In itself, it's not a difficult problem to solve.
这本身并不是个难解决的问题。
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。
She is working at a difficult problem in mathematics.
她在做一道数学难题。
But I have a difficult problem.
但是我有一个棘手的问题。
What a difficult problem it is!
多难的一道题啊！
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。
Sea Ice loading - a difficult problem!
海冰载荷-一个难题！
Crime is a difficult problem in many cities.
犯罪在许多城市都是令人头痛的问题。
Never have I come across such a difficult problem.
我还从没有遇到过这样困难的问题。
Representation of tree is a difficult problem in 3dgis.
在3dgis中，树的表达是一个难点问题。
It is such a difficult problem as none of us can work out.
这是这么难的问题，我们没人做得出。
Our physics teacher got involved with a difficult problem.
我们的物理老师和一个难题纠缠在一起。
How to grow rice in such a dry area is a difficult problem.
在这样干旱的地区种水稻可是一个难题。
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)。
This is such a difficult problem as all of us can't work out.
这是一个我们所有人都不能解决的难题。
It is such a difficult problem that none of us can work it out.
这个问题太难了以致于没有人能够做出来。
A difficult problem in this area is how to guard against fraud.
在这区域的一个困难的问题是该如何防止欺骗。
Soft rock engineering is a difficult problem of rock mechanics.
软岩工程是岩体力学研究领域的难点问题之一。
It is a difficult problem to study the result-aggravated crime.
结果加重犯历来是刑法学研究的一个难点问题。
He is so clever that he could work out such a difficult problem.
他很聪明，把那么难的问题都解出来了。
We must arrive before ten o 'clock, this is a difficult problem.
我们必须十点钟以前到达，这是个难题。
Classification of HEIs is a difficult problem throughout the world.
高等学校分类是一个世界性的难题。
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。
The test of shock wave is a difficult problem in dynamic measurement.
冲击波的测试是动态测试中难度较大的测试问题。
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。
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。
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