1. The corrugated metal roofing provided extra strength and durability to the structure.
波纹金属屋顶为结构提供了额外的强度和耐久性。

2. We packed fragile items in corrugated cardboard boxes to protect them during shipping.
我们把易碎物品装在波纹纸板盒子里，以保护它们在运输过程中的安全。