Compared to other endotherms, I'm pretty cool.

跟其他内温物比起来，我挺“冷”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恒温物。以极地恐龙论为例。

For example, mammals and birds are endotherms.

例如，物和鸟类都是恒温物。

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， 如果你是像我们这样的恒温物，旦体温开始下降，就可能迅速临死亡。

Is this turtle an ectotherm, or an endotherm?

这只乌龟是变温物还是恒温物？

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，演讲者认为极地地区在的部分时间足够温暖， 可以让非恒温物生存。

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是恒温物。

But the mouse is going to be an endotherm.

但是，这只老鼠将成为恒温物。

It's an adaptation that helps us, and other endotherms, retain more heat and water during respiration.

这是种适应，可以帮助我们和其他吸热物在呼吸过程保留更多的热量和水分。

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

这并不是说恒温物的体温也没有变化。

Typically, fast-growing, active endotherms have a type of bone tissue called fibrolamellar bone.

通常，快速生长、活跃的吸热物有种叫做纤维板层骨的骨组织。

In the first place, the author asserts that dinosaur fossils have been found in Polar Regions, where only endotherms could be active.

首先，作者断言在极地地区发现了恐龙化石，那里只有吸热物可能活跃。

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

这并不定意味着恐龙是为奔跑而生的高能恒温物。

Remember that endotherms are warm-blooded animals.

记住，恒温物是温血物。

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

例如，恐爪龙没有骨环，可能更像是恒温物。

The lecture opposes the viewpoint stated in the reading passage and argues that dinosaurs were not endotherms by providing three strong reasons.

讲座反对阅读文章陈述的观点，并通过提供三个强有力的理由论证恐龙不是恒温物。

They can also be called endotherms.

它们也可以被称为恒温物。

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

最后，恐龙是变温物还是恒温物的答案比看起来要复杂得多。

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

在此过程的某个地方，恐龙似乎变成了完全恒温物，就像现代鸟类样。

This difference in temperature-regulation means that endotherms can live in more variable environments and are usually more active than ectotherms.

这种温度调节的差异意味着吸热物可以生活在更多变的环境，并且通常比外温物更活跃。