The equations, although difficult, are well-defined.
该方程，虽然困难，但却是明确界定。
Emotion, although difficult to control, but it is a powerful force.
感情虽然难以控制，但却是一种强大的动力。
Although difficult to pronounce presbyopia pee - uh is not a disease.
虽然难读，老花不是一种疾病。
Although some sightings of UFOs are difficult to explain, most can be explained quite easily.
虽然有些目击 UFO的现象很难解释，但大多数都可以很容易地解释。
Although, without access to the code base, this is a much more difficult process.
虽然不用访问代码库，这仍然是一个非常困难的过程。
The answer is definitely "yes", although it is a difficult task.
回答当然是肯定的，尽管它是一项困难的工作。
Although there are people with authority online, it's difficult to tell who they are.
尽管网络上有权威人物，但是要知道他们是谁是困难的。
Although change is often difficult, it can be good, too.
虽然改变常常很难，但也可以变得美好。
Although it's possible to travel for free in a big city, it's damn difficult.
虽然在一个大城市里旅行是可能的，但这非常困难。
These are not difficult things to understand, although they may be difficult to practice.
尽管实践这些会有一点困难，但都不是很难理解。
Although cutting can be a difficult pattern to break, it is possible.
虽然很难打破切割这个模式(译者注：处理烦恼或者困难的模式)，但是这是可能的。
Although it's difficult to write complicated tasks with Perl, it can be done.
虽然用Perl编写复杂的任务是困难的，但却可以做到。
But unfortunately, although it is true, it is difficult for us to accept it.
但不幸的是，尽管这千真万确，我们仍然难以接受。
Although aside from software screenshots or photographs it’s difficult to find much else.
除了软件截图或自传图片以外，似乎找不到其他图片来源。
The page size was small, and it was more difficult (although certainly not impossible) to fill up the screen nicely.
页面越小，越难以（但并不是不可能）完好地填充屏幕。
Although it is inevitably slower and more difficult than any of us would wish.
虽然与我们任何人的希望相比还是不可避免地更慢和更困难。
She and her husband stood firm as construction work began around them, although they had to move out when access to their property became difficult.
当建设工程在他们周围开始时，她和她的丈夫坚守不动，虽然当从他们的房子出入变得困难时他们不得不搬出去。
Although they have weaknesses, their incredible vitality makes them very difficult to defeat.
虽然他们有弱点，但凭借着难以置信的顽强生命力，使其很难被击败。
Although hit was difficult, the class passed the test with excellent marks.
虽然难度很高，这个班级还是以高分通过了测试。
Although this is difficult, it is possible.
这是困难的，但是可能的。
Although it was difficult, the class passed the test with excellent marks.
虽然难度很高，这个班级还是以高分通过了测试。
Although most of them work hard day and night, they still find it difficult to support their life.
尽管他们大多数人都日夜工作，也会发现生活仍旧很困难。
He finished his homework although it was difficult.
虽然作业难做，他还是完成了。
I want to become a director, although I know this is very difficult.
我想成为一个导演，虽然我知道这很困难。
Although insurance can be complex, its basic concepts are neither difficult nor impossible to learn.
尽管保险可能是复杂的，但是保险的一些基本概念既不是很难懂的，也不是不可能学会的。
Although the exam was difficult, she managed to pass it.
尽管考试很难，她还是设法通过了。
Although I find English difficult to learn, I still keep up interest in English.
虽然我觉得英语难学，我仍然保持了英语的兴趣。
Although I find English difficult to learn, I still keep up interest in English.
虽然我觉得英语难学，我仍然保持了英语的兴趣。
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