skeleton steps

例句：

1. 1. The old house had been converted into a museum with skeleton steps leading up to the entrance.
   这所老房子被改造成了博物馆，骨架台阶通向入口。
2. 2. The construction workers were busy fixing the skeleton steps that led up to the roof.
   建筑工人正在忙着修理通往屋顶的骨架台阶。
3. 3.The old mansion was restored with new skeleton steps that matched the original design perfectly.
   这座古老的豪宅经过修复，新的骨架台阶与原始设计完美匹配。