煤矿

1. 这个煤矿因矿源枯竭而被关闭。
   The mine was closed owing to exhaustion.
2. 有些煤矿不得不关闭。
   Some coal-mines had to shut down.
3. 矿井 * 虽然不常发生，但却是煤矿工人职业中的危险。
   Explosions, though infrequent, are an occupational hazard for coal-miners.

煤的英语翻译：

矿的英语翻译：