The new cycloid cam sliding tooth transmission is a two-teeth difference sliding tooth planetary gearing with cycloid internal gear.
新型摆线凸轮活齿传动是一种内齿轮齿廓为摆线及其等距线的二齿差活齿行星传动。
Children don't complete their set of 20 baby teeth until they are two to three years old.
孩子到两三岁时才长齐20颗乳牙。
A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth.
哈佛大学的一位人类学家提出，用火做饭可以追溯到近200万年前，这可以解释人类的一些特征，比如大脑大，牙齿小。
There are two other kinds of research that have thrown some light on the origins of the Native American population; they involve the study of teeth and of languages.
还有另外两种研究对印第安人的起源提供了一些线索；它们包括对牙齿和语言的研究。
As you see this portrait has two main problems, the slight yellow tint of the teeth and the gaps between some of them.
正如你所看到的，这幅肖像图主要有两个问题，牙齿上的淡黄色和某些牙齿间的缝隙。
But there are two much more serious problems, common dental diseases that can lead not only to loss of teeth but also to loss of life: periodontal disease and oral cancer.
不过，还有两个更为严重的健康问题，普通的牙病不只让人失去牙齿，还会失去性命：它们可能引发牙周病和口腔癌。
Fluoride helps protect your teeth from the acid that is released when this happens. It does this in two ways.
氟能够通过两个途径在细菌新陈代谢是你口腔成为酸性的时候保护你的牙齿。
By working slowly from both sites, you can nearly close the gap between the two teeth, but don't make it disappear completely, that would look again unnatural.
两边都这样慢慢处理，你几乎可以缝合牙间的缝隙，但也不要让它们完全消失掉了，那又会看起来很不自然。
But the truth is that prolonged delay seems inevitable for the British-designed towers, leaving two huge gaps in the original masterplan for Ground Zero like missing teeth.
然而事实是长时间的推迟看来是无可避免的了，只能在爆炸废墟的原始平面图上留下两个巨大的像丢失的牙齿一样的裂口了。
To prevent your teeth from decaying, you can do two things - strengthen your teeth's defenses with fluoride and sealants, and reduce the number of bacteria in your mouth.
为了预防龋坏的发生，你可以做两件事情——用氟化物和封闭剂增强牙齿保护，减少口腔内细菌。
In the melee that followed, a policeman on horseback knocked out two of Apotheker's teeth.
后来在一片混乱中，被骑警打掉了两颗牙齿。
He had two triangular pieces of tile in his head, instead of eyes, his mouth was made of an old broken rake, and was, of course, furnished with teeth.
雪人的眼睛是两枚三角形的小瓷片，嘴巴是一把旧耙子做成的，当然喽，耙齿还在。
"The palettes," replied the dental professor, "are the front teeth, the two upper ones."
“瓷牌，”那位牙科医生回答说，“就是门牙，上排的两个门牙。”
During its first two years it supplied 100m false teeth, and the first patient charges it introduced, in 1951, were for dentures.
在头两年中，NHS供应了一亿颗的假牙，之后在1951年引入的第一例收费病例就是补牙的治疗。
For the first two days this felt like a slight hassle, but in time it became a part of my daily routine, as instinctive as brushing my teeth.
开始我感到这样做有点麻烦，但后来它成为我的日常生活习惯，就像每天要刷牙一样自然。
Most babies get new teeth in this order: First the bottom two middle ones, then the top two middle ones, then the ones along the sides and back.
大部分的宝宝长牙顺序都如此：先长两颗下门牙，然后再是两颗上门牙，接着长两侧及后面的牙。
These insults, poured forth in a voice roughened by brandy, did, indeed, proceed in hideous wise from a mouth which lacked its two front teeth.
那种恶骂从中了酒毒的哑嗓子里喊出来，确是很丑，那张嘴确也缺少两颗门牙。
Select the ‘Smudge’ tool and carefully push the white of the two adjoining teeth towards each other.
选区涂抹工具，然后小心的将缝隙两边的白色互相连接起来。
NASA said the crew had sent down video and photographs of a small star-shaped gear with two broken teeth. Experts were trying to determine whether it was related to the problem.
NASA说乘员已经下传了有关一个断了两个齿的小型星型齿轮的视频和图像。
One day I was happily in my mid-thirties, holding down3 a job while taking care of a house and two children, and the next, I was getting advice from my mother on how to effectively floss4 my teeth.
头一天我还快快乐乐地过著而立之年的日子——我胜任一份工作，有自己的房子，膝下养有两个孩子——而转天，我就开始向妈妈寻求如何有效地用牙线剔牙的建议了。
Using an optical incremental encoder and hardware interface, the position of the motor rotor between the two teeth of the motor stator is measured.
采用高分辨率的增量式光电编码器和相应的硬件接口电路，实现了变磁阻电机转子在定子两个齿之间位移的检测。
Ivory is the hard white material that forms an elephant's two long teeth, or tusks.
象牙是一种很难找的白色材料，它们来自象的两个长牙。
"Ya doomayoo, ya mogoo, ya boodoo," says a hulking old Russian with a blue V-neck sweater, a gray comb-over, and two gold teeth.
“yadoomayoo, yamogoo, yaboodoo，”一位粗犷的俄罗斯老人向他们喊道，他穿着蓝色V领毛衣，谢顶的头上留着几根头发，还镶着两颗金牙。
Use your thumb and forefinger to gently work the floss between two teeth, being careful not to pull it roughly or saw it back and forth, both of which can injure the gum.
用你的食指和拇指轻轻地在两齿之间拨动牙线，小心一点不要太粗鲁或前后牵动，这样会伤害到牙龈。
However, although they look dangerous because of their wide mouths and sharp teeth, all but two or three kinds are harmless to humans.
尽管它们有宽大的嘴巴和锋利的牙齿，看上去很危险，然而除了两三种外，其余的对人类并没有危险。
The child has just learned to tie his shoes, but he knows to protect the wound to avoid infection, but also a day to brush two teeth to protect the teeth.
这孩子刚学会系鞋带儿，但他都知道要保护伤口以免感染，同时还要一天刷两次牙来保护牙齿。
The child has just learned to tie his shoes, but he knows to protect the wound to avoid infection, but also a day to brush two teeth to protect the teeth.
这孩子刚学会系鞋带儿，但他都知道要保护伤口以免感染，同时还要一天刷两次牙来保护牙齿。
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