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

大到足以捕杀一头成年鸟脚亚目食草恐龙。

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

研究员说，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。

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.

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

Such a predator would have been unable to take on an adult ornithopod.

这样的掠食者本不能捕食一头成年鸟脚亚目食草恐龙。

Most, but not all, were ornithopods.

绝大部分是鸟脚亚目食草恐龙。

When Ms Drumheller and Mr Boyd examined the bones of juvenile upper-Cretaceous ornithopods dug up in Utah they saw marks on one skeleton that looked suspiciously like those modern crocodiles inflict when biting and tearing at their prey.

当庄姆海勒与博依德对犹他州出土的垩纪年幼的鸟脚亚目食草恐龙的化石进行检查时，他们在一副骨架上发现了看上去像是遭受现代鳄鱼撕咬的痕迹。

Dinosaur fossils have been found on farms like these dinosaurs called ornithopods in China.

恐龙化石在中国的农田中被发现过，比如一种叫做鸟脚类恐龙的。

But we've also done it through histology, which is the sort of microstructure, in this case of the bones, and it matches a group of dinosaurs called ornithopods.

我们还通过组织学进行了验证，组织学研究的是微观结构，这里指的是骨骼的微观结构，结果与一类被称为鸟脚类恐龙的化石相吻合。

You might be familiar with some of the more famous species of ornithopod, like iguanodon, which comes from much, much later on in time.

你可能对一些更为著名的鸟脚类恐龙物种有所耳闻，比如来自较晚时期的禽龙。

Ornithopods started off as bipeds, but the larger hadrosaurus probably walked on all four legs most of the time.

鸟脚类动物一开始是两足动物，但体型较大的鸭嘴龙可能大部分时间都是四足行走。

There were teeth, vertebrae, and limb bones from the ornithopod Iguanodon.

有鸟脚类禽龙的牙齿、脊椎骨和四肢骨。

If we put these animals back on our generalized tree of dinosaur relationships, Ouranosaurus would be over here with the ornithopods, things like Hadrosaurus and Iguanodons.

如果我们把这些动物放回我们的恐龙关系树中，大王龙就会和鸟脚类动物一起出现在这里，比如鸭嘴龙和禽龙。

Admontosaurus and Iguanodon were both ornithopods.

Admontosaurus 和 Iguanodon 都是鸟脚类动物。

Which of these animals are ornithopods?

以下哪些动物是鸟脚类动物？