bick-iron

例句：

1. 1. The iron is very hard and will not bend easily.
   这铁很硬，不容易弯曲。
2. 2. Steel is stronger than iron and can be used for making tools.
   钢比铁更坚固，可以用来制作工具。
3. 3.The iron ore was mined from the nearby mountains.
   铁矿石是从附近的山脉开采出来的。