That can lead to a lot of wasted effort.

能会导致大量的努力白费。

I believe in the wasted years of work.

我相信白费掉的多年苦工。

No, I do. II didn't write " superfluid helium" on this napkin for nothing.

我真的想听。我特意把超流氦写在餐巾纸上不是白费的。

B. His efforts made in vain.

B. 他的努力白费了。

Still Matthew said nothing and Marilla had a sense of having wasted words and breath.

马修仍然一言不发，玛丽拉有种白费口舌的感觉。

I have been amazed by your strength and your courage, and I pledge I will not let your efforts be in vain.

我对的努力和敢表赞叹，我在里承诺，我不会让的努力白费。

Learning, as I'm sure you realise is a two way process and without a significant investment from you, all our efforts will come to nothing.

学习方面，我确定们明白学习是双向过程，如没有们的大力投入，我们所有的努力都是白费的。

The Englishman objected strenuously; but as neither the blacks nor the Arab could understand a word he said his pleas were wasted.

英国人极力反对。 但由于黑人和阿拉伯人一个字也听不懂， 他说他的请求白费了。

Measure the size of a ring that fits well on the person you are buying a gift for so you won't have to ruin the surprise.

如戒指是用来送礼，测量对方戴着刚合适的戒指的尺寸。样就不会让的惊喜白费心思。

" A young man for whom two such elders had devoted themselves would indeed be culpable if he threw himself away and made their sacrifices vain" .

“一个年轻人为两位样的长辈献身， 如他放弃自己并让他们的牺牲白费， 那确实是有罪的” 。

When he met the first of his men, he commanded them to tell the rest that there was nothing left to do but to return to the forest; that all their work had been for nothing.

当他遇到他的第一个部下时，他命令他们告诉其他人返回森林，没有其他事做了；他们所有的工作都是白费的。

In the evening we had a dance. Cathy begged that he might b liberated then, as Isabella Linton had no partner; her entreaties were vain, and I was appointed to supply the deficiency.

晚上我们有个跳舞会。凯蒂请求时把他放出来，因为伊莎贝拉·林惇没有舞伴。她的请求是白费的，我奉命来补个缺。

All that time researching the subject and writing was wasted. After my story was rejected, I just didn’t have the heart to stay in the office. I walked the city streets with a heavy heart. I felt tired and sad.

查资料和写东西的时间都白费了。我的故事被拒之后，我就没心情待在办公室了。我怀着沉重的心情走在城市的大街小巷。我心好累，我好难过。