白费

The good news is that you need not spend energy for results that don't matter to you.

好消息是，你不需要在对你不重要的结果上白费力气了。

I do not foretell for all foretelling is now vain; on the one hand lies darkness and on the other only hope.

我不做预言，由于方今任何预言都是白费的，也是黑暗，一边只能是希望。

His failure made a mockery of his fri d's great efforts to help him.

他的失败使他的朋友帮助他的一番心血白费了。

But I'd also accepted all his outrageous gifts and was registered, however futilely, to attend Dartmouth College in the fall.

但我也接受了他夸张的礼物，又在达特茅斯学院注册，虽然是白费气力，并将在秋天入学的条件。

Wait or pass the time aimlessly or futilely; be kept waiting .

漫无目的地或者白费地等待或者消磨时间；一直等待。

"We have such a challenge ahead of us on climate change," says Kevin Tuerff, a co-founder of the marketing consultancy EnviroMedia."Greenwashing harms the effort we need to be making."

"全球变暖是面临所有人的艰难挑战，"EnviroMedia营销咨询的合作者之一，Kevin Tuerff说，"绿色清新使得我们的努力白费。"

My little sister is so hard-headed that you efforts to change her mind will definitely go in vain.

我妹妹很固执，你要她改变心意根本就是白费力气。

My sister is so hard-headed that turning her mind back is wasting your time.

我妹妹很固执，你要她改变心意根本就是白费力气。

My litter sister is so hard-headed that you effort to change her mind will defently go in vain.

我妹妹很固执，你要她改变心意根本就是白费力气

The CO2 can make the Earth warmer than before. Then the icecap will melt by the temperature.

哇！好险！刚才浏览器崩溃了……还好Firefox将这篇文章连着页面也给恢复过来了，么有白费功夫呵。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。