水对海岸线的侵蚀作用每年都在逐渐改变海岸线的形状。

The ___erosive action of seawater is gradually reshaping the coastline every year.