slag coverage

例句：

1. 1. The construction site was covered in a thick slag blanket.
   施工现场被厚厚的渣滓覆盖。
2. 2. The slag layer is an important source of raw materials for the mining industry.
   渣滓层是采矿业的重要原材料来源。
3. 3. The slag coverage is necessary to prevent soil erosion and protect the environment.
   渣滓覆盖层是防止土壤侵蚀和保护环境的必要措施。