I hate to burst your bubble.
burst one' s bubble :打破幻想
A: I dream of going to study at Harvard University.
我梦想能到哈佛读书．
B: I' m sorry to burst your bubble, but your grades are too low. You' ll never get accepted to Harvard.
我抱歉我打碎你的美梦，你分太低，哈佛不会录取你的．
My little sister thinks that Santa Claus is real. Don' t burst her bubble by telling her that he isn' t.
我妹妹认为圣诞老人是真的，别告诉她那是假的以免她失望．