他们甚至可以推算疟疾寄生虫为了在其他宿主比如哺乳动物上传播的进化比例。
They were able to estimate the rate at which malaria parasites would have had to diversify in order to spread to other hosts, like mammals.
更高级形式的动物，比如哺乳动物和鸟类，能够看、听、嗅、触摸和品尝。
Higher forms of animals, such as mammals and birds, can see, hear, smell, feel, and taste.
红狼以白尾鹿或者其他的一些小的哺乳动物为食，比如沼泽兔子、浣熊以及海狸鼠。
The red wolf diet consists mainly of white-tailed deer and small mammals such as swamp rabbits, raccoons, and nutria.
鸦科动物和一些哺乳动物有未雨绸缪的能力，比如把食物储存在它们以后能找到的地方。
Corvids and some mammals have the ability to plan for the future, to store food for instance, in places where they can find it later.
比如，当你在炎热的天气在户外行走，你会出汗，你的身体会自我降温，这是哺乳动物如何调节自身体温的典型例子。
Like when you walk outside on a hot day, you perspire, and your body cools itself down, a classic example of how a mammal regulates its own body temperature.
今天，我想看看哺乳动物的一些交流系统，尤其是灵长类动物，比如猩猩，黑猩猩，大猩猩。
Today, I'd like to look at some communication systems found in mammals, particularly in primates, such as orangutans, chimpanzees, gorillas.
科学家说，人类可能会先与哺乳动物“交谈”，然后是其他脊椎动物，比如鱼。
Scientists say that humans may first "talk" with mammals and then other vertebrates such as fish.
只有水生生物和在地下掘穴而居的动物成为极少的幸存者，比如海龟、小型哺乳动物和鳄鱼等。
Among the few survivors would have been animals living in water or burrowed in the ground like turtles, small mammals and crocodiles.
紫宸接受培训后亨利告诉她，他和泰特负责大型哺乳动物，因为他们觉得她太娇小，比如要她独自处理一具三十磅重的动物尸体会很困难。
After her training, Henry had told her that he and Ted would split the care of bigger mammals because they thought her too small, for instance, to dispose of a thirty-pound carcass by herself.
这个美丽的小动物将为我们揭示人类与其他哺乳动物之间的联系：比如与牛、羊、大象及食蚁兽等的联系。
This beautiful little creature is going to show us our connection with the rest of the mammals: with cows and sheep, and elephants and anteaters.
一些中等的哺乳动物，比如海狸以及北美野兔也是它们重要的第二食物来源。
Medium-sized mammals, such as beaver and snowshoe hares, can be an important secondary food source.
红狼以白尾鹿或者其他的一些小的哺乳动物为食，比如沼泽兔子，浣熊以及海狸鼠。
The red Wolf diet consists mainly of white-tailed deer and small mammals such as marsh rabbits, raccoons and nutria.
它们中的许多都是大型哺乳动物，比如犀牛、貘、大象、儒艮和海牛。
Many are large animals, such as rhinos, tapirs, elephants, dugongs and manatees.
比如有人在做同样的论点，比如我不相信鲸鱼是哺乳动物，我过去认为鲸鱼是鱼，鲸鱼显然是鱼，不是吗？
Say somebody was making the same argument, say I didn't believe whales were mammals, I thought whales are fish, whales are obviously fish aren't they?
一个多世纪以来，神经系统科学家相信人类以及其他哺乳动物的大脑与其他种类的动物有所不同，比如鸟类(而且我们的大脑大概要更优秀些)。
For more than a century, neuroscientists believed that the brains of humans and other mammals differed from the brains of other animals, such as birds (and so were presumably better).
比如，鸟有中空的骨头，昆虫根本就没有骨，而大部分哺乳动物都有坚固而又沉重的骨头，这就使得飞行变得很困难。
For example, birds have hollows bones, and insects have no bones at all. But most mammals have solid and heavy bones, which could make flying tough.
有60多种哺乳动物--比如说著名的飞天鼠--可以熟练的在树丛间滑翔。很酷吧！但是它们的进化优势是什么呢？
More than 60 mammal species—like the famous flying squirrel—have adapted the ability to sail from tree to tree. Thrilling, yes. But what's the evolutionary advantage?
对于其它的哺乳动物来说，比如狗，它眼里的世界只有黑和白。 …
对于其它的哺乳动物来说，比如狗，它眼里的世界只有黑和白。
To any other mammal, such as the dog, the world looks like a black and white photo.
比如家猫每日所需的蛋白质含量是普通哺乳动物的2-3倍。
Cats require high dietary protein which is 2-3 times compared to other mammals.
比如家猫每日所需的蛋白质含量是普通哺乳动物的2-3倍。
Cats require high dietary protein which is 2-3 times compared to other mammals.
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