It is a problem difficult to solve.
这是一个难解决的问题。
I meet a problem difficult to solve.
我遇到一个难以解决的问题。
It is a problem difficult to work out.
这是一个难以解决的问题。
It is a problem difficult to work out.
这是一道难以解决的问题。
Power network planning is a NP hard problem difficult to be solved.
电网规划是一个较难解决的NP难问题。
In itself, it's not a difficult problem to solve.
这本身并不是个难解决的问题。
Objective assessment of the severity of the problem was difficult.
难以客观判定该问题的严重性。
It was difficult to explain the problem to beginners.
对初学者解释这个问题很难。
It's difficult to define the exact nature of the problem.
很难给这个问题确切定性。
Why is the obesity problem in Britain so difficult to solve?
为什么英国的肥胖问题如此难以解决？
If more than a few weeks go by, we might have a real problem that would very difficult to fix in time for you to graduate.
如果好几个星期过去了，我们可能会面临一个真正的问题，这个问题我们很难在你毕业的时候解决。
How to improve the quality of products was a difficult problem to him.
如何提高产品质量对他来说可是个难题。
This mathematics problem is extremely difficult.
这道数学题难度很大。
The problem will not be difficult to solve, if properly handled.
如处理得当，问题不难解决。
She is working at a difficult problem in mathematics.
她在做一道数学难题。
Never have I come across such a difficult problem.
我还从没有遇到过这样困难的问题。
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。
But the problem is a difficult one to solve.
但这是一个难以解决的问题。
Also, the size of these lists makes it more difficult to analyze the problem.
另外，这些链表的规模也会增加分析问题的难度。
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。
One problem was that it is extremely difficult to recreate the effect in the laboratory.
有个问题就是想在实验室内再现地磁效果异常困难。
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)。
Auctions use the market mechanism to solve a difficult business problem: pricing.
拍卖利用市场机制，解决了一个商业难题：定价。
Companies will have no choice but to face the difficult problem of managing older workers.
公司除了正视管理老年劳力的困难问题外将别无选择。如何鼓励高龄员工去适应新做法，新技术？
Finding the solution to a difficult life problem.
解决生活中的难题。
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。
He soon turned his attention to the difficult problem.
他很快把注意力转到这个难题上。
But for a driver, if you have an accident and you have this problem, the recovery is more difficult.
但对于一个车手，如果你经历过一次事故，并且有这些问题，恢复起来就要困难些。
But for a driver, if you have an accident and you have this problem, the recovery is more difficult.
但对于一个车手，如果你经历过一次事故，并且有这些问题，恢复起来就要困难些。
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