大多数爬行动物通过在陆地产卵进行繁殖。
蛇，龟和鳄鱼都是爬行动物。
巨型蟾蜍和安第斯鬣蜥是爬行动物的代表。
The Giant Toad and Andean Iguana are some examples of reptiles.
海龟是带壳的爬行动物。
鳄鱼是爬行动物。
沙漠很整洁，因为里面没有杂草，没有爬行的东西。
Deserts were tidy because there were no weeds in them, nothing that crawled.
我的意思是，鳄鱼的大脑是所有爬行动物中最发达的。
I mean, crocodiles' brains are the most developed of any reptile.
虽然爬行动物身上通常都有鳞片，但翼龙的皮可能有很多毛。
Although scales typically cover reptiles, the pterosaurs probably had hairy coats.
从那种意义上来说，比起其他爬行动物的大脑它们更接近哺乳动物的大脑。
In that sense, they are closer to mammals' brains than other reptiles' brains.
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.
一些科学家认为，许多种类的恐龙的新陈代谢更像温血哺乳动物，而不是冷血爬行动物。
Some scientists contend that many species of dinosaur had a metabolism more like a warm-blooded mammal's than a cold-blooded reptile's.
道德推理的最基本形式——在道德上相当于学会爬行——是将他人的利益与自己的利益进行权衡。
The most elementary form of moral reasoning—the ethical equivalent of learning to crawl—is to weigh others' interests against one's own.
爬行动物的骨骼生长在本质上是周期性的，在骨头上产生一系列的同心圆，就像树木的年轮一样。
Bone growth in reptiles is periodic in nature, producing a series of concentric rings in the bone, not unlike the growth rings of a tree.
这将使机器人可以在胃肠道周围爬行，用适当的外科手术工具施行治疗，且可以进行活体组织检查。
This will allow the robot to crawl around the gastrointestinal tract, perform treatment with appropriate surgical tools, and perform biopsies.
虽然现代爬行动物一般不会形成纤维板层骨，但在最佳环境下长大的幼年鳄鱼却能形成纤维板层骨。
Although modern reptiles generally do not form fibro-lamellar bone, juvenile crocodiles raised under optimal environmental conditions do.
曾经是海底的陆地现在成了城镇周围广阔肥沃的田野；这里曾经有过螃蟹爬行，现在则有驴子择路而行。
Land that was once at the bottom of the sea now lies around the town in wide, fertile fields; where crabs once crawled, donkeys pick their way.
例如，许多婴儿都能非常熟练地爬行，但他们却决定尝试行走，因为当他们站直时，有更多的东西能看和做。
For instance, many babies are perfectly proficient crawlers, but they decide to try walking because there's more to see and do when they stand upright.
九岁时，他的父亲，一位在昆士兰海岸开设爬行动物公园的博物学家，教他在夜间跟踪鳄鱼并把它们拖出水面。
At nine, his father, a naturalist who had started a reptile park on the Queensland coast, taught him to stalk crocs at night and lug them out of the water.
其他海龟都不能游到它所能游到的寒冷的北部和南部海域，而且它处理寒冷水域的方式在爬行动物中是独一无二的。
It swims farther into the cold of the northern and southern oceans than any other sea turtle, and it deals with the chilly waters in a way unique among reptiles.
然而，到了20世纪80年代，巴克的论点开始受到质疑，因为许多科学家在各种恐龙的骨骼中发现了与现代爬行动物相似的生长环。
In the 1980's, however, Bakker's contention began to be questioned, as a number of scientists found growth rings in the bones of various dinosaurs that are much like those in modern reptiles.
我们匍匐着四处爬行。
鱼龙是与恐龙同时代的爬行动物，它有鳍和流线型的身体。
Ichthyosaurs were reptilian contemporaries of the dinosaurs, with fins and streamlined bodies.
它们的头骨、骨盆和后脚属于爬行动物。
她更羡慕那些用细长的腿在灌木丛、石头和陡峭的山坡上爬行的山羊。
She envied even more the goats that climbed over bushes, stones, and steep inclines with their slender legs.
这种细长蜿蜒的身体能让陆地上的蛇在茂密的草丛中爬行，也能让水蛇在水中游动。
The elongated, serpentine body that allows land snakes to slither through dense grass also serves aquatic snakes in propelling through the water.
这是盘龙目爬行动物的一科。
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.
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.
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