Nanotyrannus actively hunts and kills young Tyrannosaurs. Not to eat, but to get rid of the competition.

矮暴龙会主动搜寻猎杀幼龙。不是为了食物而是要消灭竞争对手。

But Triceratops has one major disadvantage. lts night vision is no match for a tyrannosaur.

但三角龙有个致命弱点，它夜视能力无法与龙相提并论。

So perhaps the young tyrannosaurs were using their arms more to tackle prey.

所以可能幼年龙是用前爪来对付猎物。

There were Raptors hunting you. There were Tyrannosaurs hunting you. And there was death from the sky.

猛禽类恐龙在追捕。龙要吃了。还有来自天空死神。

Suskityrannus is the first really good record of the early tyrannosaurs in North America, he wrote in an email.

他在电邮中，" 狼暴龙是北美早期龙首个最佳记录。"

These were the tyrannosaurids, the largest of the tyrannosaurs.

这些是龙，最大 龙。

You're going to try and build a complete tyrannosaur skeleton.

您将尝试构建一个完整龙骨架。

And their decline meant that the large carnivores, like the tyrannosaurs, were doomed as well.

它们衰落意味着大型食肉动物， 如龙，也注定要灭亡。

These two large tyrannosaur cousins are found in the same rocks, and are closely related.

这两个大型龙表亲在同一块岩石中发现，并且关系密切。

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

因此，在短跑中，龙肯定会超过鸭嘴龙。

Van Bijlert:  And to do that, we found a fossilized trackway of a smaller tyrannosaur.

Van Bijlert：为此，我们发现了一条较小龙化石足迹。

For example, Yutyrannus, a tyrannosaur from China, had little wisps that grew from follicles in its skin.

例如，羽暴龙，一种来自中国龙，它皮肤上有从毛囊中长出小丝线。

In most carnivorous dinosaurs, like tyrannosaurs, it attached high up, near the hips.

在大多数食肉恐龙中，如龙，它附着在臀部附近高处。

There are actually four separate tyrannosaur species here.

这里实际上有四种不同龙。

Let's contrast that with the skull of this tyrannosaur.

让我们将其与这只龙头骨进行对比。

In 2014, scientists in British Columbia discovered trackways made by three Tyrannosaurs that had all been walking side by side.

2014年，不列颠哥伦比亚省科学家发现了由三只龙并排行走所制造行迹。

And this includes a fairly large tyrannosaur.

这包括一个相当大龙。

Similarly, in dinosaurs like tyrannosaurs, the tibia was much longer than the femur in the juveniles.

同样，在龙这样恐龙中，幼年时期胫骨比股骨长得多。

Unlike tyrannosaurs, the length of the ceratopsian hind leg don't change as much.

与龙不同，角龙类后腿长度变化不大。

Falcarius shared an environment with a host of dromaeosaurs, troodontids, and early tyrannosaur relatives, so competitive pressure among carnivores was likely pretty high.

Falcarius 与许多驰龙、伤齿龙和早期龙亲属共享一个环境，因此食肉动物之间竞争压力可能相当高。