The learning curve: learning Chinese is difficult, and after we’ve completed the arduous process, we come to feel like we’ve earned it, and this place is ours.
学习的挫折：学习中文是很困难的一件事，而在我们完成了这个艰难的过程后，我们觉得这是我们应得的，这个地方是我们的。
Yet this will be difficult because as much as they might agree on matters of substance, the diffuse nature of the opposition makes agreement on tactics and procedures slow and arduous.
但这将是困难的，因为尽管他们会在主要问题上达成一致，各党派间本质上的种种差别会使他们对具体方法和程序的意见统一过程缓慢而又费力。
We lose self-discipline. After all, why would we work on something that is arduous and difficult when we could be watching TV?
总之，为什么我们要在可以看电视的时候去做一些艰辛困难的事情呢？
This is for all of us to learn in life to learn, the more arduous and difficult, we should be more strong, so that we will be the same as with grass, to grow.
这也是我们大家要学习的地方，在学习生活中，越是艰苦、困难，我们越要坚强，这样我们才会跟小草一样，茁壮成长。
It is as well that you cannot remember the arduous and difficult journey you have made over eons of time.
你也无法想起你已经经历了亿万年时间的艰巨和困难的旅程。
Real happiness, but his heart more than the feeling of pleasure, can be arduous, hardships can be a difficult everywhere, on the verge of death.
真正的快乐，不过是发自内心的愉悦的感觉而已，可以是艰苦卓绝、卧薪尝胆，也可以是荆棘遍地、奄奄一息。
It is arduous, it is difficult, but once you can do it, you will have become a different person, a different being in a different world.
它是费力的，它是困难的，但是你一旦做到，你会变成一个不同的人，一个不同的存有者，在一个不同的世界里。
We never thought that the journey could be so long, the job so difficult, the career path so arduous, the spiritual ministry so taxing.
我们从未想过这个路程是那么的长，要做的工作是那么的坚难，走起来是那么的费力，那属灵事奉的压力又是那么的大。
Multitarget interception is a big difficult problem in ballistic missile defense, and is also the most arduous technology of the missile defense system of US.
多目标拦截是弹道导弹防御的重大难题，也是目前美国导弹防御系统所遇到的最大的技术难点。
However, vacuum column operations present an arduous environment for efficient fractionation, which makes upgrading product from bottoms to distillate more difficult.
然而，有效馏分的提取会使减压操作处境变得困难，也使塔底物料中蒸馏出更多的产品变得更加困难。
But then my father no matter how difficult, arduous journey home after learning to care about me, dictation words, reciting lessons, daily essential!
然而爸爸无论再奈何辛苦、疲惫，回家后都还要关怀我的练习景况，听写单词，背诵课文，每天必不行少！
But then my father no matter how difficult, arduous journey home after learning to care about me, dictation words, reciting lessons, daily essential!
然而爸爸无论再奈何辛苦、疲惫，回家后都还要关怀我的练习景况，听写单词，背诵课文，每天必不行少！
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