白费口舌

Riddle: After a good read to deaf donor Thesaurus:  No one save a hundred, hit out at random, play the harp( (lute) to a cow; cast pearls before a swine, Bovine drum spring, make a very wild boast about sth. as if it were raining flowers, Tiannvsanhua, 3 Paper no ass Antonym Group:  teach students according to their aptitude, suit the medicine to the illness, Symptomatic Dispensing, shoot the arrow at the target, take measures in time