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

像兽脚亚目类恐一样，这些巨人使用气囊来呼吸，且有很轻的中空骨骼。

Instead of theropod footmarks, they found those of crocodilians.

他们发现的是鳄鱼的足，是兽脚类的。

Natovenator is part of the dinosaur group called theropods.

非鸟兽脚类恐是被称为兽脚亚目恐群体的一部分。

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

科学家认为，生长速度最快的恐的体型也比其他兽脚亚目恐的体型更大。

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

研究人员检查了同兽脚亚目恐身上被称为“皮层生长痕”的圆形标。

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

兽脚亚目恐包括所有诸如暴之类的食肉恐。

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目恐都有羽毛。

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

这种有着锋利爪子的生物似乎来自一种名为兽脚类的恐。

Frequently, these were taken by theropods.

这些恐经常被兽脚亚目食肉恐捕食。

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

但这并能完全解释兽脚亚目食肉恐的缺位。

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目恐。

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目恐进化来的。

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目恐家族。

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

“到白垩纪末，兽脚亚目恐的多样性令人惊叹。”

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

当三角和剑长到八公尺长时，像暴这样的兽脚亚目类恐长了两倍大。

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--鸟脚类动物，或者是一种大型兽脚类动物。

Some small theropods grew quickly and others grew slowly.

有些小型兽脚亚目恐生长得很快，另一些则生长缓慢。

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目恐，就是我们现在发现的这种恐，真的非常非常小。

Unfortunately, for Majungasaurus and most theropod dinosaurs, we don't have a lot of specimens to work with.

很遗憾的是对于玛君和多数兽脚类恐来说我们都没有很多标本。

These sizes are exceptional among theropods.

这种体型在兽脚亚目恐中是罕见的。