研磨

例句：

1. 1. The chef uses a mortar and pestle to grind the spices.
   厨师用研钵和捣杵来磨碎香料。
2. 2. The car was polished to a shine before it was driven off the lot.
   汽车在离开停车场前被抛光到闪亮。
3. 3. The jeweler used a diamond wheel to refine the gemstone.
   珠宝商使用钻石轮来精制宝石。