folding ladder

例句：

1. 1. This folding ladder is very convenient for moving around the house.
   这个折叠梯非常适合在房子里移动。
2. 2. The child was climbing up the ladder to reach the top of the tree.
   那个孩子正在爬梯子爬到树上的顶端。
3. 3. The builders used a folding ladder to reach the roof.
   建筑工人使用折叠梯到达屋顶。