selenitum

例句：

1. 1. The mine is producing a lot of selenitum.
   这个矿正在生产大量的硫磺。
2. 2.Selenitum is used in the production of fertilizers and pesticides.
   硫磺用于生产肥料和农药。
3. 3. The smelting process produces large amounts of sulfur dioxide,which can be harmful to the environment.
   冶炼过程会产生大量的二氧化硫，这对环境是有害的。