明珠暗投: cast pearls before swine -- a talented man finds his ability unrecognized; a bright pearl thrown into darkness -- a valuable thing gained by a person who doesn't know it at all; a bright p
对牛弹琴: play the lute to a cow -- to have [choose] the wrong audience; cast [throw] pearls before swine; play one's guitar to an ox; preach to deaf ears; talk of ice to a butterfly; talk over peop
