Explanation: See "casting pearls before swine." Source: "Equality of Zhuangzi" Bifei the Ming and Ming, so ignorant of the Kennedy White of the end of "Guo Xiang Jin is still on bovine note ear drum spring, he went so far unknown, it has finally ignorant of the natural operation of the road also."
No. 2
Analogy of the sensible people do not understand something unreasonable or statement. Ironically, often with no avail, or the meaning of each other silly. With the "howling at the moon."
No one save a hundred, hit out at random, play the harp( (lute) to a cow; cast pearls before a swine, waste one's words, make a very wild boast about sth. as if it were raining flowers, Tiannvsanhua, 3 Paper no ass
Antonym
teach students according to their aptitude, suit the medicine to the illness, Symptomatic Dispensing, shoot the arrow at the target, take measures in time