挖坑道

例句：

1. 1. The miners are digging deep into the earth for more gold.
   矿工们正在地下挖掘寻找更多的黄金。
2. 2. The mine is dangerous and requires special training.
   矿井危险且需要特殊培训。
3. 3. The miner's tools are essential for extracting the ore.
   矿工的工具对于提取矿石至关重要。