"waste your breath" in Chinese (Simplified)

白费口舌白说

Definition

说话或者争论却什么都达不到，通常因为对方不会听或者改变想法。

属于非正式表达，通常用于劝别人不用再说了，比如“别白费口舌”。不是字面上的意思。

Don't waste your breath; he won't listen to you.

别**白费口舌**了，他不会听你的。

You’ll just waste your breath arguing with her about that.

和她争论这事你只是**白说**。

I told him to be careful, but I think I wasted my breath.

我告诉他要小心，但我觉得我**白费口舌**了。

You can try to explain it, but you're just wasting your breath at this point.

你可以试着解释，但现在你只是**白费口舌**。

Seriously, don’t waste your breath—she never changes her mind.

说真的，别**白费口舌**了——她从不改变主意。

I'm not going to waste my breath trying to convince him.

我不会**白费口舌**去说服他。