Ceratopsian bone beds almost certainly all represent catastrophes.

肿鼻角龙骨床几乎可以肯定代表着大灾难。

Pachyrhinosaurus like pretty much all members of the Ceratopsian family have no weaponry from behind their neck backwards.

肿鼻角龙和角龙家族的所有成员一样，从颈部往后没有什么武器。

Pachycephalosaurs are more closely related to ceratopsians.

厚头龙与角龙类的关系更为密切。

These features are used to differentiate between ceratopsian species.

这些特征用于区分角龙类物种。

And this baby ceratopsian was no exception.

这只角龙宝宝也不例外。

And in the fossil record, we see that with the Ceratopsian dinosaurs, that, every now and then, things did go wrong.

在化石证据里，我们能够看到角龙，不时地就会出现问题。

This specimen tells us a lot about how ceratopsian dinosaurs developed.

这个标本告诉我们很多关于角龙类恐龙是如何进化的。

And Saurolophus angustirostris from Mongolia, we also know that ceratopsians had scaly skin.

还有来自蒙古的Saurolophus angustirostris，我们也知道角龙类的皮肤是鳞片状的。

Many of the ceratopsians also had horns over their eyes.

许多角龙的眼睛上也有角。

But there were abundant remains of one species of dinosaur from the same fossil formation: Protoceratops, a small, hornless ceratopsian.

但是，同一化石地层中有一种恐龙的大量遗骸：原角龙，一种小型无角角龙。

This ceratopsian has a beak and a frill.

这只角龙有喙和褶边。

Male and female ceratopsians, for example, have been suggested to have different horn shapes and sizes.

例如，雄性和雌性角龙被认为具有不同的角形状和大小。

However, because many ceratopsians are known from single specimens, it becomes hard to say anything definitive about sexual dimorphism.

然而，由于许多角龙都是从单一标本中发现的，因此很难对两性二态性做出任何明确的判断。

We call ceratopsians with a nasal horn and these small frill bones ceratopsid ceratopsians.

我们称长有鼻角的角龙为角龙类，而这些带褶边的小骨头为角龙类。

Although Pachyrhinosaurus doesn't have the same massive size and weaponry as the other members of the Ceratopsian family, they are still pretty powerful and dangerous dinosaurs.

尽管肿鼻角龙没有角龙家族的其它成员庞大的身躯和武器库，它们仍然是非常强大危险的恐龙。

The ankylosaur, euplocephalus, ceratopsian, triceratops, and all of the hadrosaurs have a predentary bone.

甲龙、真头龙、角龙、三角龙和所有的鸭嘴龙都有一块掠食骨。

Later in their evolution, ceratopsians evolved a nose horn and small bones on the edge of the frill.

在进化的后期，角龙进化出了鼻角和褶边边缘的小骨头。

The grinding surfaces in ceratopsians, like the one I have here, are almost vertical.

角龙的磨削面，就像我这里的一样，几乎是垂直的。

Ceratopsian brain cases are actually separated from their skull which means that they can actually have a large impact on something and it's not gonna addle their brain.

肿鼻角龙的颅腔其实与它们的颅骨是分开的，这说明就算它们猛烈地撞击到什么东西也不会损伤它们的脑。

Although hadrosaurs and ceratopsians both have dental batteries for grinding up plants, they were doing similar things in slightly different ways.

尽管鸭嘴龙和角龙类都有用来磨碎植物的牙科电池，但它们以略有不同的方式做着类似的事情。