to cast pearls before swine
[cast|throw] {one's} pearls before swine
to cast pearls before swine
01
돼지 목에 진주, 고마움 모르는 사람에게 애쓰기
to do good things and waste valuable resources for ungrateful people
idiom
예시들
The teacher put a lot of effort into preparing an engaging lesson, but her students were more interested in chatting and playing on their phones. She felt like she was casting pearls before swine.



























