Fish are poikilotherm whose body temperature changes as the ambient water temperature changes.
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3. 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.
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4. 其原因是：像蛇和鳄鱼等变温动物排列在食物来源如昆虫的顶部，将会产生重大的影响。
The reason: ectotherms range from food sources like insects to top predators like snakes and crocodiles, the loss of which would have "major flow-on effects, " Shine says.
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5. 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.
"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.
Unlike mammals, lizards and other reptiles are cold-blooded, meaning they can't regulate their body temperatures and so must seek shade when it gets too hot.
Unlike mammals, lizards and other reptiles are cold-blooded, meaning they can't regulate their body temperatures and so must seek shade when it gets too hot.
