So with our relatively high unchanging body temperatures you and I are considered warm-blooded, most of us anyway.

我们的体温相对稳定，被恒温动物，至少我们大多数人如此。

Mammals, on the other hand, are warm-blooded -- well, for the most part.

另一方面，哺乳动物（mammals）则恒温动物（warm-blooded），好吧，绝大部分哺乳动物这样。

Mammals are warm-blooded, which means that they maintain a constant internal body temperature.

哺乳动物和恒温动物，意们能持续保持身体的温度。

These guys are warm-blood. They need to eat frequently.

们恒温动物。需要经常吃东西。

For this reason the frog's blood is cold, while our blood is warm.

因此, 青蛙属于冷血动物, 而人类则恒温动物。

She added that this kind of growth has long been considered special to warm-blooded animals like mammals and birds.

她补充说，长期以来，这种生长一直被哺乳动物和鸟类等恒温动物所特有的。

This is because we're mammals-we're warm-blooded. We've evolved to be good at maintaining a warm body temperature.

这因我们哺乳动物——我们温血动物(恒温动物)。我们经过进化，变得很擅长维持温暖的体温。

Zebras are mammals, which means they are warm blooded, are covered in fur, and feed their babies milk.

斑马哺乳动物，这意们恒温动物，覆盖皮毛，而且用奶喂孩子。

They are vertebrates, which means they have backbones, and, like mammals, they are warm-blooded.

们脊椎动物，也就说们有脊柱，和哺乳动物一样，们恒温动物。

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

和鸟类一样，哺乳类恒温动物，呼吸空气。

They don't think those arguments prove that dinosaurs were endotherms. Take the polar dinosaur argument.

他们这些论点并不能证明恐龙恒温动物。以极地恐龙论例。

It's not clear whether these warm-blooded animals outcompeted the running crocodilians, but it's possible.

还不清楚这些恒温动物否在竞争中击败了奔跑的鳄鱼类，但这有可能的。

Mammals are warm-blooded animals that have fur or hair, give birth to live offspring, with a few exceptions, and produce milk to feed their young.

哺乳动物恒温动物，拥有毛发或皮毛，大多数情况下直接生下活体幼崽，并分泌乳汁哺育后代，尽管存在少数例外。

Is this turtle an ectotherm, or an endotherm?

这只乌龟变温动物还恒温动物？

Deinonychus, for example, has no bone rings, and was probably more like an endotherm.

例如，恐爪龙没有骨环，可能更像恒温动物。

In contrast, the speaker believes that the Polar Regions were warm enough during part of the year for animals that were not endotherms to live.

相比之下，演讲者极地地区在一年中的部分时间足够温暖， 可以让非恒温动物生存。

So the presence of dinosaur fossils in polar regions doesn't prove the dinosaurs were endotherms.

因此，极地地区存在恐龙化石并不能证明恐龙恒温动物。

For example, mammals and birds are endotherms.

例如，哺乳动物和鸟类都恒温动物。

And so birds and mammals have this morphological change and they did it because they're endothermic.

而且鸟类和哺乳动物发生了这种形态学变化，这因们恒温动物。

And so if you're an endotherm, warm-blooded critter like we are, once your body temperature starts to drop off, then you can quickly die.

因此， 如果你像我们这样的恒温动物，一旦体温开始下降，就可能迅速面临死亡。