In itself, it's not a difficult problem to solve.
这本身并不是个难解决的问题。
She is working at a difficult problem in mathematics.
她在做一道数学难题。
It's really a difficult problem.
这真是个难题。
He's working on a difficult problem.
他正在研究一个困难问题。
We have a difficult problem to solve.
我们面临一个难以解决的问题。
Let me think over this difficult problem.
让我仔细思考这道难题。
The difficult problem had not been solved.
这个难题还没有得到解答。
He was wrestling with the difficult problem.
他在苦思解决那个难题的方法。
At first there was a seemingly difficult problem.
在开始的时候存在一个难题。
Never have I come across such a difficult problem.
我还从没有遇到过这样困难的问题。
How did you deal with that difficult problem?
你是怎样解决那个难题的？
He helped me deal with this difficult problem.
他帮助我处理了这一难题。
He soon turned his attention to the difficult problem.
他很快把注意力转到这个难题上。
Jim solved the difficult problem with their help.
在他们的帮助下，吉姆解决了这道难题。
He succeeded in working out this difficult problem.
他成功地做出了这道难题。
The greatest scholar cannot solve this difficult problem.
再伟大的学者也没有办法解答这个难题吧。
Representation of tree is a difficult problem in 3dgis.
在3dgis中，树的表达是一个难点问题。
Fortunately, it's not a difficult problem (see Listing 6) to fix.
所幸的是，这个问题不难解决(见清单6)。
If a problem can be solved by money, it is not really a difficult problem.
如果一个问题可以用金钱得到解决，那么它就不真是一个困难的问题。
The most difficult problem faced by the Google Books team is garbage data.
Google图书面临的最困难的问题是垃圾数据。
A woman like me, always in a difficult problem in the form of feelings.
像我这样的女人，总是以一个难题的形式出现在感情里。
It remains a difficult problem to develop a concrete value chain analysis.
如何具体展开价值链分析，仍是一个难题。
It remains with Mr Smith to solve the difficult problem now confronting us.
我们现在面临的难题有待史密斯先生来解决。
Such a difficult problem you can answer very complete, is really something!
这么难的题你能回答得很完整，真是了不起！
I know this is a difficult problem, but do you prepare to face the challenge?
我知道这是个难题，但是你准备好迎接这个挑战了吗？
You can always trust him to come up with a solution to any difficult problem.
你可以一直相信他能想出任何难题的解决方法。
The most difficult problem for the overseas students to overcome might be loneliness.
对留学海外的学子来说最困难的问题可能是怎样克服寂寞和孤独。
I had puzzled over this difficult problem until yesterday I found a solution to it.
我—-一直被这一难题所困扰，直到昨天才找到了解决的办法。
Vibration of motorcycle is a difficult problem motorcycle producers are faced with.
摩托车振动是当前摩托车企业面临的技术难题。
Vibration of motorcycle is a difficult problem motorcycle producers are faced with.
摩托车振动是当前摩托车企业面临的技术难题。
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