ungalvanized iron and steel

例句：

1. 1. The construction of the bridge required a large amount of galvanized iron and steel.
   建造这座桥需要大量的镀锌铁和钢。
2. 2. The new car has a galvanized exterior to protect it from corrosion.
   新车有一个镀锌的外壳来防止腐蚀。
3. 3. The old ship was covered in rust, but the galvanized coating protected it from further damage.
   旧船被锈蚀覆盖，但镀锌涂层保护它免受进一步损害。