porous iron

例句：

1. 1. The porousiron is used to make bridges andbuildings.
   多孔铁用于制造桥梁和建筑物。
2. 2.The porous iron is easy to weld and has a high strength-to-weight ratio.
   多孔铁易于焊接，具有高强度重量比。
3. 3. The porousiron is resistant to corrosion andcan last for many years.
   多孔铁耐腐蚀，可以持续很多年。