cascade

n. 小瀑布
v. 瀑布似地落下
vi. 像瀑布般冲下或倾泻

The water formed a cascade down the mountain.

水沿山泻下，形成一条瀑布。

Climbing plants with their bright flowers hung in cascades over the garden wall.

开出鲜艳花朵的爬藤植物瀑布般悬挂在花园墙上。