By using the finite element method (FEM) software, the vibration of 3-d finite element model of maxillary central incisor tooth was analyzed.
在三维有限元模型的基础上，利用有限元分析软件对上颌中切牙的振动模态进行了分析。
Hirst said the tooth, believed to be a child's incisor, may have come from incidents he had at school.
赫斯特说，据信是儿童门牙的这个牙齿，可能来自于他在学校念书时所发生的一些事。
Hirst said the tooth, believed to be a child's incisor, may have come from incidents he had at school.
赫斯特说，据信是儿童门牙的这个牙齿，可能来自于他在学校念书时所发生的一些事。
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