Definition
This idiom describes a situation where someone is not listening or responding to what is being said.
對牛彈琴
I tried to explain the problem to him, but it was like talking to a brick wall.
我試著向他解釋這個問題，但就像對牛彈琴一樣。
Discussing this issue with her is like talking to a brick wall; she simply doesn't listen.
與她討論這個問題就像對牛彈琴；她根本不聽。
I told my boss my ideas, but he completely ignored me; it felt like talking to a brick wall.
我告訴老闆我的想法，但他完全忽略了我；感覺就像對牛彈琴。