It was a human bone. A lower jaw.

一块人的骨头。一块下颌骨。

But no human beings today have jaws like this one.

但在没有人有这样的下颌骨。

The fossil find is a piece of jawbone, with a tooth, from a dromaeosaur.

这次发的化石是带有一颗牙齿的奔龙颌骨。

It's anchored well on the bone and the jaw is about this deep.

它非常结实地嵌在骨头上颌骨大概这么深。

However, those finds were limited to jaw parts and loose teeth.

然而，这些发是部分颌骨和一些零散的牙齿。

Researchers have, however, managed to find sets of teeth and partial jaws.

但是，研究人员设法找猿的牙齿和部分颌骨。

What happens is that the root is anchored well into the lower jaw.

实际情况就是这个牙根深深地嵌在其下颌骨上。

So as our jaws shrank, we still kept all 32 teeth.

所以即使我们的颌骨萎缩，我们仍然保有 32 颗牙齿。

Their head and jawbones capture vibrations and transmit them directly into the ear.

它们的头部和颌骨捕捉振动并将其直接传递耳朵中。

Then we'll move down to your mandible, it helps you chew food.

接下来，我们来看一下帮助你咀嚼食的下颌骨。

He's got massive jaw muscles. He's designed for cracking through bone.

颌骨上的肌肉发达。它能够咬穿骨头。

Way in the back of our jaws, behind our premolars, we have teeth called molars.

在我们颌骨的深处，前磨牙的后面，有一种牙齿叫做磨牙。

Another bone found in Baishiya Karst Cave is a lower jaw bone of a young Denisovan.

在白石崖洞穴发的另一块骨头是年轻丹尼索瓦人的颌骨。

Whoever owned it must have been able to bite really hard.

这块下颌骨所属的那个人啃咬起食来一定很有劲。

They have to wait until our jaw is developed enough to handle the strain of their arrival.

它们必须等我们的颌骨发育足够强壮，才能承受它们的生长压力。

Here's another example from Mike Mew where the maxilla was brought forward, again without surgery.

这是 Mike Mew 医生，下一个案例医生同样没有借助手术就使上颌骨向前生长。

Those mandibles go from 0 to 200 miles per hour in point zero-zero-zero-zero-one-five seconds.

这些下颌骨在 0.000015 秒内从 0 加速每小时 200 英里。

Our ancestors, like our living cousins, had bigger and broader jaws.

我们的祖先，和我们代近亲动一样，拥有宽大的颌骨。

But exactly why our jaws became smaller is a bit of a mystery.

颌骨变小的确切原因仍是一个谜。

Some have strong armor, deathly stingers, or sharp mandibles.

他们的武器是大自然给予他们的。有些人的装甲坚硬，致命的刺痛或尖锐的下颌骨。