今天，让我们来看看一种爬行动物，一种在过去七千万年里没有进化很多的食肉动物。
For today, let's look at a reptile, a predator that hasn't evolved much in the last seventy million years.
变色龙是一种爬行动物，主要生活在热带。
The chameleon is a reptile that mainly lives in tropical zones.
蛇是一种爬行动物。
在残骸中，罕有幸存的同一时期陆地生物的碎片，包括部分松树和一种爬行动物古蜥的牙齿。
Among the remnants are rare fragments of land life that survived the same period, including part of a conifer plant and the tooth of an archosaur reptile.
尾羽龙有一种有趣的爬行动物和鸟类的混合解剖特征。
Caudipteryx has an interesting mix of reptile and bird-like anatomical features.
不论皮肤多么干燥，你永远不会变成美洲鳄或任何其他一种皮肤粗糙的爬行动物。
No matter how dry your skin gets, you will never turn into an alligator or any other type of reptile.
这种食肉动物已被确认为一种上龙，上龙是一类已经灭绝了的水生爬行动物，有巨大的头骨，粗短的脖子，还有令它们在水里来去自如的四只脚蹼。
The predator has been identified as a new species of pliosaur, a group of extinct aquatic reptiles that had huge skulls, short necks and four flippers to power them through the water.
但科学家们观察到，不同于那些通常是爬行动物捕食对象的昆虫，一种特殊种类的昆虫却以蛇类和龟为食。
But unlike insects that often fall prey to reptiles scientists have observed one particular species of bug eating snakes and a turtle.
鸟类的祖先很可能是一种具鳞的小型四足爬行动物，生活在森林的树冠上，经常从一棵树跳到另一棵树上。
Imagine the ancestors of birds as small, scaly, four-legged reptiles living in forest canopies, leaping from tree to tree.
这是一种对抗鸟类、爬行动物、两栖动物等袭击的基本防卫手段。
It's basically a defense against birds, reptiles, amphibians, that sort of thing.
他们宣称，始祖鸟不是爬行动物和鸟类之间的那一节链条——只是一种已经灭绝的，具有爬行动物特征的鸟类而已。
They argue thatArchaeopteryx is not a missing link between reptiles and birds — it isjust an extinct bird with reptilian features.
所以这样看来，变色龙效应远非是冷血的爬行动物的一种自我保护，而确实是对促进社交互动而表现出的热情响应。
So the 'chameleon effect', far from being the preserve of cold-blooded reptiles, is actually a warm response facilitating social interactions.
因为鸟类羽毛和爬行动物的鳞片都包含黑素体——这是一种微小的囊状结构，其中包含了各种各样的黑色素，于是很多古生物学家开始怀疑恐龙羽毛是否也含有黑素体。
Bird feathers and reptile scales contain melanosomes-tiny sacs holding varieties of the pigment melanin. Many paleontologists suspected that dinosaur feathers also contained melanosomes.
日前，古生物学家公布了一种生活在2.35亿年前、会"飞行"的爬行动物孔耐蜥。
Paleontologists have unveiled an extraordinary prehistoric 'flying' reptile kuehneosaurs which lived 235m years ago.
这种古老的爬行动物背上有着标志性的船帆状背鳍，它常常会被误认为是一种恐龙，甚至出现在恐龙玩具中。
This reptile, with its iconic sail-shaped back, is often mistakenly identified as a dinosaur, and is even included in packages of toy dinosaurs.
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.
一亿两千万年前，白垩纪的海洋覆盖着现在的澳大利亚南部，一条鱼龙（注：一种类似鱼和海豚的大型海栖爬行动物）经历了十分糟糕的一天。
One hundred and twenty million years ago, when a Cretaceous sea covered what is now South Australia, an ichthyosaur had a really bad day.
科学家们发现的最大型的动物便是海龙化石，这是一种海洋爬行动物，大概有十米长，他以捕食较大的鱼类为食。
The largest creature the scientists found was a thalattosaur, a marine reptile about 10 long, which would have preyed on the larger fishes there.
上龙属于一种蛇颈龙，蛇颈龙是一亿五千万年前统治海洋的一种大型水栖爬行动物，其存在时期约与恐龙游荡地球同期。
Pliosaurs were a form of plesiosaur, a group of giant aquatic reptiles that terrorised the ocean 150m years ago, around the same time that dinosaurs roamed the Earth.
两种大型爬行动物，美国东南部的密西西比鳄或中国的扬子鳄中一种，它们有尖利的牙齿和有力的颚部。
Either of two large reptiles, Alligator mississipiensis of the southeast United States or A. sinensis of China, having sharp teeth and powerful jaws .
他提出一个假说，说那些骨头属于一种已绝种的爬行动物。
He put forward the hypothesis that the bones belonged to an extinct type of reptile.
和大部分爬行动物不同，它是一种大形的无颞窝爬行动物，它靠身子下面的脚来支撑它庞大的身躯。
It was a large anapsid reptile that, unlike most reptiles, held its legs underneath its body to support its great weight.
任一种小型已灭绝的翼龙目的飞行爬行动物，它们绝大多数都没有尾巴，生活在侏罗纪和白垩纪之间的那段时期。
Any of various small, mostly tailless, extinct flying reptiles of the order Pterosauria that existed during the Jurassic and Cretaceous periods.
蛇是一种无足爬行动物。
蜥蜴一种属于蜥蜴类目的爬行动物，特征是有带鳞狭长的身体、可移动的眼睑、四条腿和渐细的尾巴。
Any of numerous reptiles of the suborder Sauria or Lacertilia, characteristically having a scaly elongated body, movable eyelids, four legs, and a tapering tail.
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.
每一种哺乳动物、鸟类和大多数爬行动物、两栖类动物和鱼类都需要睡眠来维持正常的生命活动。
Each kind of mammals, birds and most reptiles, amphibians animals and fish are in need of sleep to maintain normal life activities.
这种无眼的爬行动物虽然看起来像蛇类，但是它确实是生活在地面上，蜥蜴的一种。它的腿在进化中消失，它只能够以摇摆身体的方式推动土壤前进。
The blind reptile looks like a snake, but it is actually a lizard that has evolved to live underground - losing its legs to enable it to push through the soil by wriggling its body.
剩下的化石属犬齿兽——一种冷血、像爬行动物的动物，它们是现代哺乳动物的祖先。
The rest are cynodonts, cold-blooded, reptile-like animals he ancestors of modern mammals.
剩下的化石属犬齿兽——一种冷血、像爬行动物的动物，它们是现代哺乳动物的祖先。
The rest are cynodonts, cold-blooded, reptile-like animals he ancestors of modern mammals.
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