iron brass

例句：

1. 1.He hammered the nail into the wall with a heavy iron hammer.
   他用沉重的铁锤把钉子敲进墙上。
2. 2.The old house was made of iron and wood.
   这所老房子是用铁和木头建造的。
3. 3.Iron is used to make tools and weapons.
   铁被用来制造工具和武器。