文章摘要：昆虫属变温动物，对环境温度具有很强的依赖性。

Abstr: Insects are ectotherms, and have strong dependence on environmental temperature.

鱼类是变温动物，其体温随环境的水温变化而变化。

Fish are poikilotherm whose body temperature changes as the ambient water temperature changes.

蟑螂是变温动物，也叫冷血动物，这意味着，与人类相比，他们需要的食物非常少。

Cockroaches are also poikilotherms, or cold-blooded, meaning they need much less food than humans do.

因为恐龙属于爬行动物，而现代的爬行动物都不属于恒温动物，所以长期以来恐龙都被当做是变温动物。

Because dinosaurs were reptiles, and modern reptiles are not endotherms, it was long assumed that dinosaurs were not endotherms.

“冷血”是外行的人对变温动物的叫法，它们的体温是随着周围的环境而变化，而不是像恒温动物那样内部自行调节体温的稳定。

"Cold-blooded" is the layman's term for ectotherms—animals whose body temperature is contingent on the surrounding environment, rather than internally regulated like that of warm-blooded creatures.