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1·Last premolar of upper jaw, first molar of lower jaw.

上颚最后的一只前臼齿，下颚最前的一只臼齿。

2·Absence of a third or a fourth premolar or of one molar.

缺少一个第三或者一个第四前臼齿或者一个臼齿。

3·Carnassial: Last premolar of upper jaw, first molar of lower jaw.

裂齿：上颚最后的一只前臼齿，下颚最前的一只臼齿。

4·Absence of more than two first premolars or absence of a first and a second premolar.

缺少超过两个第一前臼齿或者一个第一和一个第二前臼齿。

5·The retention of the clasp on molar is greater than premolar in the same condition of undercut.

相同倒凹条件下，磨牙卡环的固位力比前磨牙卡环大。

6·The retention of the clasp on molar is greater than premolar in the same condition of undercut.

相同倒凹深度上，磨牙金合金卡环固位力比前磨牙大。

7·Objective to evaluate the effect of autotransplantation of impacted anterior tooth and premolar.

目的评价自体牙移植的临床效果。

8·Objective the aim of this study was to investigate the root canal system of maxillary first premolar .

目的观察离体上颌第一前磨牙根管解剖结构。

9·Objective To construct the fine 3d model of the maxillary first premolar for finite element analyzes (FEA).

目的建立上颌第一前磨牙的精细三维模型，并最终应用于有限元分析(FEA)。

10·It was clear that while the premolar was broadly humanlike, it wasn't from a modern human, Brown recollects.

布朗回忆道：“看得很清楚，虽然那颗前臼齿大体而言像人牙，可绝不是现代人的牙齿。”