He argues that tooth crowns and roots have a high genetic component, minimally affected by environmental and other factors.
他认为，牙冠和牙根有很多的遗传成分，受环境和其他因素的影响很小。
For example, in looking at survey data on the health behavior of middle and high school students, the factor I found that best predicted whether or not a kid was obese was tooth brushing.
譬如说，在观察了一份有关中学生和大学生健康行为的调查后，我发现一个孩子是否肥胖的最佳预知方法是看刷牙。
High temperatures can destroy biofilms, as can some chemicals, but neither approach is safe to use inside the delicate interior of a human tooth.
和一些化学物质一样，高温也能够破坏生物膜，但在这两种方法都不安全。
High efficiency DC brushless motor, micro chip processor control, tooth synchronous belt drive, smooth operation, noise.
高效直流无刷马达，微芯片处理器控制，齿行同步皮带传动，运行平稳，噪音极底。
Over-whitening can also cause teeth to become thin and brittle and can lead to high sensitivity and discoloration as tooth enamel becomes translucent.
美白牙齿过度，会使牙齿变得薄弱。同时，由于牙釉质变为半透明状，会导致牙齿高度敏感、变色。
Quenched internal cutting edge bucket and tooth, more strength and high durability.
配装高耐磨的刀板，精铸斗齿，提高了铲斗的使用寿命。
His high temperature delayed having an infected tooth out.
他由于发高烧推迟拔掉一颗受感染的牙齿。
The high al, Zn base alloy conical gear with straight tooth in squeezing casting can ensure an accuracy of tooth face.
利用挤压铸造技术生产高铝锌基合金直齿圆锥齿轮，齿面精度能够得到保证。
An optimization design method for a hypoid gear with high tooth was proposed based on the investigations into variations of working tooth height and constraint conditions of undercut.
通过增加工作齿高和对根切条件的深入研究，提出了高齿准双曲面齿轮的优化设计方法。
This paper puts forward a design method of pulley hob with parabolic tooth shape, which is used in the high torque drive.
提出了高扭矩抛物线齿同步带轮滚刀齿形的设计方法。
Conclusion: high fluoride and low nourishment would cause underdevelopment of tooth matrix firstly, then affect the calcification of matrix, finally deteriorate the quality of teeth.
结论：高氟低蛋白营养首先影响牙基质的发育，进一步影响矿化，从而使牙齿整体发育不良，过度磨损。
The blue tooth module as a result of its power loss low, the compatibility good, the reliability is high and superiority and so on connectionless line receives the world the value.
蓝牙模块由于其功耗低、兼容性好、可靠性高和无连接线等优势而受到全世界的重视。
The whitening strips and products with high concentrations of HP caused more users to complain from tooth sensitivity.
美白条和含有高hp的美白产品造成较多使用者抱怨牙齿敏感。
Alveolar bone has high plasticity, which can change as the tooth grows and falls off, and the chewing pressure changes.
牙槽骨具有高度可塑性，可随着牙齿的生长、脱落及咀嚼压力的变化而变化。
High frequency noise of gears is mainly from tooth error and base pitch, and low frequency noise from accumulated errors of tooth spacing.
齿轮高频噪声产生的主要原因是齿形误差和基节偏差；低频噪声产生的主要原因是齿距积累误差。
Compared with a pneumatic ball tooth grinder, the electric ball tooth grinder has the advantages of high mechanical efficiency, convenient grinding, non exhaust pollution, non exhaust noise, etc.
与气动球齿修磨机相比具有机械效率高，方便修磨，无排气污染、无排气噪声等优点。
Some people said I look like Xiao Yaxuan. I also have a high nose, the big mouth and lets me feel the quite proud tooth, hee hee!
有人说我象萧亚轩呢。我还有一个高鼻梁，大嘴巴和让我感到比较自豪的牙齿，嘻嘻！
Compared with the cycloid pin wheel gearbox, the planetary gearbox with one tooth difference, formed by cycloid equidistant line gears has advantages of high efficiency large loading capacity and...
应用摆线等距线齿轮组成的一齿差行星减速器与摆线针轮减速器相比，具有效率高、承载能力大和结构简单等优点。
Young patient with high requirement for appearance and long-term effect, patient with bad psychology, tooth defect of anterior tooth.
对于美观及长期效果要求高的年轻患者 或心理素质不理想的患者，前牙缺损慎 用嵌体修复。
Gives a new method which designs tooth forms of pre-grinding hob according to thepartical demands on hob of gear, and designs a kind of pre-grinding hob used in high-speed traction gears.
根据高速牵引齿轮对齿轮滚刀的特殊要求，提出了设计磨前滚刀齿形的新方法，并用此法设计了高速机车牵引齿轮的磨前滚刀。
Harmonic analysis shows that tooth harmonic components of no-load EMF waveform is considerable high, which give rise to high distortion and bad waveform.
对样机空载电势波形的谐波分析表明，齿谐波电势分量很大，导致空载电势波形的畸变率较大、波形较差。
For spiral bevel gears' formate gear, using proper figurate cutting tool and generic CNC machining center, the gear's hard tooth-surface can be milled with high speed.
螺旋锥齿轮副的成形法大轮，利用合适的成形铣刀，在通用的立式加工中心上，可以实现热处理后硬齿面的高速铣削。
Recently, the domestic automobile manufacturers puts forward the application of 'high tooth gear 'in order to reduce the transmission gear noise, and improve gear strength.
近年来，国内外汽车变速器厂为了降低齿轮噪声、提高齿轮强度而提出采用“细高齿”齿轮，并对其进行研究与应用。
High tooth gear has small module, small pressure Angle, and large addendum to enlarge the transverse contact ratio, improve gear strength, and reduce the noise.
细高齿齿轮是采用小模数、小压力角、大齿顶高来加大端面重合度，达到提高齿轮强度、降低噪声的目的。
Think of using a tooth-pick to poke an orange at high speed. See if you can make a symmetrical linear cut.
想象你用一根牙签以高速度去戳一个橘子。你可以将那橘子造成对称而且线形的切痕？
Comparing with involute gear pumps, circular tooth gear pumps have following characteristics: compact structure, no pulsation, stable rotation, high efficiency, low noise, and long working life.
与渐开线齿轮泵相比，圆弧齿轮泵的特点是：体积小、无脉动、转动平稳、效率高、噪声低以及寿命长等。
Comparing with involute gear pumps, circular tooth gear pumps have following characteristics: compact structure, no pulsation, stable rotation, high efficiency, low noise, and long working life.
与渐开线齿轮泵相比，圆弧齿轮泵的特点是：体积小、无脉动、转动平稳、效率高、噪声低以及寿命长等。
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