在线词典临渴掘井到口渴才掘井。比喻事先没有准备,临时才想办法。拼音lín kě jué jǐng解释到口渴才掘井。比喻事先没有准备,临时才想办法。近义词措手不及、临阵磨枪反义词有备无患、常备不懈英文释义lit. not to dig a well until one is thirsty; to be unprepared and seek help at the last minute (idiom)