但是，在所有食肉动物中，下犬牙位于颌的前面，只有当嘴张大时上犬牙才能暴露出来。
But in all carnivores, the lower canines are in the front of jaws, and only if the mouth is wide open are the upper canines exposed.
结果两组对比在错颌的构成比之间无统计学意义，各种错颌类型在两组间的分布也相似；
Results The rate of malocclusion was no significant difference between nocturnal bruxism patients and normals. The friquence of each kind of malocclusion in two groups is same basically.
目的：利用三维激光扫描仪扫描全牙列模型，对获得的数据进行处理，重构牙颌的三维图形。
Objective: the acquired data of 28 standard gypsum teeth crowns scanned by a 3-d laser scanner were processed, then the 3-d models of the dens were reconstructed.
他偶然发现了一个450万年前的有袋动物的颌骨。
He came across the jawbone of a 4.5 million-year-old marsupial.
将黄颌蛇与其他被我们归类为毒蛇的蛇区别开来的，并不是它们没有毒液，而是缺乏一种将毒液输送到猎物体内的有效方法。
What separates colubrids from other snakes we have been classifying as venomous, is not the lack of venom, but the lack of an effective way to deliver the venom into its prey.
它窄长的头骨、没有牙齿的尖颌和短短的颈椎表明，它与无齿翼龙类似。
Its elongated skull with toothless tips and short cervical vertebrae indicate that it is similar to that of Pteranodon.
对于黄颌蛇来说，毒液一定有其他的作用，可能和消化猎物有关。
For colubrids, the venom must serve some other purpose, maybe linked to digesting prey.
黄颌蛇，你可能也听过这种蛇，虽然它们经常被归类为毒蛇，但实际上它们通常是无毒的。
Colubrids, and you probably heard this too, although they are often classified as venomous snakes, they are actually generally non-venomous.
接下来的六年里，乔伊在里尔与医院颌面外科医师艾玛·伍丽一起工作。
Over the next six years, Joy worked with maxillofacial surgeon Emma Woolley in Rhyl.
“一块羚羊颌骨内部的痕迹表明，这些原始人曾将它的舌头割了去，”怀特说。
"The marks on the inside of one antelope jaw showed they cut out the tongue," White said.
但是一项新的研究提出了这样一种可能性：虽然生物化石的颌骨和牙齿看起来似乎是按照事先设计好的方式发挥功能，但是这并不代表他们实际如此。
Yet a new study suggests that even if the jaws and teeth of fossilised creatures look as if they are built to function in a given way, it does not mean that they actually did so.
他们对诸如沙鲨等小一点的鲨鱼所咬食的伤口进行了测量，或把大鲨鱼击昏，用电击刺激其颌部肌肉，以测量其咬劲。
They also measured the bites of small sharks such as sand sharks, and tested larger sharks by knocking them out and using electricity to stimulate the jaw muscles.
他没有浪费一点时间，把颌骨交给澳大利亚古dna检测中心之后，就驱车赶往阿得雷德南部的奥尔丁格，去向84岁的海伦·布莱克伯恩请求一份她的DNA标本。
He didn't waste any time. After handing the jawbone over to the Australian Centre for Ancient DNA, he drove south of Adelaide to Aldinga, to ask 84-year-old Helen Blackburne for a sample of her DNA.
因此，当有这些（强壮）颌骨的化石出土时，人们便认为这些生物也是吃较硬的食物。
So when fossils with these jaw structures have turned up, it had been assumed that the creatures were eating tough foods too.
脊柱姿势不正将额外的压力放到你的颌关节。
伯格尔博士和他的同事们在论文中写道，这块颌骨有一些类似人类的特征，然而，这并不表示这块颌骨的主人就必须是人类。
The jawbone has some human-like features, Dr. Berger and colleagues write, yet that does not mean the owner of the jawbone was necessarily human.
颌骨，牙龈，嘴唇和软、硬颚不断的在生活中补充它们自己。
The jawbone, gums, lips, and soft and hard palates are constantly replenishing themselves throughout life.
良好的饮食习惯是保持口腔颌支持它们最佳结构所必需的。
A good diet is required to keep the mouth and supporting structures in optimal shape.
沙蚕的颌齿是由蛋白质跟锌离子结合而成。
Ragworm jaws are made of a mixture of protein and zinc ions.
布兰金把颌骨送到阿得雷德实验室以后三周，收到了他一直期盼着的消息——奥斯丁已经提取到有用的基因物质。
Three weeks after delivering the jawbone to the Adelaide lab, Blenkin got the news he'd been hoping for - Austin had extracted usable genetic material.
在它们扁圆头部的前端有一对弯曲的尖牙作为颌齿，用来俘获甲壳类生物并将其撕碎。
At the front of their bulbous blue heads they have curved fangs that act as jaws. They use these to capture and tear apart their crustacean prey.
现代阔口蛇，像蟒蛇和水蟒，能吃大的猎物是因为它们的颌关节恰位于头骨的后面，能使蛇的嘴张得非常宽。
Modern large-mouthed snakes, such as boas and anacondas, can eat large prey because their jaw joints are positioned well behind their skulls, allowing the snakes to open their mouths very wide.
提取出原始DNA的颌骨如今已经回到无名水兵的遗骨里，同时，有各种暂时性的计划打算把这个人埋在杰拉尔顿。
The jawbone from which he had the crucial DNA extracted is now back with the rest of the Unknown Sailor’s remains, and there are provisional plans to bury the man in Geraldton.
然而，当弄清楚在洁净水域的沙蚕，其颌齿也饱含锌的时候，该设想就行不通了。
That suggestion, however, fell apart when it became clear that the jaws of worms from clean water, too, were stuffed with zinc.
而处于排卵期的女性更倾心于有男子气概的男人：颌骨宽大、双眉浓密、身材魁梧，浑身无不透着阳刚之气。
When the women were ovulating, however, they favoured the manly-looking men - big jaws, prominent eyebrows and larger bodies - the stuff that screams virility.
而有强壮颌骨的动物，如大猩猩和猩猩，则适应吃那些需要很多咀嚼的食物。
Animals with robust jaws, like gorillas and orang-utans, have long been known to be adapted to eating foods that require a lot of chewing.
这个时间标识点的下方区域才是我们此次探寻的首要目的地：在这一片灌木丛生的平地处，1994年曾发掘出一块颌骨化石。
Just below this time stamp was our first destination: a bush-pocked flat where a fossil jawbone had been found in 1994.
伯杰说，如果在哈达尔发现的颌骨真的是人属，那么时间上可能是错的——在这一点上，吉姆·贝尔一直据理力争，就像他不遗余力地认定自己发现的化石具有说服力一样。
If the Hadar jaw really is Homo, says Berger, then perhaps its dating is wrong-a contention Kimbel disputes as vigorously as he supports the validity of his fossil.
另一些人认为由于我们的饮食更加趋向于那些易咀嚼的食物，导致原来宽大、强劲的颌骨逐渐退化，进而使得我们的头盖骨也随之缩小了。
Others think our skulls are getting smaller because our diets include more easily chewable foods and so large, strong jaws are no longer required.
另一些人认为由于我们的饮食更加趋向于那些易咀嚼的食物，导致原来宽大、强劲的颌骨逐渐退化，进而使得我们的头盖骨也随之缩小了。
Others think our skulls are getting smaller because our diets include more easily chewable foods and so large, strong jaws are no longer required.
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