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

另一，乳动物（mammals）则是温动物（warm-blooded），好吧，绝大部分乳动物是这样。

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

乳动物和温动物，意味着它们能持续保持身体的温度。

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

它们是脊椎动物，也就是说它们有脊柱，和乳动物一样，它们是温动物。

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

它们是温动物。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, 而类则是温动物。

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，被认为是温动物，至少我们大多数如此。

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

和鸟类一样，乳类是温动物，呼吸空气。

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

这是因为我们是乳动物——我们是温血动物(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.

斑马是乳动物，这意味着它们是温动物，覆盖着皮毛，而且用奶喂孩子。

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，这种生长一直被认为是乳动物和鸟类等温动物所特有的。

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

他们认为这些论点并不能证明恐龙是温动物。以极地恐龙论为例。

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是温动物。

Is this turtle an ectotherm, or an endotherm?

这只乌龟是变温动物还是温动物？

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

例如，恐爪龙没有骨环，可能更像是温动物。

That doesn't necessarily mean dinosaurs were high-energy endotherms built for running.

这并不一定意味着恐龙是为奔跑而生的高能温动物。

Somewhere along the way, it seems that dinosaurs became full endotherms, like modern birds.

在此过程中的某个地，恐龙似乎变成了完全温动物，就像现代鸟类一样。

In the end the answer whether dinosaurs were ectotherms or endotherms is much more complicated than it seems.

最后，恐龙是变温动物还是温动物的答案比看起来要复杂得多。

However, the lecture points out that similar leg position does not necessarily mean that the dinosaur was endotherm.

不过，讲座指出，类似的腿部姿势并不一定意味着恐龙是温动物。

This isn't to say that Endotherms don't also have some variability in their body temperature.

这并不是说温动物的体温也没有变化。

Animals like this, that control their body temperature in a variety of ways, are mesothermic, and today they're pretty rare.

像这样以多种式控制体温的动物是温动物，如今它们非常罕见。