mountainous rivers

• 山区河流

mountainous rivers的用法和样例：

例句

1. And the Hyperbolic tangent function curve is used to simulate the ediments wide grading curve of the mountainous river.
   针对山区河流泥沙级配宽的特点，利用双曲正切函数曲线来模拟山区河流泥沙的宽级配曲线。