He's got a big, thick bull-dog head and it's perfectly designed for grasping prey and crushing it.
它有着牛头犬一样又大又壮的脑袋，其设计非常适合抓住并且咬碎猎物。
His teeth are also designed to take a lot more pressure than many other predatory dinosaurs.
它的牙齿能够承载的压力也远远大于很多其它掠食恐龙。
They were blade-like but not so thin that they were breakable.
它们呈刀刃状不过不是薄切易断的那种。
His teeth are his number-one weapon.
它的牙齿是其第一武器。

Its secondary weapon would be the claws on its foot.
它的次要武器是脚上的爪子。
They uses their feet the way modern birds use their feet.
它们使用脚的方式跟现代鸟类相仿。
Look at an eagle, and eagle can grasp prey with its foot.
看看老鹰，一只老鹰能用脚抓住猎物。
Well, Majungasaurus could do the same thing.
玛君龙也能做同样的事情。
He could grasp it to hold it and then he'd use those teeth to rip chunks of it.
它能用脚抓住猎物，然后用那些牙齿撕下一大块肉。
For nine million years, Majungasaurus ruled Madagascar.
九百万年来，玛君龙统治着马达加斯加岛。
But as temperatures around the world continued to cool, the Majungasaurus was not fast or smart enough to survive.
不过随着全球气温持续下降，玛君龙的速度和智力不足以让其生存下来。
Winters became harsher than ever before.
冬天变得比从前更难熬。
And the peak of summer saw draughts of devastating intensity.
而盛夏巅峰又有异常严重的旱灾。
New species of plant eaters evolved.
新型的植食者进化了出来。
These herbivores were more adaptable and could survive in a variety of temperatures.
这些植食动物适应力更强，能够在各种气温之下生存。
Once again, meat eaters had to change to keep up.
食肉动物要再一次改变来跟上步伐。
In what became Canada where the winters were cold and dark and the summers were desperately arid, a faster, savage cousin of T-Rex was on the rise.
在当时的加拿大冬季寒冷而且黑暗而夏天又异常地干旱，一种迅速、残暴的霸王龙的亲戚开始兴起。
And it decided to hunt in packs.
而且它决定了群体狩猎。
76 million years ago, this relative of Tyrannosaurus roamed the earth.
七千六百万年前，这些暴龙的亲戚在地球上游荡。
It was smaller and sleeker, had a narrower skull and its eyes were placed more to the side.
它体型更小更敏捷，头颅更加狭窄而且它们的双眼更靠近两侧。
But it was almost as deadly. It was Albertosaurus.
不过却几乎同样致命。它是阿尔伯特龙。
Albertosaurus gets its name from Alberta, Canada where some of these monster had been discovered.
阿尔伯特龙得名于加拿大阿尔伯塔，是这些怪兽化石被发现的地方。
But it lived throughout western North America, possibly as far north as Alaska and as far south as Texas.
但它在整个北美西部生活，最北可能到阿拉斯加州最南到德克萨斯州。
They appeared 76 million years ago and died out with the other dinosaurs at the end of the Cretaceous.
它们出现于七千六百万年前，与其它恐龙一起于白垩纪末期灭绝