It is easy to learn paper-cutting but very difficult to make it perfect.
剪纸学起来很容易，但要做到完美却很难。
This is my dream, a simple dream, but very difficult to do.
这就是我的梦想，简简单单，虽然做起来很难。
I tried the oil free version and it was good, but very difficult to blend.
我也用过无油配方，觉得也特好用就是太难推开了。
Accounting Conservatism principle is a principle that is well known but very difficult to explain.
谨慎性原则是一个众所周知却又很难以完全说清楚的会计原则。
The real can never equal the imagined, for it is easy to form ideals but very difficult to realize them.
事实永远无法满足想象，因为理想容易树立，实现则很难。
It's based on the idea of mathematical "trap-door" functions, which are easy to compute in one direction but very difficult to compute in the reverse direction.
它所基于的理念是数学上的“trap - door”函数，它可以沿着一个方向轻松地进行计算，但是很难从相反的方向进行计算。
Using Z language it is convenient to describe the data transform of operations of system, but very difficult to describe the temporal relations of operations of system.
语言可以方便地描述系统操作的数据转换，却很难描述系统操作间的时序关系。
All teams are beatable, but it's going to be very, very difficult.
所有的团队都能够被打败，但却非常非常的困难。
You can train it to flap its wings to escape a situation but it's very difficult to get it to flap its wings for food.
你可以训练它扇动翅膀以逃避某种情况，但要让它扇动翅膀获取食物是非常困难的。
We thought it was easy, but it turned out that the exam was very difficult.
我们以为这个考试很简单，但其实很难。
The Purdue scaffold looks like a very interesting approach—it's certainly an advance—but until it's been tested in vivo, it's difficult to comment further.
普渡的支架看起来是个非常有趣的方法——这肯定是一个进步——但是，在进行体内测试之前，很难进一步评判。
Not only will those skills be actually integrated into the curriculum but they will be very important to have in the future because they are difficult to automate.
因为这些技能很难自动化，它们不仅会被整合到课程中，在未来也将变得非常重要。
That sounds rather simple, but in fact it's very difficult.
那听起来很简单，但实际上非常难。
Paper cutting sounds very easy but it can be difficult.
剪纸听起来很简单，但其实很难。
Sometimes the instructions are very simple but the furniture itself is difficult to build.
有时候说明书很简单，但是家具本身很难做。
It's very easy to fall into the habit of smoking, but extremely difficult to get rid of it.
要养成吸烟习惯很容易，但要戒掉却极其困难。
But he had only three fingers on each hand, so it was very difficult for him.
但是他每只手只有三个手指，所以这对他来说非常困难。
Depending on your personality, whether you're introverted or extroverted, I realize that this approach could be very difficult; but it is very effective.
根据你的性格，不管你是外向还是内向的，我发现这样开头可能是十分艰难的，但实际上是很有效的。
Recovery is very difficult, but it really is worth it.
恢复是十分艰难的，但是它真的值得（这些磨难）。
It was VERY difficult initially but it really helps to curb spending.
最初这是非常困难，但它确实有助于遏制消费。
I tried the best I could to translate his Russian to Spanish, but it was very difficult for me who only speaks a little Russian.
我尽最大努力把维克托的俄语翻译成西班牙语，但是困难的是，他只能说一点俄语。
It was horrible and very difficult. But I did it for my grandchildren.
旅程艰难得可怕，但这是为了我的孩子。
Secretary Clinton says Afghanistan is a very difficult environment, but success is not impossible.
克林顿国务卿说，阿富汗的环境非常不同，但是成功不是没有可能的。
As he told MTV last month, "I do have a goal in this lifetime to be the greatest artist of all time, [but] that's very difficult being that I can't dance or sing."
他上个月告诉MTV，“我在此生确实有一个目标 ——成为有史以来最伟大的艺术家，（但）这是非常困难的因为我不会跳舞或唱歌”。
“I am with his mother now and she is very upset, ” Zhang said. “There are many friends and relatives here, but this is very difficult for them.
“我现在正和他的母亲在一起，她很悲痛”，张说，“有很多亲人朋友和我们在一起，但是这件事对于他们而言也很难过。”
It is still not known why the control mechanism breaks down in some people, but the results are very difficult to treat.
但我们还是不知道，在某些人群中这样的控制机理失效的原因，只知道这样的疾病极难治疗。
I debated whether to include session recommendations here for those who want to attend, but it's very difficult to do so because THE expert from IBM is presenting on each topic.
我认为在本文中无法为那些想参加的人提供会议推荐内容，实际上很难做到这一点，因为每个主题都会有来自IBM的专家出席。
I debated whether to include session recommendations here for those who want to attend, but it's very difficult to do so because THE expert from IBM is presenting on each topic.
我认为在本文中无法为那些想参加的人提供会议推荐内容，实际上很难做到这一点，因为每个主题都会有来自IBM的专家出席。
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