pour/throw cold water on
US /pɔr/θroʊ koʊld ˈwɔtər ɑn/
UK /pɔr/θroʊ koʊld ˈwɔtər ɑn/

1.
泼冷水, 打击积极性
to say or do something that discourages someone or makes them feel less enthusiastic about something
:
•
She was excited about her new business idea, but her parents poured cold water on it.
她对她的新商业想法很兴奋,但她的父母泼了冷水。
•
Don't throw cold water on his plans; he's really trying hard.
不要泼冷水在他的计划上;他真的很努力。