1. They have designed a system which pumps up water from nearly 1,000 feet below ground. 他们设计了一个能从地表以下1000英尺处抽水的系统。
2. Another way of countering drought is to have a limited amount of mass above ground and to have extensive root networks below ground. 对付干旱的另一种方法是在地面上种植特定数量的植物，并且确保地下有广大的根系网络。
3. The cables are buried one metre below ground level. 电缆埋在地平面下一米深的地方。
4. 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。
5. Merian noted how the ants took the leaves below ground to their young. 梅里安注意到了蚂蚁是如何把地下的树叶带到它们的后代那里的。
