clay stone

例句：

1. 1. The ancient city is built on a clay stone foundation.
   这个古老的城市建立在黏土和石头的基础上。
2. 2.The builders used clay stones to build the walls of the castle.
   建造者使用黏土和石头来建造城堡的墙壁。
3. 3.The pottery was made from clay stones and fired in a kiln.
   陶器是由黏土和石头制成的，然后在窑中烧制的。