platinum plating

例句：

1. 1. The jewelry was plated with platinum to make it look more expensive.
   这件珠宝被镀上了铂金，使其看起来更昂贵。
2. 2. The car's body was plated with platinum to protect it from corrosion.
   这辆车的车体被镀上了铂金，以保护它免受腐蚀。
3. 3. The gold coins were plated with platinum to enhance their shine.
   这些金币被镀上了铂金，以增加它们的光泽。