cascade axis

例句：

1. 1. The cascade of leaves is a beautiful sight to behold.
   落叶的瀑布是一道美丽的风景。
2. 2.The cascade of water from the mountain was refreshing to the eyes.
   从山上流下的水令人眼睛一亮。
3. 3.The cascade of rocks on the riverbank creates a picturesque scene.
   河岸边岩石的瀑布创造了一幅如画的景象。