permanent tooth
常见例句
- The exfoliation of the deciduous teeth is mainly brought about by resorption of their roots and enhances by growth and eruption of the succeeding permanent teeth.
总而官之,乳牙之所以会脱落主要在于它们的根部会发生吸收,而其下正在萌出的永久齿则增进了它在根部进行吸收的工作。 返回 permanent tooth