白费的

But can surely prove that your care for your friends will never be unavailing.

你对朋友的关怀不是白费！

All my hard work was not in wain,I am very proud of it.

我所有的努力没有白费我感到很自豪。

I wish that it would go and let me cry in wain….

我们所有的努力都白费了，真令人生气。

I'm afraid you wasted your money.

很遗憾，你的钱白费了。

Find a man to marry Maggie in the next couple of years is a wild goose chase.

要帮Maggie在几年内找到个男士结婚是白费力气的。

You must take the exam─you can't throw away all that work!

你必须参加考试，不能把你所做的这一切都白费了。

Their unhelpfulness has stultified our efforts to improve things .

我们为改进工作的用心也就白费了。

Their unhelpfulness has stultified our efforts to improve things.

他们不管事，我们为改进工作的用心也就白费了。

I' m afrai d al l my efforts were i n vai n.

我担心我的努力全白费了。

I've spent a lot of time and energy, and I hate to see it all go to waste .

我在这上面花费了大量的时间和精力，我可不希望看到这一切努力都白费了。

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。