英语习语：

save your breath 省口气吧；别白费口舌了


—— Hey? John! John!（嘿，John! John!）
—— Save your breath. He's out of earshot.（省口气吧。他已经听不到了。）


双语例句：
Save your breath while you still have some.
趁你还有点精力，省着点吧。

Save your breath; you'll never change her mind.
别费口舌了，你永远改变不了她的主意的。

Save your breath; the boss will never give you the day off.
你别费口舌了，老板决不会给你休息日的。

You might as well save your breath. He just doesn't listen to reason.
你还是省省吧，他压根就不听劝。