1、Birds are homoiothermous animals, which means they can regulate their body temperature to stay warm in different environments.
鸟类是恒温动物，这意味着它们可以调节体温，在不同的环境中保持温暖。

2、Mammals, including humans, are homoiothermous creatures because they can maintain a constant internal body temperature regardless of the external conditions.
哺乳动物，包括人类，都是恒温动物，因为它们可以在外界条件变化的情况下保持稳定的体温。