coarse grained clay

例句：

1. 1.The soil is rich in minerals and canbe used for building houses.
   这种土壤富含矿物质，可以用来建造房屋。
2. 2. Coarse grained clayis often used as a basefor pottery.
   粗粒粘土通常被用作陶器的基底。
3. 3. Thecoarse grained clay was found to havehigh water absorption.
   这种粗粒粘土被发现具有高吸水性。