曾经鸟和爬行类共同协作。
爬行类具有覆盖着鳞片的干燥皮肤。
爬行类蛇颈龙科亚目的一属。
这是北美洲两栖爬行类研究中心的网站。
This is the website of the Center for North American Herpetology.
科学家证明鱼类和爬行类在人类纪之前就已存在。
Scientists show that fishes and reptiles existed before the age of man.
在这之后出现了鱼类，爬行类，哺乳动物，蕨类，针叶树和开花的植物。
They were followed by the emergence of fish, reptiles, mammals, ferns, conifers and flowering plants.
以保存完整精美、数量巨大的海生爬行类和棘皮动物海百合为标志。
Marine reptiles and echinoderm crinoid that feature intact and delicate preservation and large quantity serve as the mark.
让赖歇特感到吃惊的是，他发现哺乳类的两块耳骨与爬行类颚部的一些骨片相吻合。
He was astonished to find that two of the ear bones in mammals corresponded to pieces of the jaw in reptiles.
鱼龙和鲸类的另一点相似在于：不像其他目前存活的卵生爬行类，他们胎生生下后代。
Ichthyosaurs also resembled cetaceans in another way: unlike most living reptiles, which lay eggs, they gave birth to live young.
最大的澳洲野生动物园有200多种当地鸟类、哺乳类和爬行类两栖动物。
There are more than 200 species of native birds, mammals and reptiles in the largesf collection of Australian wildlife.
最后还讨论一些突触的功能以及爬行类前背侧室嵴与哺乳类新皮层之间的关系。
In the end, the functions of some synapses and the relation between ADVR of reptile and the neocortex of mammal were discussed.
但在鸟类、爬行类、节肢动物和两栖类动物细胞内不能复制，而在仓鼠与豚鼠中。
But in the birds, crawling class, the arthropod and the amphibians zooblast cannot duplicate, but in hamster and guinea pig.
爬行类和鸟类只有很少的心理活动，灵长类有很多，而人类的心理活动就非常多了。
Reptiles and birds have a little bit about it — of it - and primates have a lot and humans have a real lot.
许多恐龙的足迹显示它们的行动与鸟类和哺乳动物一样快，比一般的爬行类要快得多。
Many dinosaur track - ways show that dinosaurs walked as fast as do birds and mammals, and much more rapidly than can be sustained by reptiles.
在奥陶纪、志留纪、泥盆纪、石炭纪，相继出现低等鱼类、古两栖类和古爬行类动物。
In the Ordovician, Silurian Period, the Devonian, Carboniferous, the advent of low amphibians and ancient ancient reptiles.
舒宾写道：“结论不可避免：构成爬行类颚部一部分的鳃弓，同样也构成了哺乳类的耳骨。”
Shubin writes: "the conclusion was inescapable: the same gill arch that formed part of the jaw of a reptile formed ear bones in mammals."
可卡因并不是随便的比喻，爬行类的大脑，神经系统最原始的部分之一，在人类熟睡后生产大量的多巴胺。
And cocaine is more than an idle metaphor. The reptilian brain — one of the nervous system's most ancient parts — floods you with dopamine, just as it does after you snort a line of blow.
在这些研究过的动物种群中，至少有750种鱼、290种爬行类、150种两栖类面临风险。
Of those studied, at least 750 fish species, 290 reptiles, and 150 amphibians are at risk.
这种爬行类异族人的科技像食尸鬼一样，以被迫为奴的人的生命能量为动力。 西鲁人重创巴库拉舰队。
Reptilian aliens with a ghoulish form of technology powered by the life energies of unwilling slaves, the Ssi-ruuk had crippled the Bakuran fleet.
尽管同为爬行类的其他恐龙只能在地上跑来跑去，但事实上，翼龙并非真正的恐龙，把它们当作恐龙是个小小的错觉。
Although reptiles like the dinosaurs were plodding on the ground below them, they were not actually dinosaurs themselves - a common misconception.
鸭嘴兽介于哺乳类与爬行类之间，因为它仍然具备许多爬行动物的特征，如产卵，而这些特征在我们身上已经消失了。
And that puts them somewhere between mammals and reptiles, because they still maintain quite a lot of reptilian characteristics that we've lost, for instance they still lay eggs.
但是，他说，在这些人自鸣得意之前，要知道，他们不过是回到了鸟类、两栖类和爬行类动物已拥有了亿万年的能力。
But before they pat themselves on the back for their superior evolution, he said, it's important to note that humans are just getting back to where birds, amphibians and reptiles have been for eons.
她补充说：“我们可以由鸭嘴兽来跟踪那些改变：我们是如何由爬行类进化到体表被毛，胎生，哺乳喂养后代等等。”
She added, "So we can use them to trace the changes that have occurred as we went from being a reptile, to having fur to making milk to having live-born young."
我们的色觉依旧是演化改造工程的结果，比起鸟类与许多爬行类及鱼类的四色视觉系统，我们还是少了一个色素。
Ours is still the result of an evolutionary reclamation job and remains one pigment short of the tetrachromatic visual system found in birds and in many reptiles and fish.
如果“始祖鸟”是一只恐龙，这意味着飞行能力在脊椎动物史里进化了至少4次：爬行类、鸟类、恐龙，还有最近的一次——蝙蝠。
If Archaeopteryx was a dinosaur, this means flight evolved at least four times in vertebrates: in reptiles, birds, dinosaurs, and most recently in bats.
如果“始祖鸟”是一只恐龙，这意味着飞行能力在脊椎动物史里进化了至少4次：爬行类、鸟类、恐龙，还有最近的一次——蝙蝠。
If Archaeopteryx was a dinosaur, this means flight evolved at least four times in vertebrates: in reptiles, birds, dinosaurs, and most recently in bats.
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