They would have almost functioned like a serrated beak or a single large cutting surface.

它们的功能就像是锯齿状的鸟喙或是单侧大型切割型面。

Here are the small roots, and here are the cutting surfaces.

这是小根，这是切割面。

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。