virgin coal

例句：

1. 1. The company is looking to switch to virgin coal for its new power plant.
   该公司正在考虑将其新的发电厂从煤炭转向原煤。
2. 2.Coal mining has been a major source of pollution in many parts of the world.
   煤炭开采在世界许多地方都是主要的污染源。
3. 3.The virgin coal mines are located in remote areas, making them difficult to access.
   这些原煤矿位于偏远地区，这使得它们难以到达。