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

我现在担心是左下犬齿活动性感染。— 是啊，看起来很可疑。

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动物。

Canines have a sharp, pointy surface for tearing food.

犬齿有一个锋利、尖尖表面，用来撕裂食物。

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

而在欧氏菌属中，其犬齿牙槽条运河相连。

I mean, we've got these sharp canine teeth that look just perfect for digging into flesh.

我有些锋利犬齿，看起来是非常适合撕扯肉类。

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

回来时会带着犬齿之类东西。

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

个巨大牙齿是剑齿虎犬齿，是一种有巨大牙齿猫科动物。

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

它有巨大犬齿，可以用来撕裂猎物。

Both canines and incisors, grow up to 50cm long in an adult male.

成年雄性犬齿和门牙均可长至 50 厘米长。

Our canines have actually become shorter over time.

随着时间推移，我犬齿实际上变得更短了。

You also see the big canine teeth that they have.

您还可以看到拥有大犬齿。

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。

Males' canines are twice as long as females'.

雄性犬齿比雌性犬齿长两倍。

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，现在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。

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%，而且种差异并非人类所独有。

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一点。

Meanwhile, the descendants of those little cynodonts persisted through the entire Mesozoic Era, hiding in the dinosaur's shadows.

此同时，那些小犬齿兽类后代， 在整个中生代一直存在，躲在恐龙阴影下。

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

要是我从个角度看，我能看到个切口，里就是巨大犬齿咬进块骨头地方。