表达 “throw cold water on something” 的意思是 “给一个想法、计划或情况泼冷水”。其中，动词 “throw” 可以用 “pour” 替换，即 “pour cold water on something”，用 “pour” 所表达的否定态度没有 “throw” 那么强烈。

例句
Roberta wanted to build a statue of her hero out of clay, but Jenkins threw cold water on the idea.
萝贝塔想为她的英雄建造一座土雕像，但詹金斯给这个想法泼了盆冷水。

The boss poured cold water on my idea when he heard the proposed budget for the project.
老板听了我的项目预算提案后，给我泼了一盆冷水。

Martin felt that cold water had been thrown on his plans after everyone laughed at his intentions.
在大家都嘲笑了他的意图后，马丁觉得自己的计划被泼了冷水。