apeiron

例句：

1. 1.The iron ore is mined from the nearby mountains.
   铁矿石从附近的山上开采。
2. 2.Steel is stronger and more durable than iron.
   钢铁比铁更坚固耐用。
3. 3.The steel industry is a major contributor to the economy.
   钢铁工业是经济的主要贡献者。