thitmin

例句：

1. 1.The iron ore is mined from the earth's crust.
   铁矿石是从地壳中开采出来的。
2. 2. Steel is stronger and more durable than iron.
   钢比铁更坚固耐用。
3. 3.He used a hammer to hit the nail into the wall.
   他用锤子把钉子敲进墙上。