Subterranean

The underground infrastructure consists largely of cables and pipes. These are vital to the functioning of our society. But these pipes are not evenly distributed over the substrate: per area there are more/less pipes, more/less vital, different types, other diameters, more/less prone to damage and the like.地下基础设施主要由线缆与管道构成，是维系社会正常运转的核心支撑。但此类管线并非均匀分布于地表下层：单位面积内的管线数量多寡不一，重要性程度各异，类型、管径各不相同，损坏风险高低有别，诸如此类。