大概就是我的故事正讲到的那个时期——一个晴朗而严寒的下午，地面是光秃秃的，道路又硬又干。
It was about the period that my narrative has reached: a bright frosty afternoon; the ground bare, and the road hard and dry.
结论：该模型可用于颅颌面硬组织在正中矢状面上的形态特征及因生长、正畸矫治、正颌手术引起的形态变化研究。
Conclusions:This model may be applied for the study of morphologic characteristics and changes induced by growth, orthodontic treatment and orthognathic operation on middle sagittal plane.
结论：该模型可用于颅颌面硬组织在正中矢状面上的形态特征及因生长、正畸矫治、正颌手术引起的形态变化研究。
Conclusions:This model may be applied for the study of morphologic characteristics and changes induced by growth, orthodontic treatment and orthognathic operation on middle sagittal plane.
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