in cold blood
冷血地、冷酷无情地
书面/口语·形容残忍行为
英文释义
without emotion or mercy; in a ruthless or calculated manner
例句
The murderer killed his victim in cold blood, without any provocation.
典故来源
源自16世纪，'cold blood'比喻无情感状态，与热血冲动相对，强调冷酷预谋。