Series cascade action

例句：

1. 1. The cascade of leaves is a beautiful sight to behold.
   树叶的级联是一幅美丽的景色。
2. 2.The cascade action of the river creates a calming effect on the surrounding area.
   河流的连续动作对周围地区产生了平静的效果。
3. 3. The cascade action of the water is so powerful that it can wash away even the strongest rocks.
   水流的连续动作是如此强大，以至于它可以冲走最坚固的岩石。