Then these cuds come up one by one to the mouth, where they are slowly chewed by the flat grinding teeth.

然后，青草团子一个接一个送回嘴里，绵羊用臼齿，慢慢地嚼这些团子。

Looking at the first skull, we can easily see that it has flat, grinding teeth.

查看第一个头骨，我们可以很容易地看到它有扁平的磨牙。

This is the sharp cutting surface, and the flat grinding surface is on the back.

这是锋利的切割面，背面是平坦的磨削面。

And these create a cutting edge to chop up plants before the smaller pieces are ground up on the flat grinding surface of the dental battery.

在牙科电池的平坦研磨表面上磨碎较小的碎片之前，这些会形成一个切割边缘来切碎植物。