ladder scaffold

例句：

1. 1. The engineer used a ladderto reach the top of the building.
   工程师使用梯子爬到了大楼的顶部。
2. 2. The constructionworkers were using scaffolding tobuild the new bridge.
   建筑工人正在使用脚手架建造新桥。
3. 3. The scaffold wasdesigned to support the heavy equipment during theconstruction process.
   脚手架的设计是为了在施工过程中支撑重型设备。