I won't waste good advice on John any more because he never listens to it. I won't cast pearls before swine.
我不再白费口舌劝约翰了，因为他从不听劝。我决不再对牛弹琴了。But it is mere idleness to say that I had not lived before - that the soul has no previous existence.
但若说我在此之前不曾生活过——我的灵魂在此之前不曾存在过，那是白费口舌。The old man is so stubborn that you'd be only wasting your breath trying to make him change his mind.
那个老头子太固执，你去劝他改变主意，不过是白费口舌。Thus they passed the minutes, each well knowing that this was only waste of breath, the one essential being simply to wait.
他们就这样说了几分钟的话，每个人心里都知道，他们那番话是白费口舌，根本的办法只有耐心等待。Don't waste your breath try to convince him; he's going to leave anyway.
不要白费口舌劝阻他了，他反正也要走的。And do you know, I fancy, Bonaparte really has lost his head.
您是否知道，我亲爱的，我似乎觉得，波拿巴简直白费口舌。Don't waste your breath trying to persuade them, they'll never listen.
别白费口舌规劝他们，他们不会听你的话的。Don't waste your breath trying to persuade him.
别白费口舌去劝他了Bob found himself preaching to the choir when he was telling Jane the advantages of living in the suburbs. She already hates city life.
鲍勃向简鼓吹在郊区住的好处简直是白费口舌，因为她早就恨透了城市生活。