碾子

例句：

1. 1. The farmer used a large wooden slab as his main grain-crushing tool.
   这位农民用一块大木头作为他的主要谷物研磨工具。
2. 2. The miller's daughter was skilled at using the millstone to crush grains.
   磨坊的女儿擅长使用磨石来碾碎谷物。
3. 3. The ancient people used stone wheels to crush grains for their daily needs.
   古代的人们使用石头轮子来碾碎谷物以满足他们的日常需求。