mill body

例句：

1. 1. The mill body is made of wood and has a large wheel at the center.
   磨坊主体由木头制成，中心有一个大轮子。
2. 2.The mill body was built to grind grain into flour.
   磨坊主体被建造来将谷物磨成面粉。
3. 3. The mill body was damaged during the construction.
   在建设过程中，磨坊主体受到了损坏。