Compared to other endotherms, I'm pretty cool.

跟其他内温动物比起来，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恒温动物。

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恒温动物。

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

在此过程中的某个地方，恐龙似乎变成了完全恒温动物，就像现代鸟类一样。

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

例如，恐爪龙没有骨环，可能更像是恒温动物。

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

这是一种适应，可以帮助我们和其他吸热动物在呼吸过程中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.

这并不是说恒温动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、活跃的吸热动物有一种叫做纤维板层骨的骨组织。

Is this turtle an ectotherm, or an endotherm?

这只乌龟是变温动物还是恒温动物？

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

最后，恐龙是变温动物还是恒温动物的答案比看起来要复杂得多。

Endotherms can make enough heat that they often don't need to rely on their environment to stay warm.

吸热可以产生足够的热量，以至于它们通常不需要依靠环境来保持温暖。

Besides, the reading passage states that dinosaurs had legs that were underneath the body, which is the feature of endotherms.

此外，阅读文章指出恐龙的腿在身体下方，这是恒温动物的特征。

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

讲座反对阅读文章中陈述的观点，并通过提供三个强有力的理由论证恐龙不是恒温动物。

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恒温动物。

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动物可以生活在更多变的环境中，并且通常比外温动物更活跃。

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，那里只有吸热动物可能活跃。

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一年中的部分时间足够温暖， 可以让非恒温动物生存。

Thanks to extensive studies on modern animals, we know that these bone cells or Osteons, are laid down in distinctive and different ways by endotherms and ectotherms.

由于对现代动物的广泛研究，我们知道这些骨细胞或骨细胞是由吸热动物和变温动物以独特和不同的方式产生的。

It turns out that this turtle is more endotherm like than ectotherm like, and is able to maintain a relatively stable internal body temperature.

事实证明，这只乌龟更像是恒温动物，而不是外恒温动物，能够保持相对稳定的体内温度。