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

但三角龙有个致命的弱点，它的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。

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

他在电邮中写道，" 郊狼暴龙是北美早龙的首个最佳记录。"

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

猛禽类恐龙在追捕你。龙吃了你。还有来自天空的死神。

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。不是为了食物而是消灭竞争对手。

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

它们的衰落意味着大型食肉动物， 如龙，也灭亡。

These were the tyrannosaurids, the largest of the tyrannosaurs.

这些是龙，最大 的龙。

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

让我们将其与这只龙的头骨进行对比。

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

例如， 来自中国的暴龙类恐龙羽龙，在其皮肤的毛囊中长出了细小的绒毛。

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

范·比尔特：为了做到这一点，我们发现了一条较小的暴龙的化石足迹。

Large theropods like tyrannosaurs, could have reached adult size in 20 years.

龙等大型兽脚类动物可能在 20 年内达到成年体型。

There are actually four separate tyrannosaur species here.

这里实际上有四种不同的龙。

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

2014年，不列颠哥伦比亚省的科学家发现了由三只龙并排行走所制造的行迹。

Although dinosaurs and mammals are not closely related, a human arm has the same bones as those of a tyrannosaur.

虽然恐龙和哺乳动物的亲缘关系并不密切，但人类手臂的骨骼与龙的骨骼相同。

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

同样，在龙这样的恐龙中，幼年时的胫骨比股骨长得多。

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

在大多数食肉恐龙中，如龙，它附着在臀附近的高处。

But it also means that the tyrannosaur would tire out more quickly.

但这也意味着龙会更快疲倦。

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、伤齿龙和早龙亲属共享一个环境，因此食肉动物之间的竞争压力可能相当高。

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

与龙不同，角龙类后腿的长度变化不大。

Dinos like the small tyrannosaur Dilong and the tiny carnivore Juravenator had protofeathers with a central stalk that branched off near the top.

像小型的暴龙帝龙和小型肉食恐龙侏罗猎龙这样的恐龙拥有原始羽毛，这些羽毛有一个中央茎，在顶附近分枝。