中文拼音： zao3 zhi1 jin1 ri4 he4 bi4 dang1 chu1

中文繁体： 早知今日何必當初

英文翻译： if I (you, she, he...) had known it would come to this, I (you, she, he...) would not have acted thus (idiom)/to regret vainly one's past behaviour