difficult problem
美 
英
例句
the electromagnetic inverse scattering is one of most difficult problem due partly to its ill - posed , nonlinear and instability nature.
由于逆散射问题的求解存在病态性、非唯一性以及不稳定性，这给它的求解带来很大困难。
The question of water leakage from the cold fresh pork is always the difficult problem of the puzzle slaughter in the enterprise.
冷鲜白条肉出水问题一直是困扰屠宰企业的难题，也是影响白条肉质量的重要因素。
There's a tendency for people with that sort of background to just want a really difficult problem to solve.
拥有那种背景的人有一个倾向，即仅仅想要解决一个确实很难的问题。
On the surface, this seems like a difficult problem, but in fact there's an easy solution to it.
表面看来这是个难题，实际上很容易解决。
A difficult problem could be good for a designer, but a fickle client or unreliable materials would not be.
一个困难的问题对一个设计者来说是好的，但是一个多变的客户和不可靠的材料不是。
Dropout issue of elementary school students has always been a difficult problem for education leadership at all levels.
小学生辍学问题一直是各级教育领导的一个难题。
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。
The question of fund is a difficult problem which is not easy to solve in our rural economic development throughout.
在我国农村的经济发展中，资金问题始终是一个不易解决的难题。
The evaluation of radar antijamming performances has always been a difficult problem.
雷达抗干扰性能评估一直是一个技术难题。
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。
It's such a difficult problem that I have to dom uch to work it out.
这是一道如此难解的题，以致我得费很大力气才能把它做出来。
They're actually trying to solve an incredibly difficult problem in artificial intelligence.
事实上，他们是想解决困惑人工智能多年的一个老大难问题。
During Chinese information processing, judging which word strings should be in participle list is always a difficult problem.
中文信息处理中，判断哪些词串该入选《分词词表》一直是一个难题。
Due to inhomogeneity and fractures and pores of carbonate rocks, satisfied evaluation on carbonate reservoir is always a difficult problem.
碳酸盐岩由于其非均质性和缝洞的存在，对其储层的正确评价一直是一个比较困难的问题。
The difficult problem is satisfactorily solved. The machining precision and the surface quality reach the design requirements.
初步解决了该加工难题，加工精度、表面质量均符合设计要求。
The analysis of the paleotectonic stress field in the overburden of a basin is always a difficult problem in basin dynamic research.
盆地覆盖区古构造应力场分析一直是盆地动力学研究的一个难题。
To conclude, tennis elbow can be a difficult problem but it may be alleviated by thoughtful medical and technical measures.
结论是，网球肘是困难的问题，但是却可以用深思熟虑的内科和技巧方法来减轻。
The development of flexure hinges with large deflection, low stress, small parasitic center shift has always been a difficult problem.
大变形、小应力、小中心漂移的柔性铰链的研制一直是柔性铰链研究的难题。
Being short of funds has been a difficult problem for the police law enforcement work.
经费紧张一直是困扰公安执法工作的难点问题。
In geotechnical engineering, construction in miscellaneous soil-filling areas has been a key and difficult problem.
在岩土工程中，杂填土区的施工历来是施工项目中的重点和难点部分。
A more difficult problem is the quantitative description of the secondary breakup of the initial spray by high velocity combustion gas.
一个更困难的问题是关于高速燃气使初始喷雾二次破裂的定量描述。
A difficult problem or two occupied his mind.
有一两个困难问题在他心里回旋。
Living too far away, the staff are often late for work. It has been a big and difficult problem for a long time.
职工们住得太远了，免不了迟到，这是一个老大难问题。
When a database encryption system is designed, the design of key-managing module is a very difficult problem and must be solved firstly.
密钥管理方案的设计是数据库加密系统设计时必须首先解决的一个难题。
As long as you beep trying, you will be able to resolve this difficult problem sooner or later.
只要你不懈努力，你迟早会解决这个难题的。
This article believes that the deep development of the pawn broking is one of efficient paths to this financial difficult problem.
深化典当业的发展是解决这一金融难题的有效途径之一。
Neonatal capillary hemangioma can cure me, is no longer difficult problem, choose the professional hospital can easily cured.
新生儿毛细血管瘤能医治吗，已经不再是难题，选择专业的医院便可以轻松治愈。
Separation of copper, zinc and sulphur complex ore has been a difficult problem in the mineral processing field.
铜锌硫多金属矿石分离一直是选矿界的难题。
this is such a difficult problem that few students can work it out .
这道题目太难了，很少有学生会做。
How to determine the isomorphism of graphs is a difficult problem of graph theory, which has not been completely solved so far.
图同构的判定性问题是图论理论中的一个难题，至今没有得到彻底解决。
Calculating the energy of a vacuum state is a difficult problem and usually depends on finding suitable approximations .
计算真空态能量是个困难的问题，而且往往取决于是否能够找到贴切与合适的逼近方式。
Translating long English sentences into Chinese has always been an important yet difficult problem in translation teaching.
英语长句的翻译历来是英汉翻译教学中的重点和难点。
We're trying to solve the difficult problem by ourselves.
我们正设法自己解决这个难题。
So, do not enter the error that makes a problem, want difficulty to practice appropriately, do not discount difficult problem to death.
所以，不要进入做题的误区，要难度适当地练习，不要死扣难题。
Thirdly, the simulation of concrete crack has been a difficult problem for normal FEM ever since.
钢筋混凝土结构的裂缝模拟处理一直是常规有限元难以有效解决的问题。
Today, the humanitarianism thought still was the theoretically difficult problem, needs our unceasingly ponder and the exploration.
在今天，人道主义思想仍然是理论上的难题，需要我们不断地思考与探索。
Reliability evaluation of small-sample-warship complex system is always a difficult problem.
小子样舰船大型复杂系统的可靠性评估方法一直是个难题。
The conversion of mass crime is a difficult problem in judicatory practice, as it does not bring to bear accurate theory to guide.
聚众犯罪的转化犯在司法实践中是一个较为疑难的问题，主要原因是没有运用正确的理论加以指导。
How to efficiently eliminate multiples in seismic data processing is a difficult problem which has not been well solved so far.
如何有效地消除多次波等相关噪音是地震资料处理中一个由来已久，但一直没有得到很好解决的问题。
It was a difficult problem in railway container transportation management to select and manage the railway container wagon flow.
对集装箱运输径路的选择和管理，是集装箱运输管理的一项技术问题之一。
This is such a difficult problem as nobody can work it out.
这道题太难了，没有人能解出来。
It designed the flow of the smart-listen system, then solved the difficult problem in development of the system.
设计了系统智能监控流程，从而解决了系统开发运行的难题。
