alluvial river

例句：

1. 1.The alluvial river is a natural wonder that has been shaped by centuries of erosion and deposition.
   冲积河是大自然的奇观，它是由数百年的侵蚀和沉积塑造而成的。
2. 2. The alluvial river flows through the valley, carrying sediment from the surrounding hills.
   冲积河流经山谷，携带着周围山丘的沉积物。
3. 3.The alluvial river provides important habitat for a variety of aquatic plants and animals.
   冲积河为各种水生植物和动物提供了重要的栖息地。