porosity of jig bed

例句：

1. 1.The soil has a high porosity, allowing water to easily pass through.
   土壤具有高孔隙率，使水分容易通过。
2. 2. The fabric is made from cotton, which has a high porosity and breathability.
   这种织物由棉制成，具有高孔隙性和透气性。
3. 3.The rock has a low porosity, making it difficult to extract oil.
   这种岩石的孔隙率低，难以提取石油。