cold-blooded

剑桥词典

Cold-blooded animals can only control their body heat by taking in heat from the outside or by being very active .
（動物）冷血的
Snakes and lizards are cold-blooded animals . 蛇和蜥蜴都是冷血動物。
比較
warm-blooded

behaving in a very cruel way with no sympathy for other people
冷酷無情的，殘忍的
a cold-blooded murder 殘忍的謀殺 返回 cold-blooded