[弹指之间 / 彈指之間, tán zhǐ zhī jiānㄊㄢˊ ㄓˇ ㄓ ㄐㄧㄢ] a snap of the fingers (成语 saw); in an instant; in a short moment; in a flash; in the twinkling of an eye#52437
[对牛弹琴 / 對牛彈琴, duì niú tán qínㄉㄨㄟˋ ㄋㄧㄡˊ ㄊㄢˊ ㄑㄧㄣˊ] to play the lute to a cow (成语 saw); fig. offering a treat to a unappreciative audience; to cast pearls before swine; caviar to the general; to preach to deaf ears; to talk over sb's head#66338