来自MSN13 小时
Scientists Examine Dental Condition of 52 Skeletons Found in a Cemetery, Reveal Ancestors ...
Scientists Examine Dental Condition of 52 Skeletons Found in a Cemetery, Reveal Ancestors Suffered From Cavities Researchers ...
verywellhealth8 天
If Teeth Are Not Bones or Organs, What Exactly Are They?
Teeth are made of enamel, calcium, and other substances. This article defines key terms to help you understand how teeth fit ...