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。

Take for example, the footprints of hadrosaurs.

以鸭嘴龙的足迹为例。

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，科学家们发现了“安东尼奥”——一只小型鸭嘴恐龙。

That was when paleontologists studied the trackways of hadrosaurs.

那是古生物学家研究鸭嘴龙足迹的时候。

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。

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。

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。

Here, we have a complete hadrosaur tooth.

在这里，我们有一颗完整的鸭嘴龙牙齿。

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龙将赢得比赛。