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龙被发掘后，这一切都改变了。

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

回到1994年，在意利东北部城市的里雅斯特，科家们发现了“安东尼奥”——一只小型鸭嘴恐龙。

Many hadrosaur fossils have been found in the same area.

许多鸭嘴龙化石在同一地区被发现。

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

随着年龄的增长， 鸭嘴龙埃德蒙顿龙变得越来越，生活在时期的食草动物圆龙也是如此。

So we can draw a circle around the crested hadrosaurs.

所以我们可以在冠冕鸭嘴龙周围画一个圆圈。

And the specific adaptations of the therizinosaurs – like long necks and claws – probably also helped them avoid competition with other herbivorous dinosaurs, like hadrosaurs and ceratopsians.

镰刀龙的特殊适应性——比如长长的脖子和爪子——可能也帮助它们避免与其他食草恐龙竞争，比如鸭嘴龙和角龙。

Nathan had discovered a young hadrosaur, a duck bill dinosaur that lived in that area long ago.

内森发现了一只年轻的鸭嘴龙，这是一种很久以前生活在那片区域的鸭嘴恐龙。

I have here one-half of the lower jaw of a hadrosaur.

我这里有一只鸭嘴龙下颚的二分之一。

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

三只鸭嘴龙有纹章，但一只没有。

As we've mentioned, hadrosaurs have formed a tooth battery of many rows of closely packed relatively small teeth, not unlike what we see in this antelope.

正如我们所提到的，鸭嘴龙已经形成了一个由许多排紧密排列的相对较小的牙齿组成的牙齿电池，这与我们在这只羚羊身上看到的没什么不同。

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。

A large hadrosaur had around a thousand teeth in its mouth at any one time, if you include both the teeth being actively used in eating as well as all the replacement teeth.

一只型鸭嘴龙在任何时候的嘴里都有约一千颗牙齿，如果你把用于进食的牙齿和所有替换的牙齿都包括在内的话。

In hadrosaurs, the grinding surfaces are almost horizontal, meaning that the jaws are moving from side to side and forward and backward.

在鸭嘴龙中，磨削面几乎是水平的，这意味着颌骨会左右移动，前后移动。

And therefore, we know that dental batteries evolved independently in hadrosaurs and ceratopsians, a great example of convergent evolution.

因此，我们知道牙科电池在鸭嘴龙和角龙中独立进化，这是趋同进化的一个很好的例子。

It is the hip structure, the rear facing pubis that the ankylosaur, ceratopsian, and hadrosaurs all share although theropod does not.

这是臀部结构，甲龙、角龙和鸭嘴龙共有的耻骨，尽管兽脚亚目动物没有。

That was when paleontologists studied the trackways of hadrosaurs.

那是古生物家研究鸭嘴龙足迹的时候。

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。

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，鸭嘴龙的旧观点认为它们几乎直立，用后肢站立。

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龙，他是阿尔伯的古生物家菲尔贝尔。

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

描述了两种密切相关的鸭嘴龙物种之间的鳞片模式差异。