地下水——在土壤，岩石，或全湿地结构的地下水位下发现的地表水。
我们从峡谷上上方飞过。我们能够从表面磁场，极冠，地表下隐藏的水上方飞过。
1·Some ideas about simplifying the procedures of dynamic simulation analysis of combined operation of surface and subsurface water are presented for discussion.
文中对简化地面、地下水联合调度的动态模拟分析过程，提出一些看法供商榷。
2·The analytic method of dynamic simulation of combined operation of the surface and subsurface water and its application are presented in this paper.
本文阐述了地面水、地下水联合调度的动态模拟分析方法及其应用。
3·For the first time, the Huabei Oil Fields exploited the deep subsurface water below 400 meters in the centre area of Hebei during the middle of 70s.
七十年代中期，华北油田于冀中地区首次开发了400米以下深层地下水。