虽然乳牙会在某一阶段全部更换为恒牙,他们是非常重要的几个原因,包括槟榔、讲话。
While primary teeth will at one stage be replaced by the permanent teeth, they are very important for several reasons - including chewing and speech.
虽然20颗乳牙一般全部萌出在3岁左右,但是萌出的步骤和顺序是多种多样的。
Although all 20 primary teeth usually appear by age 3, the pace and order of eruption varies.
虽然20颗乳牙一般全部萌出在3岁左右,但是萌出的步骤和顺序是多种多样的。
Although all 20 primary teeth usually appear by age 3, the pace and order of eruption varies.
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