That is why the recent discovery of a Jurassic ammonite with a shark's tooth embedded in its shell has excited palaeontologists.
这正是最近发现的一枚外壳中嵌有鲨鱼齿状物的侏罗纪鹦鹉螺化石令古生物学家兴奋的原因所在。
Objective: to discuss clinical symptom and therapy for the anterior embedded tooth.
目的：探讨前牙区埋伏牙的临床特点及治疗。
Objective To investigate the nursing experience of guide-erupt operation of maxillary embedded tooth.
目的探讨上颌埋伏牙开窗导萌术的护理经验。
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