Mammals are the group of animals that humans belong to!

人类属于哺乳类动物！

No mammal except man has more abundant cerebral matter.

任何哺乳类都没有这样丰富的脑髓神经。

The percentages are very different for different groups of mammals.

不同哺乳类动物群体的比例差异也很大。

But some scientists think mammals also have this capability.

但有些科学家认为哺乳类动物也有这种能力。

And as they get older they transition to feeding more on mammals.

当它们越来越大，就要转为喂它们较多的哺乳类。

We see similar hygiene-driven responses in some colony-living mammals.

在一些群居活的哺乳类动物身上也会看到出于卫的反应。

In most mammals, the placenta is confined behind a barrier of maternal cells.

大多数哺乳类动物的胎盘 被母亲体内的一层细胞屏障围着。

If we hunted all of the world’s wild mammals and birds they’d get us by for a few days.

猎食所有野哺乳类和鸟类，可以再多几天。

Because mammalian predators that stay below that number can exist on prey smaller than them.

因为体重在20公斤以下的哺乳类动物能以追捕体型较小的猎物为。

It's a tree-dwelling mammal about the size of a raccoon that's native to Southeast Asia.

这种产于东南亚地区在树上活的哺乳类动物，体型和浣熊相当。

Killing mammals was either just collateral damage or a form of protection against possible predators.

杀死哺乳类动物要么只是一种附带损伤，要么是一种防御潜在捕食者的形式。

Like birds, mammals are warm-blooded and breathe air.

和鸟类一样，哺乳类是恒温动物，呼吸空气。

You find it associated with play, and all mammals play.

你会发现笑是在玩耍中发的， 而所有的哺乳类动物都会玩耍。

In come amphibians, reptiles, dinosaurs and finally, mammals.

接下来就是会出现两栖动物，爬行动物，恐龙，最后是哺乳类动物。

The small mammals and the larger mammals just can't survive for that length of time on inundated islands.

大型或小型哺乳类都不能在淹没的岛上存那么长的时间。

Most mammals live on land but some such as whales and dolphins live in water.

大多数的哺乳类动物活在陆地上，例如鲸和海豚活在水中。

They are mammals, which means they are warm-blooded, they have fur, and they feed their babies milk.

它们是温血的哺乳类动物，长颈鹿表面有毛，用母乳喂养幼崽。

Small mammals are such an important part of the ecosystem for transporting seeds into different areas.

小型哺乳类是态系统中重要的一环，它们能把种子送往不同的地方。

Their top speeds clock in at just 0.25 kilometers per hour, making them the slowest mammal on the planet.

它们的最高时速只有 0.25 公里，是世界上最慢的哺乳类动物。

Even mammals that live in water must come to the surface to breathe!

即使哺乳类活在水中，也必须到水表面上呼吸！