And you can see that its teeth provide an excellent grinding surface for plant material.

你可以看到它的牙齿为植物材料提供了极好的研磨表面。

Effectively, there is only one large grinding surface in each upper or lower jaw.

实际上，每个上颚或下颚只有一个大的磨削面。

The grinding surfaces in ceratopsians, like the one I have here, are almost vertical.

角龙的磨削面，就像我这里的一样，几乎是垂直的。

The big horn sheep, dear and kangaroos all have flattened molars that create an excellent grinding surface.

大角羊、亲爱的和袋鼠都有扁平的臼齿，形成了极好的磨削表面。

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。

This is what a tooth would have looked like before it became part of the grinding surface.

这就是牙齿在成为磨削表面的一部分之前的样子。

In hadrosaurs, the grinding surfaces are almost horizontal, meaning that the jaws are moving from side to side and forward and backward.

在鸭嘴龙中，磨削面几乎是水平的，这意味着颌骨会左右移动，前后移动。

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。