direct runoff

例句：

1. 1.The rainwater that falls on the roof will cause direct runoff to the gutter.
   落在屋顶上的雨水将导致直接流入排水沟。
2. 2.The city has implemented measures to reduce direct runoff from its streets.
   该市已采取措施减少街道的直接径流。
3. 3.The farmers have been working on a project to improve the soil's ability to absorb direct runoff.
   农民们一直在努力改善土壤吸收直接径流的能力。