矿井口

例句：

1. 1. The miners were working inthe mine shaft when a gas explosion occurred.
   矿工们在矿井里工作时发生了瓦斯爆炸。
2. 2.The mine shaft was filled with water andmud.
   矿井口被水和泥填满了。
3. 3. The miners had to work inthe mine shaft for several days before theycould safely exit.
   矿工们不得不在矿井里工作几天才能安全地离开。