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

但相同物种另一只龙被发掘后，这一切都改变。

Many hadrosaur fossils have been found in the same area.

在同一地区发现许多龙化石。

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

内森发现一只年轻龙，一种很久以前生活在该地区龙。

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，在意大利东北部城市里雅斯特，科学家们发现“安东尼奥”——一只小型龙。

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

我这里有一只龙下颚二分之一。

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

木龙于 1910 年首次在怀俄明州被发现。它们是龙。

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

因此，在短跑中，霸王龙肯定会超过龙。

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

随着年龄增长， 龙埃德蒙顿龙变得越来越大，生活在侏罗纪时期食草动物圆顶龙也是如此。

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

包括甲龙、角龙和龙但不包括兽脚类动物圆圈共同衍生特征是什么？

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

但在马拉松比赛中，速度较慢但更稳定龙将赢得比赛。

First group includes the duck billed hadrosaurs and their earlier relatives the and a variety of small somewhat nondescript plant eaters.

第一组包括龙和它们早期亲戚，以及各种有点不起眼小型植食者。

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、角龙和龙共有耻骨，尽管兽脚亚目动物没有。

This is a cross section of a hadrosaur jaw.

这是龙下颚横截面。

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龙和角龙中独立进化，这是趋同进化一个很好例子。

Take for example, the footprints of hadrosaurs.

以龙足迹为例。

These final three hadrosaurs are called Lambeosaurine Hadrosaurs.

这最后三只龙被称为龙亚科。

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

尽管龙和角龙类都有用来磨碎植物牙科电池，但它们以略有不同方式做着类似事情。

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

有些龙群体，可能会花很多时间照顾它们幼崽，比如兽脚类龙和龙。

Here, we have a complete hadrosaur tooth.

在这里，我们有一颗完整龙牙齿。

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

在龙中，磨削面几乎是水平，这意味着颌骨会左右移动，前后移动。