The problem of hunger worldwide is a hard nut to crack. I'm afraid that scientists need to put in more efforts.
全球性的饥饿问题是个棘手的问题，恐怕科学家们需要付出更多的努力。
But if any rookie hacker with some time to kill can crack your system, that's a problem.
不过，如果就连一个闲得无聊的菜鸟黑客也能攻陷你的系统的话，这就有问题了。
The crack on the wall of building, which is a common disease of the building that the users complain very strongly recent years, is a common quality problem.
建筑物墙体的裂缝是近年来用户反映比较强烈的建筑通病，也是常见的质量问题。
Bridge crack in concrete bridge construction is a frequently - encountered problem, how to Tate effective measures to prevent and control the cracks in the works must be resolved.
桥梁混凝土裂缝是桥梁施工中经常碰到的问题，采取有效措施预防与控制裂缝是在工程施工中所必须要解决的。
Wall crack control is a complex problem that requires the coordination of materials, design, construction and other aspects.
墙体裂缝的控制是一个复杂的问题，需要材料、设计、施工等方面的相互协调、共同配合。
How to discover the dangerous slight crack in early stage in labor pillar insulator and porcelain cover, is a problem of the overhaul in step-up station and substation.
如何早期发现在役支柱绝缘子及瓷套中存在的危及安全运行的裂纹，一直是升压站和变电站检修的难题。
A type of composite substrate was explored to solve the problem of crack in the deposition of diamond films, that is, mo substrates with ti interlayer.
为了解决金刚石膜脱膜开裂的问题，尝试了一种复合衬底，即镀有钛过渡层的钼衬底。
The purpose of this paper is to apply GFEM to make a research on concrete crack problem, so find a new way to the numerical simulation of concrete structure crack.
本文旨在应用广义有限元法研究混凝土的开裂问题，为混凝土结构裂缝的数值模拟工作开辟一条新的途径。
For this problem, a Multiple Model Adaptive Estimator (MMAE) based method for rotor crack diagnosis is proposed.
针对这个问题，提出了基于多模型估计(MMAE)的转子裂纹故障诊断方法。
The basic idea is to use the single crack solution and the expansions of the local coordinates to reduce the complicated problem into a set of linear algebraic equations.
基本思想是首先利用圆盘状单裂纹之解以及局部坐标展开法将裂纹群问题化为求解一组线代数方程。
Generation of powerful pulse current is a key problem for crack arrest by electromagnetic heat effect.
如何产生高强度脉冲电流是应用电磁热效应遏制金属裂纹扩展的一个关键问题。
This problem can be solved effectively by a newly researched sensing means, i. e. crack detection by embedding distributed optical fiber into civil engineering works.
新近开始研究的一种监测手段——在土木工程中埋入分布式光纤传感器进行裂缝监测可以有效地解决这一难题。
Crack problem in masonry structure is a pervasively existing but not readily soluble engineering practical problem.
砌体结构的裂缝问题是一个普遍存在而又难于解决的工程实际问题。
A torsional impact problem of a cylindrical crack in a functionally graded pipe is investigated.
该文研究了含环形裂纹功能梯度管的扭转冲击问题。
The problem of a single parallel crack near a circular inclusion was also studied.
最后对圆形夹杂附近单平行裂纹问题进行了研究。
In this paper, the problem of an infinite plane with a circular hole welded by a nearly circular plate with a crack of different material is considered.
本文讨论了在带圆孔的无限平面中焊接一个不同材料的带裂纹的近似圆板的问题。
The method reduces a three-dimension problem of the surface crack into a quasi-one-dimension problem and can be used to analyze a surface cracked plate under various loading conditions.
该方法把表面裂纹这一三维问题简化为拟一维问题，可用于分析受到多种载荷作用的含表面裂纹的板。
The problem of a cylindrical interface crack is reduced to a system of singular integral equations with the aid of two unknown dislocation functions at the interface crack surface.
以裂纹面上的位错函数为未知量将圆柱型界面裂纹问题化成一组奇异积分方程的求解问题。
The nano ceramics with high performance was educed as a substitute because of the problem of crack in ceramics, and the way of producing nano ceramics were introduced in details.
通过分析普通陶瓷存在的裂纹缺陷问题，由此引出高性能的替代材料纳米陶瓷。
In this paper, the torsion crack problem for a bar with cross section containing cusp points is discussed.
在本文中讨论了带裂纹杆的扭转问题，并设扦的截面周边具有回归点。
It is a big difficult problem to repair the crack of gear box if wheel motor in wheel motor repairing. This paper makes a systematic statement for the reason and way out of the problem.
轮马达齿轮箱裂纹修复是轮马达修理中的一大难题，长期未能解决。本文系统阐述其产生的原因以及解决办法，对创建无泄漏和现场达标有重要意义。
A big technical problem for mass concrete structures during pouring is how to control crack expansion.
大体积混凝土在浇筑中的一个重要技术课题是控制裂缝扩展。
It is still a unsolved problem that semi - rigid base appears the shrinking crack at early stage.
半刚性基层早期出现收缩裂缝，是目前尚未很好解决的施工技术问题。
This problem is a hard nut to crack.
这个问题是块难啃的骨头。
Crack in concrete works is a widespread and intractable engineering practical problem.
混凝土工程裂缝问题是一个普遍存在而又难以解决的工程实际问题。
It is a big difficult problem to repair the crack of gear box if wheel motor in wheel motor repairing.
轮马达齿轮箱裂纹修复是轮马达修理中的一大难题，长期未能解决。
Semi-weight function method is used and developed in this paper to solve the problem of two bonded dissimilar materials containing a crack along the bond.
应用半权函数法求解双材料界面裂纹的应力强度因子，得到以半权函数对参考位移与应力加权积分的形式表示的应力强度因子。
In recent years, the other two forms of damage - water damage and reflective crack is gradually attracting attention, but also has become a world-wide problem.
近年来，另外两种破坏形式——水损害和反射裂缝也逐渐引起人们的注意，也已形成世界性范围的问题。
By using the Fourier transform, the problem can be solved with a pair of dual integral equations in which the unknown variable is the jump of displacements across the crack surfaces.
首先利用付里叶变换，使问题的求解转换成对一对变量为裂纹面上位移差的对偶积分方程的求解。
By using the Fourier transform, the problem can be solved with a pair of dual integral equations in which the unknown variable is the jump of displacements across the crack surfaces.
首先利用付里叶变换，使问题的求解转换成对一对变量为裂纹面上位移差的对偶积分方程的求解。
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