rock oil

例句：

1. 1. The oil field is located in the rocky terrain of the northwest China.
   这个油田位于中国西北部的岩石地形中。
2. 2. The production of shale oil has become a major source of energy for many countries.
   页岩油的生产已经成为许多国家的主要能源来源。
3. 3.Bitumen oil is extracted from the bitumen deposits found in the shale formations.
   沥青油是从页岩沉积中发现的沥青矿床中提取出来的。