拼音：duì niú gǔ huáng
注音：ㄉㄨㄟˋㄋㄧㄡˊㄍㄨˇㄏㄨㄤˊ
解释：比喻对不懂事理的人讲理或言事。常含有徒劳无功或讽刺对方愚蠢之意。同“对牛弹琴”。
出处：《庄子·齐物论》“彼非所明而明之，故以坚白之昧终”晋·郭象注：“是犹对牛鼓簧耳，彼竟不明，故己之道术终于昧然也。”
It refers to reasoning or saying things to people who don't understand reason. It often implies futility or sarcasm at the stupidity of the other party. Same as "casting pearls before swine".
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