Most, but not all, were ornithopods.

绝大部分是鸟脚亚目草恐龙。

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

大到足以捕杀一鸟脚亚目草恐龙。

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

这样掠者本不能捕一鸟脚亚目草恐龙。

Unless, of course, the top predator of the system-the one that could hunt down adult ornithopods-was not a dinosaur at all.

当然除非生态顶级掠者--即是能捕杀鸟脚亚目草恐龙--并不完全是恐龙。

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恐龙其地位相当于斑马和羚羊--每部有关非洲大草原纪录片中被捕杀种群。

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白垩纪幼鸟脚亚目草恐龙化石进行检查时，他们在一副骨架上发现了看上去像是遭受现代鳄鱼撕咬痕迹。