这种膜的渗透性很好，可以让水分子轻松通过。

This membrane has excellent ___permeability, allowing water molecules to pass through easily.

这种材料的渗透性很高，能让水分快速通过。

This material has high ___permeability, allowing water to pass through quickly.

沙质土壤的高渗透性让水能快速渗入地下。

The high ___permeability of sandy soil allows water to seep through quickly.