There are some characteristics about it, for example, highly tracking accuracy and tracking function etc. These characteristics need the require which can accurately measure tooth trace 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。
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。
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