Unlike human beings, the great white's jaws aren't fused to the skull.

和人类不同，大白鲨的颚片并没有和脑壳。

But once we got our hands on softer cooked foods, our powerful jaws no longer needed to work as hard and shrank as a result.

但一旦我们掌握了较软的熟食，我们强大的颚不再需要努力工作了也因此萎缩。

The meat was so tough that his jaws hurt from chewing it.

那块肉是如此的坚韧以致他的颚由于嚼它而受伤。

Snakes have famously expandable jaws to engulf large prey.

众所周知，蛇有可膨胀的颚来吞食大型猎物。

The sea lamprey is an ancient jawless fish.

七鳃鳗是一种没有颚的古老鱼类。

So they dissected infected ants and zoomed in on their jaw muscles with electron microscopes.

因此，他们解剖了受感染的蚂蚁，并用电子显微镜放大了它们的颚。

Nanotyrannus did not have the jaw muscles or tooth design for penetrating bone.

矮暴龙的颚和牙齿设计不能咬穿骨头。

But, for its size, a jaguar has the strongest jaws of any cat.

但比于自身体型，美洲豹有着猫动物中最有力的颚咬合力。

But unlike the suction-feeding sperm whales of our times, Livyatan had short, powerful jaws.

但不同于我们时代的吸食型抹香鲸，利维坦鲸拥有短而强有力的颚部。

Fish are the most diverse group of vertebrates with over 30,000 unique species, and much of that diversity is due to the hundreds of unique jaws separating otherwise identical species.

鱼类是脊椎动物中最多样化的群体，有 3 万多个独特的物种，而这种多样性大部分是由于数百个独特的颚部将其他同的物种分开。

But remember that a froghopper can accelerate at 550 g's, and the mandibles of the snap-jaw ants pull over 100,000 g's, that's insane.

但是请记住，一只沫蝉可以在 550 个 G 的加速度下加速，而陷阱颚蚁的下颚可以拉动超过 100，000 个 G，这太疯狂了。

While orthodontists go through the same training as dentists, they will also need to complete a post-graduate orthodontics course.

虽然牙齿矫正师要接受与牙医同的培训，但他们还需要完成研究所的齿颚矫正学程。

The researchers say the acanthothoracid was one of the earliest jawed vertebrates with teeth ever to live.

研究人员表示，acanthothoracid是有史以来最早的有牙齿的颚脊椎动物之一。

This is because it has to balance out nearly half a ton of head and jaws.

这是因为它需要与半吨重的头颚平衡。

It grabs it with its jaws.

它抓住甲虫的颚。

The jaws of a T. Rex can leave a bite mark over a meter long. And his 30 centimeter teeth can penetrate deep into flesh.

霸王龙的颚部可以留下一米长的咬痕。而它30厘米长的獠牙可以深深刺入血肉当中。

These giants are the real " jaws" of the animal kingdom.

这些巨兽是动物界真正的“颚”。

We have differences correlated not only with one sex, but with that short period when the reproductive system is active, as in the nuptial plumage of many birds, and in the hooked jaws of the male salmon.

我们发现差异不仅与一种性别有关， 而且与生殖系统活跃的短暂时期有关，例如许多鸟类的新婚羽毛， 以及雄性鲑鱼的钩状颚。

A huge steam shovel opens its jaws, descends into an open amphitheater, licks up five tons at each mouthful, and, swinging sideways over the open cars, neatly deposits its booty.

一个巨大的蒸汽铲张开它的颚，下降到一个开放的圆形剧场，每口舔掉五吨，然后在敞开的车厢上侧身摆动，整齐地存放它的战利品。

The adults may have been slower and less agile, but at least they had bone-crushing jaws to make up for it.

成年个体可能行动较慢， 不够敏捷，但至少它们拥有能够粉碎骨头的颚部来弥补这一点。