potassium sulfate

例句：

1. 1.This salt is commonly used as a preservative in food.
   这种盐常用于食品中作为防腐剂。
2. 2. The potassium sulfate crystals are very useful for making soap.
   硫酸钾晶体在制作肥皂时非常有用。
3. 3. Potassium sulfate is also used to treat kidney stones.
   硫酸钾也用于治疗肾结石。