to cast pearls before swine
[cast|throw] {one's} pearls before swine
to cast pearls before swine
01
猫に小判, ありがたみのない相手に尽くす
to do good things and waste valuable resources for ungrateful people
idiom
例
Buying expensive gifts for them is casting pearls before swine.
彼らに高いプレゼントを買うなんて猫に小判だ。



























