naked-flame mine

例句：

1. 1. The naked-flame mine is a source of energy that has been harnessed for centuries.
   裸火矿是一种被利用了数百年的能量来源。
2. 2.The mining industry relies heavily on the extraction of these resources from the naked-flame mines.
   采矿业严重依赖从裸火矿中提取这些资源。
3. 3. Due to its high value, the naked-flame mine has become a target for illegal mining activities.
   由于其高价值，裸火矿已成为非法开采活动的目标。