acid clay

例句：

1. 1. The acidic soil in the region is very suitable for growing certain types of plants.
   该地区的酸性土壤非常适合某些类型的植物生长。
2. 2. Acidic clay is often used as a building material due to its high porosity and strength.
   由于其高孔隙性和强度，酸性粘土常被用作建筑材料。
3. 3. In some regions, the use of acidic clay can be harmful to human health due to its high acidity.
   在某些地区，使用酸性粘土可能对人类健康有害，因为它的高酸性。