Humans have two sets of teeth, the deciduous dentition of childhood, which fall out and are replaced by the permanent dentition of adulthood.
人类有两套牙齿，儿童时期的乳牙会脱落，并被成年时期的恒牙齿列所取代。
Permanent dentition
原声例句
2017级专外有声
英语百科
Permanent teeth
Permanent teeth or adult teeth are the second set of teeth formed in diphyodont mammals. In old world simians (including humans), there are thirty-two permanent teeth, consisting of six maxillary and six mandibular molars, four maxillary and four mandibular premolars, two maxillary and two mandibular canines, four maxillary and four mandibular incisors.
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