There are some characteristics about it, for example, highly tracking accuracy and tracking function etc. These characteristics need the require which can accurately measure toothtrace error.
此技术具有跟踪精度高，跟踪性能好等特点，满足了高精度测量齿向误差的要求。
2
She used a slither of tooth enamel the size of a nail clipping to trace his origins.
埃文斯通过大小相当于小钉的牙齿瓷釉（珐琅）质，来确定他的来历。
3
Conclusion in tooth shape keys, the tooth slope angel increases, along with slope Angle of duplicated trace decrease.