you don't say!SURPRISEDused to show you are surprised by what someone has told you – also often used when you are not at all surprised by what someone has told you 不会吧！不至于吧！〔表示对某人所说的事表示惊讶，亦常用来表示一点也不觉得惊讶〕you don’t say!• "I think Bob and Susan are having an affair." "You don't say! That's been common knowledge for months."
→ you don’t say! at say1(SPOKEN SECT)