The aquifers range from 1,000 to 3,000 feet below the ground, which means that pumping will be expensive and there are other concerns.
地下含水层位于地下1000到3000英尺之间,这意味着抽水成本很高,还有其他接踵而来的问题。
of which seven were below the ground.
其中有七层楼是建在地下的。
The local limestone is so porous that all the rainwater immediately sinks below ground.
当地的石灰岩如此多孔以致所有的雨水很快渗到地下。
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