fouled sulfuric acid

例句：

1. 1. The factory produces a lot of fouled sulfuric acid for the chemical industry.
   这家工厂为化工行业生产大量的污酸。
2. 2.The engineer used this fouled sulfuric acid to dissolve the rust on the metal parts.
   工程师使用这种污酸来溶解金属部件上的锈。
3. 3.The pollution from the factory has made the water in the area fouled sulfuric acid.
   工厂的污染使该地区的水变得污酸。