clay treating

例句：

1. 1. The engineer treated theclay with water and sand to make itstronger.
   工程师用水和沙子处理粘土，使其变得更坚固。
2. 2. The potter treatsthe clay by kneading itinto a smooth surface.
   陶工通过揉捏粘土来制作光滑的表面。
3. 3. Thefarmer treated the soil with fertilizerto improve its quality.
   农民用肥料处理土壤，以提高其质量。