non-homogeneous boundary condition

例句：

1. 1.The soil is non-homogeneous, meaning it's not uniform in texture.
   土壤是非均质的，意味着它质地不一致。
2. 2. The rocks are heterogeneous, with different minerals and compositions.
   岩石是异质的，含有不同的矿物质和成分。
3. 3. The mixture of materials is non-homogeneous, which affects the strength of the final product.
   材料的混合物是非均质的，这影响了最终产品的性能。