pillar bracket bearing

例句：

1. 1. The pillars ofthe building are made of marble.
   这座建筑的柱子是用大理石做的。
2. 2. Thebrackets on thedoor were loose and needed tobe tightened.
   门上的吊钩松动了，需要拧紧。
3. 3. The bearings in the machine are worn out andneed to be replaced.
   机器里的轴承磨损了，需要更换。