you should have seen/heard something/someone idiom
你真该看看／听听（某事或某人）
seeing or hearing something or someone would have interested or entertained you very much
You should have seen her - she was furious! 你真该看看她那时的模样——她大发脾气！
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。