The biological anthropologist Christy Turner is an expert in the analysis of changing physical characteristics in human teeth.
生物人类学家克里斯蒂·特纳是分析人类牙齿的物理特性变化的专家。
Human teeth are almost as hard as rocks.
人的牙齿几乎和石头一样硬。
Yes, what was wrong with your old human teeth?
你到底把自己的牙怎么了？
The wear of human teeth is an inevitable physiological process.
人体天然牙的磨损是无法避免的。
Ardi's upper canine teeth are more similar to stubby human teeth than sharp chimpanzee teeth.
—与黑猩猩锋利的牙齿相比，“阿蒂”的犬齿更像人类的短平的牙齿。
How to recur the color of natural human teeth is an issue concerned by both dentists and patients.
如何使修复体重现自然牙的色彩，成为医患双方共同关注的问题。
RESULTS Proliferating cell nuclear antigen had different distribution in each stage during human teeth development.
结果增殖细胞核抗原在人牙齿发育各阶段具有不同的表达模式。
Methods: Areas of subgingival calculus were selected from 6 freshly extracted human teeth with periodontal disease.
方法：选取6颗新近拔除的有明显龈下牙石的牙周病患牙。
Yuanmou man in 1965, archeologists found two ancient human teeth and some rough stone tools in Yuanmou County, Yunnan Province.
元谋人1965年，在云南省元谋县，考古人员发现了两颗远古人类的牙齿和一些粗糙的石器。
Human teeth are omnivorous in design, yet more closely resemble primate teeth whose possessors live largely on fruit and plants.
人类牙齿的设计属杂食，但更类似于主要以水果和植物为食的灵长类牙齿。
Human teeth are harder than gold but softer than pyrite, according to the Mohs Hardness Scale, which categorizes how easily minerals scratch.
根据莫氏硬度表，人类牙齿的硬度比黄金大但比黄铁矿小。
It is the purpose of this study to examine the prevalence and distribution of cementicles on different root surfaces of 524 extracted human teeth.
从人体上拔除的524枚牙的牙根表面上检查了牙骨质疣的发生率及其分布。
AIM: to investigate the morphology of permanent human teeth of the Han Nationality and provide anatomic data for clinical treatment of tooth and pulp diseases.
目的：了解我国汉族人群恒牙牙体形态特征，为牙体、牙髓病的临床治疗提供解剖学资料。
Objective This in vitro study quantitatively assessed the effect of frequency and time span of immersion of human teeth in acidic soft drinks on enamel surface microhardness.
目的本实验用显微硬度测量法，定量研究和评估人离体牙釉质在酸性饮料中的硬度变化，比较牙釉质在饮料中浸泡时间及浸泡频率对釉质表面硬度的影响。
The ratios of these element forms change with climate and local geology. Like tree rings, human teeth record this signature year by year and can be used to narrow down a person's native region.
这些元素因为气候和当地地理而改变的比率像树年轮一样，人类的牙齿同样年复一年的记录着这些特征，这常常可以用来限定一个人的出生地。
Human beings needed to use tools because they did not have sharp teeth like other meat-eating animals, such as lions and tigers.
人类需要使用工具，因为他们没有像其他食肉动物如狮子和老虎那样锋利的牙齿。
Teeth from ancient human ancestors suggest that females joined new social groups once they reached maturity.
从远古人类祖先牙齿显示，女性们一到成年就加入新的社会群体。
Stone tools abound, but human bones from other Asian sites are almost as rare as hens’ teeth.
石制工具大量出土，但在亚洲其他地方发现的人类骸骨几乎是凤毛麟角。
The only reason to have titanium teeth? Medical reasons, he says, like "if a dog breaks a tooth... it's the same as a crown for a human."
他说，狗嘴里镶钛牙的唯一的理由，只能是因为牙科医学上的原因，“如果狗牙断掉了，也可以像人的牙齿一样，作一个牙冠镶嵌在上边。”
The National Museum of Dentistry in Baltimore, Md., has on display one of Washington's lower dentures—made from gold, ivory and lead, as well as human and animal teeth.
—马里兰州巴尔的摩国家牙科博物馆的展品中有华盛顿的下半副假牙，用金子、象牙、铅还有人和动物的牙齿制成。
The human jaw shrank even faster, making wisdom teeth largely useless and creating the overcrowding that people face today.
然 而，人类下巴的缩小幅度更大，让智齿几乎变得没有用处，反而让现代人的脸部显得有些拥挤。
The element mercury has been shown to damage the human nervous system. Yet, since 1856, mercury amalgam is “the” filling dentists have used to repair our teeth.
虽然说汞对人体神经系统有害，但1856年以来，汞齐就被用于修补人们的牙齿了。
The element mercury has been shown to damage the human nervous system. Yet, since 1856, mercury amalgam is "the" filling dentists have used to repair our teeth.
虽然说汞对人体神经系统有害，但1856年以来，汞齐就被用于修补人们的牙齿了。
Some human populations have now all but completely stopped growing wisdom teeth, while others have almost 100% likelihood of developing them.
有些人种已经完全不长智齿了，但另一些人种几乎100%的人都会长智齿。
From hiccups to wisdom teeth, the evolution of homo sapiens has left behind some glaring, yet innately human, imperfections.
从打嗝到智齿的产生，人类的进化留下了许多让人惊叹的变化，然而人类也并非已进化得完美无缺。
But, if less idealised, it is a lot more human and exhibits one very human characteristic in particular: he might have been the Lord of all he saw, but young King Tut had buck teeth.
然而即便没有那般理想，它却更具人性，展现出人类的突出特点：或许他曾是万物之尊，但年轻的图坦卡蒙法老的确长着龅牙。
Methods: After preparing specimens of every stage of human developing teeth, immunohistochemical staining of nerve growth factor and its receptor was carried on.
方法：制备人牙齿发育各阶段标本，进行神经生长因子及其受体的免疫组化研究。
Human babies get their first teeth between six months and one year.
小宝宝们长到六个月至一岁时会长出第一批牙齿。
Objective: to provide morphological basis for dental aging and senile teeth diseases and to study age-related changes of pulp-dentin complex of human premolar.
目的：研究人前磨牙牙髓牙本质复合体的增龄性变化，探讨牙衰老和老年牙病的形态学基础。
Objective: to provide morphological basis for dental aging and senile teeth diseases and to study age-related changes of pulp-dentin complex of human premolar.
目的：研究人前磨牙牙髓牙本质复合体的增龄性变化，探讨牙衰老和老年牙病的形态学基础。
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