alum clay

例句：

1. 1. The potteruses alum clay to make pottery.
   陶工使用黏土制作陶器。
2. 2. Aluminium is a typeof metal that is used in the productionof aluminum alloys.
   铝是一种用于生产铝合金的金属类型。
3. 3. Theclay was carefully mixed withwater and then molded intothe desired shape.
   泥土被小心地与水混合，然后被塑造成所需的形状。