white iron

例句：

1. 1.The white iron door is sturdy and durable.
   这扇白铁门结实耐用。
2. 2. He used a hammer to shape the white iron into a sculpture.
   他用锤子把白铁打造成了一件雕塑。
3. 3.White iron is often used for making tools and utensils.
   白铁常用于制作工具和餐具。