These sizes are exceptional among theropods.

这种体型在脚亚目恐龙中是罕见的。

Instead of theropod footmarks, they found those of crocodilians.

他们发现的是鳄鱼的足迹，而不是脚类的。

Natovenator is part of the dinosaur group called theropods.

脚类恐龙是被称为脚亚目恐龙群体的一部分。

But that does not completely explain the absence of theropod tracks.

但这并不能完全解释脚亚目食肉恐龙的缺位。

Some small theropods grew quickly and others grew slowly.

有些小型脚亚目恐龙长得很快，而另一些则长缓慢。

The researchers examined rings called " cortical growth marks" in different theropod species.

研究人员检查了不同脚亚目恐龙身上被称为“皮层长痕”的圆形标记。

In that sort of environment even a big theropod would constantly have been looking over its shoulder.

在那样一种环境，是一头巨大的脚亚目食肉恐龙也会不时回头张望。

The theropod group includes all the meat-eating dinosaurs like Tyrannosaurus.

脚亚目恐龙包括所有诸如暴龙之类的食肉恐龙。

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

是从侏罗纪晚期的脚亚目恐龙进化而来的。

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

像脚亚目类恐龙一样，这些巨人使用气囊来呼吸，而且有很轻的中空骨骼。

Frequently, these were taken by theropods.

这些恐龙经常被脚亚目食肉恐龙捕食。

The creature, with sharp claws, appears to be from a group of dinosaurs called theropods.

这种有着锋利爪子的物似乎来自一种名为脚类的恐龙。

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脚亚目恐龙。

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类的脚亚目恐龙都有羽毛。

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

“到白垩纪末，脚亚目恐龙的多样性令人惊叹。”

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足亚目恐龙家族。

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，像暴龙这样的脚亚目类恐龙长了两倍大。

Bigger, three-toed footprints came from large-bodied, two-legged plant-eaters called ornithopods or perhaps, the researchers say, a large theropod.

研究人员说，更大的、三趾的脚印来自体型庞大的两腿植食动物--脚类动物，或者是一种大型脚类动物。

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

但使是这些早期的脚亚目恐龙，就是我们现在发现的这种恐龙，真的常常小。

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”过去关于脚亚目恐龙长的想法。