estin

例句：

1. 1. The steel beam is strong enough to support the weight of the building.
   这个钢梁足够坚固，可以支撑大楼的重量。
2. 2. Steel is a durable and strong material that is used in many industrial applications.
   钢是一种耐用且强度高的材料，广泛应用于工业领域。
3. 3. Held together by steel screws, the door is securely fastened.
   门通过钢螺丝牢固地连接在一起。