air impermeability

例句：

1. 1. The material is designed to prevent air from escaping.
   这种材料设计用来阻止空气逃逸。
2. 2.The window was sealed tightly to ensure air impermeability.
   窗户被密封得紧紧的，以确保空气不渗透。
3. 3. The new design improves air impermeability and reduces energy consumption.
   新设计提高了空气不透气性并减少了能源消耗。