coal reserves

例句：

1. 1.The company has a significant amount of coal reserves in the region.
   该公司在该区域拥有大量的煤炭储备。
2. 2. The coal reserves are expected to increase significantly in the coming years.
   预计未来几年煤炭储备将显著增加。
3. 3.The government is working on developing new technologies to extract more coal from the reserves.
   政府正在努力开发新技术，以从储备中提取更多的煤炭。