白费的

I am afraid all my efforts were in vain.

我担心我的努力都白费了。

All my efforts turned out to be in vain.

我所有的努力都白费了。

All our hard work was in vain...

我们的所有努力都白费了。

I'm sorry to say that all our efforts were in vain.

很抱歉，我们的努力全都白费了。

My labor really has wasted, to again did not want to send English indignantly!

我的辛苦真是白费了，气愤到再也不想发英语了！

In spite of our defeat, all the work Hillary, Ira Magaziner, and the rest of our people had done would not be in vain.

尽管这次失利了，希拉里、伊拉。马加齐纳和其他工作人员所做的工作并没有白费。

You are milking the bull. He will never join the team.

你不用白费功夫了*，他是永远不会加入我们队伍的。

I am a speculator in rarities, and I have dealings with persons interested in numismatics all over the world

我知道要叫你信服你干不了又奸又滑的房地产投机商是白费口舌。

What they have done is of no avail.

他们刚刚作的都是白费力气！

My sister is very pigheaded, if you want to change her mind is ultimately like beat the air.

我妹妹很固执的，你要她改变心意根本就是白费力气。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。