早期的兽脚亚目食肉恐龙，包括从迅猛龙到霸王龙在内的所有肉食物种，抢占了地盘并茁壮成长。
Early therapods, the group of dinosaurs that includes all meat-eating species from Velociraptor to Tyrannosaurus rex, gained ground and thrived.
尽管有许多证据表明鸟类是从陆生兽脚亚目恐龙进化而来的，但一些科学家仍然表示怀疑。
Although many lines of evidence indicate that birds evolved from ground-dwelling theropod dinosaurs, some scientists remain unconvinced.
这种反对是合理的，因为只有早期的兽脚亚目食肉恐龙的锁骨才被发现，但是现在已经发掘出了类似始祖鸟的叉骨的兽脚亚目食肉恐龙锁骨化石。
This objection was reasonable when only early theropod clavicles had been discovered, but fossilized theropod clavicles that look just like the wishbone of Archaeopteryx have now been unearthed.
所有这些羽毛类型在兽脚亚目的印痕化石中都被找到了，兽脚类属于恐龙亚目，包括了雷克斯霸王龙、鸟类以及其他手盗龙。
All these feather types have been found in fossil impressions of theropods, the dinosaur suborder that includes Tyrannosaurus rex as well as birds and other Maniraptorans.
此次大灭绝之前，兽孔目爬行动物（一种类哺乳动物）的数目远远多于恐龙的祖先祖龙。
Until this disaster, mammal-like creatures known as therapsids were actually more numerous than the ancestors of the dinosaurs, known as archosaurs.
奥古斯塔纳大学（Augustana College）的威廉·汉莫（William Hammer）发现了这种新的生物——一头四到五英尺的鸟臀目恐龙，他认为它与法布尔龙或畸齿龙有血缘关系。
William Hammer of Augustana College found the new creature -- a four- to five-foot ornithischian or bird-hipped dinosaur that he believes is related to the fabrosaur or heterodontosaur.
兽脚亚目食肉恐龙是早期的有翼和羽的恐龙，其主要靠后足行走且不会飞行。
Theropods were early winged and feathered dinosaurs that walked mainly on their hind legs and were incapable of flight.
科学家们一直认为羽毛最初出现在兽脚亚目恐龙的某个早期成员身上，该成员最后进化为鸟类。
Until recently it was thought that feathers first appeared in an early member of the lineage of theropods that leads to birds.
可能已经是时候最终接受‘始祖鸟’只是又一只在侏罗纪时期飞来飞去的长有羽毛的像鸟类的小兽脚亚目食肉恐龙了。
Perhaps the time has come to finally accept that archaeopteryx was just another small, feathered, bird-like theropod fluttering around in the Jurassic.
这些恐龙都是更大更壮的鸟臀目恐龙，例如剑龙、甲龙和鸭嘴龙的先祖。
These dinosaurs were the forerunners of the bigger and more spectacular ornithischians like stegosaurus, ankylosaurus and the duck-billed dinosaurs.
但新种恐龙也有类似蜥脚下目恐龙或雷龙的属性，这些恐龙长得很巨大，长颈，鞭尾，用四只脚到处爬行。
But the new species also has similar attributes to dinosaurs known as sauropods, or brontosaurs, that grew to massive sizes and went about on all fours with long necks and whip-like tails.
汉莫除了发现了这条恐龙的更多部位以外，还发现了一条大型蜥脚类动物，或食草类恐龙，类似于梁龙，以及这条新的、尚无任何描述的鸟臀目恐龙。
Hammer found more parts of that dinosaur as well as a large sauropod, or plant-eater, resembling a diplodocus, and the new, as-yet-undescribed ornithischian.
这只恐龙很可能是原始的蜥脚类亚目动物——长颈、四条腿的食草动物，类似于我们较为熟悉的腕足类恐龙。
The animal would have been a primitive sauropod — a long-necked, four-legged grazer similar to the better known brachiosaurs.
无论如何，从那时开始，科学家已经找到了一定数量的保存完好的，拥有类似羽毛结构的兽脚亚目恐龙化石，这种结构和羽毛绒还有羽毛叶片符合得很好。
Since then, however, scientists have found a number of well-preserved theropod fossils with many more featherlike structures, corresponding to downy feathers and feathers with vanes.
在与现代鸟类亲缘关系较为接近的兽脚亚目恐龙身上存在一块特殊的楔形腕骨，正是这块腕骨的存在它们的前肢才能得以弯曲。
In the theropods that were closely related to living birds, a particular wristbone was wedge-shaped, allowing them to bend their hands.
一些是小型食肉恐龙——正如庄姆海勒与博依德所确认的鳄鱼目动物那样，这些恐龙会截杀年幼离群的食草恐龙。
Some were small carnivorous dinosaurs-the sort that might pick off young stragglers in the way that the crocodilians identified by Ms Drumheller and Mr Boyd did.
任一种蜥蜴目爬行动物，包括蜥蜴，在以前分类中还包括鳄鱼和恐龙。
Any of various reptiles of the suborder Sauria, which includes the lizards and in former classifications also the crocodiles and dinosaurs.
这种结构最终被证实是极其原始的羽毛——且存在于陆生的兽脚亚目恐龙身上。
At last there was evidence of truly primitive feathers—found on a ground-running theropod.
白垩纪被称为鸟脚亚目食草恐龙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。
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.
但无可争辩的是，这颗牙是第一个鳄鱼目动物拿恐龙当点心的证据。
Nevertheless, this tooth is the first unarguable proof that crocodilians did indeed snack on dinosaurs.
结合对这个地区的分析，两位研究者认为他们所发现的是一个遭到鳄鱼目动物偷袭的恐龙筑巢地。
By combining that with an analysis of the whole site, the two researchers argue that what they have discovered is a dinosaur nesting ground that was being raided by crocodilians.
恐龙一种，主要生活在中生代时期的陆栖动物，是庞大的食肉或食草爬行类动物，属龙盘目与鸟盘目，已绝种。
Dinosaur, any of various extinct, often gigantic, carnivorous or herbivorous reptiles of the orders saurischia and ornithischia that were chiefly terrestrial and existed during the Mesozoic era.
在那样一种环境下，即便是一头巨大的兽脚亚目食肉恐龙也会不时回头张望。
In that sort of environment even a big theropod would constantly have been looking over its shoulder.
该恐龙残骸属于鸟脚亚目恐龙（象有腿和脚的鸟一样） ，据吉林大学博物馆馆长金利勇讲。
The fossilized remains belonged to the ornithopod ( having legs or feet like those of a bird ) family. said jin liyong, curator of the museum of jilin university.
这是一种兽脚亚目肉食恐龙。
自恐龙复原图从1970年以来，许多研究指出现代鸟类极可能是兽脚亚目恐龙的直系后代。
Since the dinosaurs recovery plans since 1970, many studies have pointed out that modern birds most likely suborder Theropoda a direct descendant of dinosaurs.
自恐龙复原图从1970年以来，许多研究指出现代鸟类极可能是兽脚亚目恐龙的直系后代。
Since the dinosaurs recovery plans since 1970, many studies have pointed out that modern birds most likely suborder Theropoda a direct descendant of dinosaurs.
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