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

这样的掠者本不能捕一头成年鸟脚亚目草。

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草。

Most, but not all, were ornithopods.

绝大部分是鸟脚亚目草。

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物--鸟脚物，或者是一种大型兽脚物。

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

在中国的农场里发现了似这些被称为鸟脚的化石。

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

有鸟脚禽的牙齿、脊椎骨和四肢骨。

Admontosaurus and Iguanodon were both ornithopods.

Admontosaurus 和 Iguanodon 都是鸟脚物。

Which of these animals are ornithopods?

以下哪些物是鸟脚物？

They wanted to see whether a theropod could have made the large tracks, or whether it was an ornithopod.

他们想看看兽脚物是否可以留下大足迹，或者它是否是鸟脚物。

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

鸟脚物一开始是两足物，但体型较大的鸭嘴可能大部分时间都是四足行走。

Instead, they looked like the tracks of a large ornithopod, like Muttaburrasaurus, which is known from other sites in Australia.

相反， 它们看起来像是大型鸟脚物的足迹，例如在澳大利亚其他遗址发现的 Muttaburrasaurus。

The most common tracks were given the ichnogenus name Wintonopus and are thought to have been made by small ornithopod dinosaurs.

最常见的足迹被命名为 Wintonopus，被认为是由小型鸟脚制造的。

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目草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杀的种群。

Some dinosaur tracks are pretty easy to identify, but the differences between the tracks of theropods and ornithopods can be much harder to spot.

一些足迹很容易识别，但兽脚和鸟脚足迹之间的差异可能更难发现。

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.

如果我们把这些物放回我们的关系树中，大王就会和鸟脚物一起出现在这里，比如鸭嘴和禽。

They both have three-toed prints, and while theropods often have longer toes that end in sharp claws instead of the rounded toes of ornithopods, this detail is not always preserved.

它们都有三趾脚印， 虽然兽脚物的脚趾通常较长， 末端有锋利的爪子， 而不是鸟脚物的圆形脚趾，但这一细节并不总是被保留下来。

In the footprints made by the model, the claw imprints weren't always visible, which means that the tracks from a large theropod could easily be mistaken for those of an ornithopod.

在模型留下的脚印中，爪印并不总是可见的，这意味着大型兽脚物的脚印很容易被误认为是鸟脚物的脚印。

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白垩纪年幼的鸟脚亚目草的化石进行检查时，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。

The 3300 tracks preserved represent at least 130 different dinosaurs, all but two of whom - our large mystery dinosaur and another ornithopod who came and went before the action - were Wintonopus or Skartopus trackmakers.

保存下来的 3300 条足迹代表了至少 130 种不同的，其中只有两种——我们的大型神秘和另一只在行前来来往往的鸟脚——都是 Wintonopus 或 Skartopus trackmakers。