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单词 permanent tooth
释义

permanent tooth

noun
A tooth in a mammal that replaces a temporary milk tooth and lasts for most of the mammal’s life.One set of 20 non-permanent teeth precedes the permanent teeth, but the 12 molars are not replaced....
  • Most kids stop grinding when they lose their baby teeth because permanent teeth are much more sensitive to pain.
  • Injuries to both baby teeth and permanent teeth should be treated by a dentist.
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更新时间:2024/9/21 23:00:29