poor clay

例句：

1. 1. The farmer used poor clay to make pottery.
   农民用贫瘠的粘土制作陶器。
2. 2.The old house was built on poor clay, which made it difficult to repair.
   这座老房子建在贫瘠的粘土上，难以修复。
3. 3. The poor clay in the riverbed is rich in minerals, which can be used for industrial purposes.
   河床中的贫瘠粘土富含矿物质，可用于工业用途。