to save one's breath
01
别白费口舌, 说了也没用
to avoid wasting one's time and energy by not trying to persuade or convince someone who is unlikely to change their opinion or behavior
![to [save] {one's} breath definition and meaning](https://cdn.langeek.co/photo/40965/original/?type=jpeg "to [save] {one's} breath definition and meaning")
例子
I knew that, so I saved my breath, and offered no explanations.
别白费口舌了；他不会听的。
