river run-off的用法和样例：
例句
- So, it is practical to use the sequential clustering and Markov model to forecast the river runoff.
这说明运用马尔可夫模型进行河径流量的丰枯状态预报是有效可行的。 - Every year, for example, a mother lode of nitrogen drains into the Mississippi River, mostly from agricultural lands, and pours into the Gulf of Mexico.
每年，密西西比河会有一条主河道不断的灌入氮元素，大部分都是从农业径流获得，最终流入墨西哥湾。
