grind rough

例句：

1. 1. The potatoes need to be ground into a smooth paste.
   土豆需要被磨成光滑的糊状物。
2. 2.The chef uses a mortar and pestle to grind the spices.
   厨师使用研钵和捣棒来研磨香料。
3. 3.The meat was ground finely for the soup.
   肉被磨得很细，用于汤中。