查询词典 difficult problem

The biggest problem of the third industrial revolution is as easy to explain as it is difficult to solve.

第三次技术革命带来的最大的问题，说起来容易，可解决起来就难多了。

The problem was rendered extremely difficult by the extraordinary inertness of the nitrogen, which refuses to combine even with oxygen.

由于氮极大的惰性，不能与氧结合，所以这个问题被渲染得过分困难。

However, the problem of papal rule has been rendered more difficult by nineteenth century Roman declarations of papal infallibility.

然而，问题的教皇规则已经变得更加困难了十九世纪的古罗马教皇的声明犯错误。

Accord ingly to discuss about these problem is very very difficult.

因此在讨论这些问题是非常困难的。

The results show that the cultivated land area in Wanzhou will slightly decreased while the construction land will slightly increased,forest land will increased dramatically,and it is difficult to improve the ecosystem service value by single increasing the wetland area.Grassland ecological restoration and increasing orchard area will improve the ecosystem service value by comprehensive treatment of geological hazards and soil loss.The ecosystem service theory value in Wanzhou is 11.89 billion yuan each year,the correction value is 10.64 billion yuan each year,and the present value is 9.65 billion yuan each year.This shows the ecological restoration has good economical efficiency.The optimization of land use structures based on ecosystem service value could satisfy the development of social economy with land demand,and realized the benefit of ecology and economy inphase,the study supported a new way to solve the key technical problem in land use programming in China.

计算结果表明：（1）规划期内万州区耕地面积略有减少，建设用地面积有所增加，林地面积有较大幅度增加，大规模增加湿地面积提高土地生态功能价值则难以实现；（2）地质灾害与水土流失综合治理、草地生态系统修复以及适当增加园地面积，能够提高万州区土地生态功能价值；（3）万州区土地生态经济理论价值为11888亿元/a，修正价值为10644亿元/a，均高于现状值9653亿元/a，土地生态修复与建设的生态经济效益可观；（4）基于生态系统服务价值的土地利用结构优化，能够满足社会经济发展对土地的需求并同步实现生态经济效益的最优，为解决土地利用规划中的关键技术问题提供新的方法。

This method is difficult to get instant results, but it is to solve the problem.

这种方法难以立竿见影，但它是解决这一问题。

We will show that the traditional mixed integer programming approach makes the problem difficult to represent and solve.

我们将说明传统的混合整数规划方法使问题难以描述和解决。

The problem that the demand of accuracy, complexity and intelligibility are the very difficult issue however.

对判决精度、计算复杂性和概念的可理解性的要求仍然是人们面临的非常困难的问题。

So our algorithm is more efficient than [3]. Further, we propose the three most difficult interpolation problem. Our algorithm can solve the three problems easily.

另外，本论文还提出了三项具世界级困难度的内插问题，藉由本论文的内插演算法可以轻易解决。

The problem of invariance is both important and difficult in studies of neural retworks.

对不变性的认识，特别是对变换群下的不变性的认识，一直是神经网络系统研究中最重要的也是最困难的问题之一。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。