Fracking is the process of putting liquid into the ground to extract natural gas.

水力压裂是将液体放入地下以提取天然气的过程。

The energy giant Royal Dutch Shell has signed a deal with Ukraine to extract natural gas trapped underground in shale rock.

石油巨头荷兰皇家壳牌与乌克兰签署协议，该公司将开采页岩下的天然气。