拼音缩写是「bdkn」的词

读音：biān dǎ kuài niú 词语解释鞭打快牛[ biān dǎ kuài niú ]⒈  越是走得快的牛，越是用鞭子打它，让它走得更快。比喻赏罚不明，奖懒罚勤。英whip the fast and hard working-unfair punishment;