The sea lamprey is an ancient jawless fish.

七鳃鳗是一种没有颚的古老鱼类。

It grabs it with its jaws.

它抓住甲虫的颚。

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

矮暴龙的颚肌和牙齿设计不能咬穿骨头。

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。

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。

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。

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

但比于身体型，美洲豹有着猫科动物中最有力的颚咬合力。

While fish with jaws first appeared in the Silurian, they proliferated in the Devonian.

虽然有颚的鱼最早出现 志留纪，但它们纪大量繁殖。

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肌。

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。

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。

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

这些巨兽是动物界真正的“颚”。

His enormous jaws bit off the girl's head with a single bite, immediately killing her.

他那巨大的颚部一口咬掉了女孩的头颅，瞬间夺去了她的生命。

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。

And Morganucodon still had this old-style jaw joint.

Morganucodon 仍然有这个老式的颚关节。

There were a number of short-faced kangaroo species living in Pleistocene Australia, with jaws adapted for grinding up tough leaves.

更新世的澳大利亚生活着许多短脸袋鼠，它们的颚适合磨碎坚硬的树叶。

And while dire wolves didn't have the jaw strength of their cousins, the borophagines, they could still crack open bones.

虽然恐狼没有它们的表亲食骨狼那样的颚部力量，但它们仍然可以咬开骨头。

Somewhere around China, a fish developed jaws, and its descendants drove jawless fishes, sea scorpions and branching plankton to extinction.

中国的某个地方，一条鱼长出了颚，它的后代使无颚鱼、海蝎子和分支浮游生物灭绝。

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 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。