Pinnipeds-walruses, seals and sea lions. And parrots, hummingbirds and songbirds. That's it.

再加上海象、海豹和海狮等鳍足亚动物，以及鹦鹉、蜂鸟和鸣禽。全部就是这些。

That is certainly large enough to take on an adult ornithopod.

大到足以捕年鸟脚亚食草恐龙。

He believes there will be more discoveries of peculiar theropods in the future.

他相信未来还会发现更多奇特的兽脚亚恐龙。

It was thought that dinosaurs that grew the fastest also got bigger than other theropods.

科学家认为，生长速度最快的恐龙的体型也比其他兽脚亚恐龙的体型更大。

If we look at this first surface, we'll see one of those fast-moving theropods heading off to the north at high speed.

在这片表面上，可以看出有行动迅速的兽脚亚恐龙正高速向北边前进。

Or tiny, like the haplorhine clade of monkeys, tarsiers, and apes.

进化枝也可以很微小，如猴子、眼镜猴、猿猴等简鼻亚。

The mutations in the songbird lineage must thus have happened after the Passeri and Tyranni lines diverged, but before the Passeri themselves began proliferating into their current variety.

因此，鸣禽谱系的突变定发生在雀形和霸鹟亚品种的分化之后，而又在雀形本身开始繁前的品种之前。

And one of the problems of the teeth though, is they certainly are not as strong as other teeth in theropod dinosaurs laterally.

但是这些牙齿的问题之是，横向上它们肯定没有其它兽脚亚恐龙的结实。

While Triceratops and Stegosaurus grew up to eight meters long, bird-like theropods like Tyrannosaurus grew twice as large.

当三角龙和剑龙长到八公尺长时，像暴龙这样的兽脚亚类恐龙长了两倍大。

Like the theropods, these titans used air sacs to breathe and had light, hollow bones.

像兽脚亚类恐龙样，这些巨人使用气囊来呼吸，而且有很轻的中空骨骼。

All the known sets of prints that show speed come from a family of dinosaurs called theropods.

所有已知的能测出速度的脚印都来自兽足亚恐龙家族。

But even for these early theropod dinosaurs, the one we've now discovered is actually very, very small.

但即使是这些早期的兽脚亚恐龙，就是我们现在发现的这种恐龙，真的非常非常小。

These sizes are exceptional among theropods.

这种体型在兽脚亚恐龙中是罕见的。

Birds evolved from a grouping of dinosaurs known as theropods in the late Jurassic.

鸟是从侏罗纪晚期的兽脚亚恐龙进化而来的。

Presumably, it was lost by their theropod ancestors, which did not need it. Dr Toda's and Dr Baldwin's experiments have shown how this loss was reversed.

据推测，它是兽脚亚动物的祖先遗失的，它们并不需要它。户田博士和鲍德温博士的实验显示了这种损失是如何逆转的。

The Cretaceous equivalent of zebra and antelopes-the victim species in every wildlife documentary about the dramas of the African savannah-were herbivorous dinosaurs called ornithopods.

白垩纪被称为鸟脚亚食草恐龙其地位相当于斑马和羚羊--每部有关非洲大草原的纪录片中被捕的种群。

And it's actually a very interesting animal, because it's the oldest known theropod dinosaur, so meat-eating dinosaur, from the UK.

它实际上是种非常有趣的动物，因为它是已知最古老的兽脚亚恐龙，也就是食肉恐龙，来自英国。

He said, " The diversity of theropod dinosaurs by the end of the Cretaceous is totally amazing."

“到白垩纪末，兽脚亚恐龙的多样性令人惊叹。”

D'Emic told Reuters news agency the latest research " overturns" past thinking about the growth of theropods.

德埃米克告诉路透社，最新的研究“颠覆了”过去关于兽脚亚恐龙生长的想法。

But, the animal's closest relatives and almost all bird-like theropods have feathers.

但是，这种动物的近亲和几乎所有形似鸟类的兽脚亚恐龙都有羽毛。