rollers and cage

例句：

1. 1. The rollers are used toroll the paper into shape.
   滚筒用于将纸张卷成形状。
2. 2. The cage is designed tohold the bird safely.
   笼子设计用来安全地容纳鸟。
3. 3. The rollers and cage werea great help in moving the heavy furniture.
   滚筒和笼子在搬运重家具时起到了很大的帮助作用。