艰难的

Unless you have already decided on a design, it can be very difficult to select one on the spot.

除非你已经决定了设计，它可以是很艰难的选择之一是在现场。

He was always ready to take on the hardest job.

他总是乐于做最艰难的工作。

But even after the restructuring is implemented, Opel will still have a long, hard road to negotiate.

但是即使重组完成，欧宝还有一条漫长而艰难的道路要走。

Have a tough game in Orlando tonight. I have to get my rest!

今天在奥兰多我们会有一个艰难的夜晚，我要休息了！

Meetings can make it difficult for everyone to participate and can lead people to oversimplify problems.

会议只能给与会人员带来艰难的局面，并且会导致人们把问题看得过于简单化。

Oxfam Trailwalker is a tough hike because you have to finish walking a 100-kilometre trail within 48 hours.

乐施会毅行者是一个艰难的游行，因为你不得不在48小时之内走完100公里。

I like here very much, just simple life , the envirment is better than anywhere in China and peopler are very plite.

我在这边学会计，中国同学很多，虽然语言环境的确差点儿，可是易于交流让我相对轻松地度过了最艰难的时期。

Since the process is quite tough, you need to be diligent, patient and persevering.

由于过程是非常艰难的，你必须勤奋，忍耐和坚持不懈。

In thailand, of course, all these would be pounded by hand with a pestle and mortar, but food processors do cut out all the hard work.

当然在泰国，所有这些都要用杵和研钵捣碎，但食品加工机做了所有艰难的工作。

I think it's going to be a rough road in February and March for Phoenix.

我认为太阳在2月和3月有一段相当艰难的路要走。

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。