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后，这一切都改变。

Many hadrosaur fossils have been found in the same area.

在同一地区现许多鸭嘴龙化石。

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

内森现一只年轻的鸭嘴龙，一种很久以前生活在该地区的鸭嘴恐龙。

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的里雅斯特，科学家们现“安东尼奥”——一只小型鸭嘴恐龙。

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。

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

木乃伊恐龙于 1910 年首次在怀俄明州现。它们是鸭嘴龙。

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

因此，在短跑中，霸王龙超过鸭嘴龙。

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

随着年龄的增长， 鸭嘴龙埃德蒙顿龙变得越来越大，生活在侏罗纪时期的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、角龙和鸭嘴龙但不包括兽脚类动物的圆圈的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，速度较慢但更稳的鸭嘴龙将赢得比赛。

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

第一组包括鸭嘴鸭嘴龙和它们的早期亲戚，以及各种有点不起眼的小型植食者。

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、角龙和鸭嘴龙共有的耻骨，尽管兽脚亚目动物没有。

This is a cross section of a hadrosaur jaw.

这是鸭嘴龙下颚的横截面。

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。

Take for example, the footprints of hadrosaurs.

以鸭嘴龙的足迹为例。

These final three hadrosaurs are called Lambeosaurine Hadrosaurs.

这最后三只鸭嘴龙称为鸭嘴龙亚科。

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。

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

有些恐龙群体，可能花很多时间照顾它们的幼崽，比如兽脚类恐龙和鸭嘴龙。

Here, we have a complete hadrosaur tooth.

在这里，我们有一颗完整的鸭嘴龙牙齿。

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

在鸭嘴龙中，磨削面几乎是水平的，这意味着颌骨左右移动，前后移动。