查询词典 difficult problem

Chinese is good at solving a difficult problem by conciliation .

中国人善于使用怀柔的方式来解决棘手的问题。

The difficult problem present by him entangle the conferee.

他所提出的问题使与会人士感到困惑。

Urban road traffic congestion is a difficult problem in the development of modern cities.

城市道路交通堵塞是现代城市发展中的一大难题。

It is extremely difficult to solve the problem of tunnel leak, because there are many muddiness, greasy dirts and slushes on the top of the tunnel, thereby it is hard to conglutinate the waterproof materials. Test results show that the impervious pressure and the splice strength of the acrylic acid waterproof material will be up to 1.2 MPa and 1.8 MPa in 30 min with new formula and unique construction craft 50 that reduce the difficulty of conglutination.

实验结果表明：使用新型丙烯酸防水材料配方和施工工艺，使丙烯酸防水材料的抗渗压和粘结强度在30 min里能够迅速分别达到1.2 MPa和1.8 MPa，从而降低粘结难度，很好地解决了既有隧道的顶部因有很多的淤泥、油污、水垢等杂物而使普通防水材料难以粘结的问题。

But, because of the complexity of the dye molecule, there has been short of detailed comprehension in its photocatalytic degradation process. The key problem is difficult to detect the intermediates clearly. In this paper, the photocatalytic degradation of azo dye Congo red in water solution was investigated on UV irradiating TiO2 in the homemade reactor. The optimization conditions were determined and then the rate of decolorization, COD decrease, yield of CO2 and varies pH of aqueous solution during illumination were detected; The varies of the possible intermediates during degradation process were monitored with UV-VIS spectrum and HPLC. The possible mechanism of Congo red photocatalytic degradation is discussed combined with the data of MS.

本文选择有代表性的常见偶氮染料—刚果红作为研究对象，以自制TiO2为催化剂和小功率紫外灯为光源，在自制光反应器上确定了光催化降解的优化条件，并在这个优化条件下测定了降解过程中的脱色率、COD去除率和CO2生成量；利用数显酸度计、紫外可见分光光度计和高效液相色谱仪跟踪测定了降解过程中的可能产物，并结合质谱的数据初步探讨了刚果红的可能降解机制。

The key to resolve the difficult problem lies in a breakthrough of current history concept,const...

解决这一难题的关键在于突破既有的史学观念，建构起新的整合理论，提出新的史学模型。

The treatment of slopes is a difficult problem in highway construction for a long time.

长期以来，边坡的治理一直是高速公路建设中的一个棘手的问题。

This complicates matters, for it is difficult to arrive at a common mind on the sacrifices that ought to be demanded of us in order to face the ecological problem in our consumerist society.

这样的态度，使事情变得非常复杂，因为，人们无法在「为了生态而牺牲」的态度上取得共识。然而，我们应该要求自己在这个消费主义的社会里，正视生态的问题。

The problem when you don't have an end to it is the containment becomes really difficult.

在无有效解决方式的情况下，问题则在於控制漏油变得非常困难。

This article incorporates robustness into a general convex conic optimization problem and shows its deterministic equivalence under the D-duality framework, in which one needs only to compute a D-induced convex cone, which is generally difficult.

本文把不确定性考虑进凸锥最优化问题，在D-对偶理论的框架内把原问题的确定性等价问题表示出来了。对于这样的问题，我们只要计算一个D-对偶锥就可以了。

Chimborazo and Cotopaxi, took me by the hand.

越过琴博腊索山和科托帕克西山。

This car is in a good condition.

这辆车的状况很好。