Definition
To spoil someone's plans or enthusiasm.
泼冷水；扫兴；破坏别人的兴致
I don't want to rain on your parade, but this project might not be as successful as you expect.
我不想泼你冷水，但这个项目可能不会像你预期的那么成功。
She always likes to rain on other people's parades, which is very discouraging.
她总是喜欢泼别人冷水，这真的很让人沮丧。
I was really looking forward to the trip, but his negative comments really rained on my parade.
我真的很期待这次旅行，但他的负面评论真的让我扫兴。