copper mining tailing

例句：

1. 1.The tailings from the copper mine are contaminated with heavy metals.
   铜矿的尾矿被重金属污染了。
2. 2.The tailings contain valuable minerals that can be recovered for use in construction.
   尾矿中含有有价值的矿物，可以回收用于建筑使用。
3. 3.The mining company is responsible for treating and disposing of the tailings safely.
   矿业公司有责任安全处理和处置尾矿。