useful for grinding down plants...用来碾碎植物
grind down磨损(磨光;磨尖;碾碎)
Mills used to use heavy stones to grind down the wheat into flour; now they use more modern machinery.
磨房过去使用笨重的石磨把麦磨成面粉; 现在它们使用的是比较现代的机械。
It won't grind down any finer than this.
不能磨得比这个再细了。
like gazelles, have large flat back teeth,比如羚羊,有着大而平的臼齿
back teeth磨牙,臼齿
One of my lower back teeth is killing me.
我的一个后牙正在痛。