save your breath
US /seɪv jʊər brɛθ/
UK /seɪv jʊər brɛθ/
1.
省省口舌, 別費口舌了
to not bother saying something because it will not change anything
:
•
You can try to convince him, but you'd better save your breath; he never listens.
你可以試著說服他，但最好還是省省口舌吧；他從不聽。
•
Don't bother arguing with her, just save your breath.
別費勁和她爭論了，還是省省口舌吧。