potassium indium alum

例句：

1. 1.Potassium is essential for plant growth.
   钾对植物生长至关重要。
2. 2. Indium is used in electronics to improve the conductivity of materials.
   铟用于电子工业，提高材料的导电性。
3. 3. Aluminum is a lightweight, strong metal that is widely used in construction and manufacturing.
   铝是一种轻质、强度高的金属，广泛应用于建筑和制造业。