working with a basic slag

例句：

1. 1. The factory produces a lot of slag for the construction industry.
   这家工厂为建筑业生产大量的熔渣。
2. 2. The engineer had to deal with a lot of slag during the construction project.
   工程师在建设过程中不得不处理很多熔渣。
3. 3. The slag was used as a fertilizer in the farmland.
   这些熔渣被用作农田的肥料。