molten iron

例句：

1. 1.The molten iron was poured into the mold.
   熔融的铁被倒入模具中。
2. 2.The molten iron was used to make new tools.
   熔融的铁被用来制造新的工具。
3. 3. The molten iron was heated and then poured into a mold.
   熔融的铁被加热后倒入模具中。