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

真想听。特意把超流氦写餐巾纸上可不是白费。

I believe in the wasted years of work.

相信白费掉多年苦工。

That can lead to a lot of wasted effort.

这可能会导致大量白费。

There were many a student who just couldn't accept the fact that all their effort was in vain.

有很多学生无法接受自己所有都白费了事实。

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感觉。

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，确定你们明白学习是双向过程，如果没有你们大投入，们所有都是白费。

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

对你和果敢表示赞，这里承诺，不会让你白费。

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

英国人极反对。 但由于黑人和阿拉伯人一个字也听不懂， 他说他请求白费了。

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.

如果你买戒指是用来送礼，测量对方戴着刚合适戒指尺寸。这样就不会让你惊喜白费心思。

" 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" .

“一个年轻人为两位这样长辈献身， 如果他放弃自己并让他们牺牲白费， 那确实是有罪” 。

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.

晚上们有个跳舞会。凯蒂请求这时把他放出来，因为伊莎贝拉·林惇没有舞伴。她请求是白费，奉命来补这个缺。

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，没有其他事可做了；他们所有工作都是白费。

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.

查资料和写东西时间都白费了。故事被拒之后，就没心情待办公室了。怀着沉重心情走城市大街小巷。心好累，好难过。