geometric data of cascade

例句：

1. 1.The cascade of leaves is abeautiful sight in the autumn.
   秋天，落叶的瀑布是一幅美丽的景色。
2. 2. Thecascade of water from the mountain wasso loud that it drowned out allother sounds.
   从山上流下来的水声如此响亮以至于淹没了所有其他的声音。
3. 3.The cascade of rocks and boulders on the riverbank is areminder of the power of nature.
   河岸边岩石和卵石的级联提醒我们大自然的力量。