primary teeth meaning in English
暂牙, 乳牙
Examples
- 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。 - Early loss of baby teeth due to decay or infection , may cause primary teeth to shift to fill the gap
牙齿过早开始脱落多是由于腐蚀或是感染，这可能导致乳牙移行填补空缺。 - The eruption time of the permanent teeth and the shedding time of the primary teeth vary from child to child
另外，换牙时间的迟与早因人而异，即使与一般同龄孩子比较，相差一年也算正常。 - At the time of birth , the crowns of the primary teeth ( baby teeth ) are almost complete and the chewing surfaces of the permanent molars are forming
在出生的时候，第一套牙（乳牙）的牙冠已基本发育完全，恒磨牙的咀嚼面也已形成。 - The permanent teeth may appear darker in colour when compared with the primary teeth because the enamel of the permanent teeth is more highly mineralized and more translucent than that of the primary teeth , allowing the underlying yellow - coloured dentine to show through
由于恒齿的珐琅质钙化得比较好，透光度也比较高，光线可以把珐琅质下层黄色的象牙质呈现出来，恒齿看起来也就比乳齿黄。不过，在某一些情况下，牙齿是会变色的。