1. The skin of amphibians is permeable to water. 两栖动物的皮肤是透水的。
2. A number of products have been developed which are permeable to air and water. 已开发出许多可渗水透气的产品。
3. Compared with the East, however, the West faced a greater number of external threats along more permeable frontiers. 然而,与东方相比,西方在更容易渗透的边界上面临着更多的外部威胁。