runoff producing rain

例句：

1. 1.The rainwater from the roof overflowed into the gutter.
   屋顶的雨水溢出到下水道里。
2. 2.The stream runs off the mountain and eventually reaches the sea.
   这条小溪从山上流下来，最终流入大海。
3. 3.The flood caused a significant amount of runoff in the valley.
   洪水在山谷造成了大量径流。