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。
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。
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。
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。
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。
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。
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 teeth are almost as hard as rocks.
人的牙齿几乎和石头一样硬。
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。
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。
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