iron stairs

例句：

1. 1.The old house had a beautiful iron staircase that led up to the second floor.
   这座老房子有一个漂亮的铁楼梯，通往二楼。
2. 2. The children were climbing the iron stairs, eager to reach the top.
   孩子们正爬着铁楼梯，渴望到达顶端。
3. 3. The iron stairs were so sturdy that they could support the weight of several people at once.
   这些铁楼梯非常坚固，可以同时支撑好几个人的重量。