cockle stairs

例句：

1. 1. The old house had a cobwebbed staircase that led to the attic.
   这所老房子有一个多孔的楼梯，通往阁楼。
2. 2. The wormy stairs creaked underfoot as she made her way up to the second floor.
   她上楼时，吱吱作响的多孔楼梯让她感到不安。
3. 3. The old mansion had been renovated with cobwebbed stairs and new floors.
   这座古老的豪宅经过翻新，多孔的楼梯和新的地板让人眼前一亮。