Definition
This idiom describes a situation where someone is not listening or responding to what is being said.
对牛弹琴
I tried to explain the problem to him, but it was like talking to a brick wall.
我试着向他解释这个问题，但就像对牛弹琴一样。
Discussing this issue with her is like talking to a brick wall; she simply doesn't listen.
与她讨论这个问题就像对牛弹琴；她根本不听。
I told my boss my ideas, but he completely ignored me; it felt like talking to a brick wall.
我告诉老板我的想法，但他完全忽略了我；感觉就像对牛弹琴。