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。
His mouth was as wide as an oven, his teeth like yellow fangs, and his eyes, two glowing red coals.
他的嘴像火炉一样大，他的牙齿像黄色的獠牙，他的眼睛像两块燃烧的红炭。
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。
Tooth decay happens when teeth are attacked by acid, and this can happen in two ways.
蛀牙发生时，牙齿受到攻击，酸，这可以发生在两个方面。
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。
There remained to her from her past, two teeth,--one above, the other below,--which she was continually knocking against each other.
她一辈子只留下两颗牙，一颗在上，一颗在下，她老爱让这两个牙捉对儿相叩。
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。
Rub the peel in circular motions all over your teeth everyday for at least two to three minutes.
每天用香蕉皮以打圈方式擦洗牙齿两三分钟以上。
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。”
She made it to the hospital and fortunately did not require surgery. The woman eventually passed the teeth after two days in the hospital.
很幸运的是不用手术，两天后就自然排出了。
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。
Then you trip over two violins, a sitar and a collection of other musical instruments, and find yourself staring at three teeth on a coffee-table.
再往里走，两支小提琴，一个锡塔尔琴，以及一堆乐器藏品，都与你擦身而过，最后你的视线会落在咖啡桌上的三颗牙齿上。
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。
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。
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