penetralia

例句：

1. 1. The penetralia in the tunnel allows for easy passage.
   隧道中的穿透物使得通行变得容易。
2. 2.The material is highly permeable, allowing water to pass through easily.
   这种材料非常透水，水分可以很容易地通过。
3. 3.The researcher studied the permeability of different materials under various conditions.
   研究员研究了不同材料在不同条件下的透水性。