But this all changed when Bruno, another hadrosaur of the same species was discovered.

但相同物种的另一只鸭嘴恐被发掘后，这一切都改变了。

That was when paleontologists studied the trackways of hadrosaurs.

那是物学家研究鸭嘴足迹的时候。

Back in 1994, in Trieste, a municipality in North Eastern Italy, scientists discovered Antonio - a small hadrosaur, or duck-billed dinosaur.

回到1994，在意大利东北部城市的里雅斯特，科学家们发现了“安东尼奥”——一只小型鸭嘴恐。

Has described the differences in scale patterns between two closely related species of hadrosaurs.

述了两种密切相关的鸭嘴物种之间的鳞片模式差异。

So we can draw a circle around the crested hadrosaurs.

所以我们可以在冠冕鸭嘴周围画一个圆圈。

These final three hadrosaurs are called Lambeosaurine Hadrosaurs.

这最后三只鸭嘴被称为鸭嘴亚科。

Three of the hadrosaurs have a crest, but one doesn't.

三只鸭嘴有纹章，但一只没有。

Here, we have a complete hadrosaur tooth.

在这里，我们有一颗完整的鸭嘴牙齿。

But in a marathon, the slower, but steadier hadrosaur would win the race.

但在马拉松比赛中，速度较慢但更稳定的鸭嘴将赢得比赛。

The hadrosaur Edmontosaurus got dramatically larger with age and so did Camarasaurus, an herbivore that lived in the Jurassic Period.

随着龄的增长， 鸭嘴埃德蒙顿变得越来越大，活在侏罗纪时期的食草动物圆顶也是如此。

All the skulls have a wide beak and modified dental battery, characteristic of hadrosaurs.

所有的头骨都有一个宽大的喙和改良的牙套，这是鸭嘴的特征。

Some groups of dinosaurs, probably devoted a lot of time to care for their young, like theropods and hadrosaurs.

有些恐群体，可能会花很多时间照顾它们的幼崽，比如兽脚类恐和鸭嘴。

What is a shared derived character of the circle that includes the ankylosaur, ceratopsian and hadrosaurs but not the theropod?

包括甲、角和鸭嘴但不包括兽脚类动物的圆圈的共同衍特征是什么？

This is a cross section of a hadrosaur jaw.

这是鸭嘴下颚的横截面。

So, in a sprint, a tyrannosaur would definitely outpace a hadrosaur.

因此，在短跑中，霸王肯定会超过鸭嘴。

Mummified dinosaurs were first found in Wyoming in 1910. They were hadrosaurs.

木乃伊恐于 1910 首次在怀俄明州被发现。它们是鸭嘴。

Take for example, the footprints of hadrosaurs.

以鸭嘴的足迹为例。

We find scaly skin most often in hadrosaurs, and there are lots of amazing specimens preserving large skin impressions.

我们在鸭嘴中最常发现鳞状皮肤，并且有许多令人惊叹的标本保存着大面积的皮肤印痕。

We have so many hadrosaurs with skin impressions, that he paleontologist Phil Bell, formally of the University of Alberta.

我们有太多带有皮肤印记的鸭嘴，他是阿尔伯塔大学的物学家菲尔贝尔。

If you remember, I mentioned earlier, that the old view of hadrosaurs had them standing almost upright, on their hind limbs.

如果你还记得的话，我之前提到过，鸭嘴的旧观点认为它们几乎直立，用后肢站立。