地表水

例句：

1. 1. The groundwater ispumped from the aquifer tosupply water for irrigation.
   地下水被从含水层抽出来用于灌溉。
2. 2.The aquifer is located beneath thesurface of the lake.
   含水层位于湖泊表面之下。
3. 3. The aquifer iscritical for sustaining the local ecosystem.
   含水层对维持当地生态系统至关重要。