1. About 200 million years ago, warm-blooded animals took to the air — the first birds.
    大约2亿年前，温血动物开始在天空中飞翔——它们是最早的飞鸟。

2. Some warm-blooded animals, like the cat , the dog or the wolf, do not need to hibernate.
    有些温血动物, 如猫,狗,或狼, 不需要冬眠.