I'm concerned right now about an active infection in his bottom left canine. - Yeah, that looks very suspicious.

我现是他左下犬齿活性感染。— 是啊，看起来很可疑。

Males' canines are twice as long as females'.

雄性犬齿比雌性犬齿长两倍。

Canines have a sharp, pointy surface for tearing food.

犬齿有一个锋利、尖尖表面，用来撕裂食。

And they would come back with canine slashes and stuff like that.

他们回来时会带着犬齿之类东西。

Technically speaking, a sabertooth is simply any animal with extremely elongated canine teeth.

从技术上讲，剑齿虎就是任何具有极长犬齿。

This giant tooth right here is the canine tooth of a saber-toothed cat from an animal called Smilodon.

这个巨大牙齿是剑齿虎犬齿，这是一种有巨大牙齿猫科。

They have large canines that they use to rip and tear into their prey.

它们有巨大犬齿，可以用来撕裂猎。

You also see the big canine teeth that they have.

您还可以看到他们拥有大犬齿。

It had four big canine teeth up front and several smaller meat slicing teeth in the back.

它前面有四颗巨大犬齿后面有几颗稍小切肉用牙齿。

And in Euchambersia, the tooth sockets of its canines are also connected to this canal.

而欧氏菌属中，其犬齿牙槽也与这条运河相连。

Human men today have 10% longer canines than women, and this difference isn't unique to our species.

当今人类男性犬齿比女性长 10%，而且这种差异并非人类所独有。

Our canines have actually become shorter over time.

随着时间推移，我们犬齿实际上变得更短了。

Just look at the canines on the first human, Ardipithecus ramidus, or Australopithecus anamensis versus modern humans.

只要看一下第一个人类，即始祖阿尔迪猿人，或湖畔南方古猿人犬齿与现代人类对比就知道了。

That's right, those canines you carry around today aren't particularly useful.

没错，现你随身携带那些犬齿并不是特别有用。

We can see those large canines, what it would be like to be on the dinner side of a short faced bear.

看到那些很大犬齿，试想一下被短面熊当成晚餐会是什么样吧。

And what he realized was that instead of deep grooves, Euchambersia actually has prominent ridges on its canines.

他意识到，Euchambersia 犬齿上没有深沟，实际上有突出脊。

One way successful cynodonts, like Thrinaxodon, might have done this is through burrowing.

成功犬齿兽类，如 Thrinaxodon，可能通过挖洞来做到这一点。

Over time, gorillas have evolved increasingly longer canines, but when it comes to humans, our teeth took a different evolutionary path.

随着时间推移， 大猩猩进化出了越来越长犬齿，但对于人类来说， 我们牙齿却走上了一条不同进化道路。

If we look at it from this angle, we can see this cut where this large canine would have gone through this bone.

要是我们从这个角度看，我们能看到这个切口，这里就是巨大犬齿咬进这块骨头地方。

But when they compared the distance between those holes with the distances between the upper and lower canines in Thrinaxodon, they didn't match.

但是， 当他们将这些孔之间距离与 Thrinaxodon 上下犬齿之间距离进行比较时，它们并不匹配。