那个谜对我们仍然是不可解的。
这样一个问题甚至可以难到最聪明的人，对年轻的亚瑟王来说，这就像一个不可解的问题。
Such a question would perplex even the most knowledgeable man, and, to young Arthur, it seemed an impossible query.
在那么多个世纪里，最早的美洲土著人一直在做什么呢？这个问题的答案在很大程度上是神秘而不可解的。
What were the earliest Americans doing for those many centuries? To a great extent, the answer is shrouded in mystery.
辫群是一种非交换的无限群，该群中有许多困难问题是不可解的，如字问题、共轭问题和根问题等，利用这些困难问题可以去设计一些密码协议。
The braid group is infinite non-commutative group, and it has many hard problems that can be utilized to design cryptographic primitives, such as the word problem, conjugacy problem and root problem.
辫群是一种非交换的无限群，该群中有许多困难问题是不可解的，如字问题、共轭问题和根问题等，利用这些困难问题可以去设计一些密码协议。
The braid groups have many hard problems that can be utilized to design cryptographic primitives, for example, the word problem, conjugacy problem, and root problem.
不过没有这类追本溯源的试验，我们永远不可能揭开人体发育的未解之谜：一小团细胞怎么变成完整的人体。
But without that sort of radical experimentation, we may never fully understand the great remaining mystery of human development: how a tiny clump of cells transforms into a fully formed human being.
最终你不可能得到这个方程的解。
You would not find a solution to the equation that you get at the end.
“完全解耦是极其困难和昂贵的，否则就是不可能的，”Ron Schmelzer如是说到，他是ZapThink的高级SOA分析师。
"Complete decoupling is incredibly difficult and expensive, if not impossible," says Ron Schmelzer, senior analyst from the SOA analyst firm ZapThink.
从理论上论证了根据直接线性变换系数采用影像内定向方法进行普通数码相机方位元素解算的不可行性。
It is confirmed that it is not feasible to calculate the orientation elements of common digital camera according to the DLT indexes using image inner direction method.
要利用这种近似解来模拟大爆炸在以前是不可能实现的。
The kinds of approximations needed to, for example, simulate a firestorm, were in the past computationally intractable.
煤热解是气化过程中重要的、不可分割的过程。
Pyrolysis is an essential process occurred in all gasifications.
理论上已经证明要在多项式时间复杂度内对这一类问题找到全局最优解是不可能的。
The fact that it is impossible to find the global optimum in polynomial complexity has been proved.
其中，磁通能否准确观测是解耦的关键，但转子磁通是不可能准确观测的。
Unfortunately, the rotor flux which is important in the method can not be observed precisely until now.
因此，不可能应用某种定量的方法得到精确的最优解，而只能得到满意解。
So, we cannot use a certain quantitative method to get an accurate optimum solution, and only can figure out with satisfaction.
本文提出了一种解非线性不可微方程的迭代方法，分析了其收敛性并给出了误差估计，取得了很好的效果。
In this paper, a method is presented for solving non differentiable equations in Banach space. At the same time, we analysis its convergence and get error estimates.
路网结构的复杂性和运输生产的动态性，决定了要获得较大规模的实际空车调配问题的最优解是不可能或非常困难的。
Because of the complexity and dynamic nature of the railway transportation network, it is difficult, or even impossible, to find an optimal solution for an actual large scale empty car distribution.
从而获得了原不可解泛函方程的解析递推表达式和一个易于实施的控制律的解析解。
Thus, the explicit recursive expression of the original unsolvable functional equation and a control law with easy implementation are obtained.
考虑BSO晶体的旋光性，电光效应、压电效应、弹光效应时，要求解耦合方程得到解析解是不可能的。
However, due to presence of optical activity, the electrooptic, piezoelectric and photoelastic effects in BSO, it is difficult to get the analytical results.
在积分常数为零的条件下，证明了该方程存在光滑孤立波解、不可数无穷多光滑周期波解、扭结波和反扭结波解。
When the integral constant is zero, the existence of smooth solitary wave solutions, uncountably infinite, many smooth periodic wave solutions, and kink and anti-kink wave solutions are proved.
利用这些结果得到了二元拉伐尔喷管内不可压缩位势流动的精确解。
Making use of these results, we obtained an exact solution for the incompressible potential flow through a two-dimensional Laval nozzle.
由此，提出了遗传算法求解作业车间调度新的编码方法，能够彻底避免产生不可行调度解，大大提高了遗传算法的质量。
We improve on the encoding schema of GA to solve JSP, it reduces occurrence of the unfeasible scheduling solution, then enhances the quality of GA.
讨论了在弹簧振子质量不可忽略的条件下，弹簧振子系统振动固有频率的精确解。
This paper derives the precise solution about the inherent frequency of the mass-spring system when the mass of the harmonic-spring is not negligible.
本文基于理想不可压轴对称位流理论，导得纵向加速流绕椭球流动的精确解；
Based on the axisymmetrical potential flow theory of an invicid incompressible fluid, the exact solution of an longitudinally accelerated flow passing an ellipsoid was obtained.
描述人造卫星运动的微分方程非常复杂，不可能给出解的解析表达式。
The differential equations that describe the artificial satellite motion are very complicated, and it is impossible to get the analytic express of solution.
描述人造卫星运动的微分方程非常复杂，不可能给出解的解析表达式。
The differential equations that describe the artificial satellite motion are very complicated, and it is impossible to get the analytic express of solution.
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