With the global energy scarcity, the exploration of undergroundresource is pushed into the spotlight.
目前全球能源紧张，地下资源的勘探成为焦点。
2
So, water enterprises need a set of effective and convenient methods to manage the water supply network which is valuable undergroundresource in cities.
为此，企业需要一种方便、高效的方式来管理城市宝贵的地下资源——自来水管网。
3
And unlike underground oil reserves, biofuels are a renewable resource since we can always grow more crops to turn into fuel.