cold-blooded
adj
1 (biology 生) having a blood temperature which varies with the temperature of the surroundings 冷血的(血液溫度隨環境溫度的高低而改變的)
Reptiles are cold-blooded. 爬行動物是冷血的.
2 (derog 貶) (of people or actions) without pity; cruel (指人或行動)無情的, 殘酷的
a cold-blooded murderer, murder 殘忍的謀殺者、 謀殺.