问题是

It is shown that the insensitivity conditions are equivalent to the null controllability problem of a cascade system.

不灵敏控制问题是能控性的一个分支，半线性热方程的不灵敏控制问题即可转化为一个串联系统的能控性问题。

But the following case shows that whether a particular issue is one of fact or one of law may sometimes be hard to decide.

但下列案例表明，究竟这个特定的问题是一个事实问题还是一个法律问题，有时会很难决断。

The existence of a large set of pairwise disjoint Kirkman triple systems is an old and interesting combinatorial problem.

中文摘要：两两不交的Kirkman三元系大集的存在性问题是个古老而有趣的组合问题，它源于1850年的"Sylvester 15女生问题"。

Knapsack problem is a famous NPC problem, there is no effective method to solve this question at present.

背包问题是一个NP 完全问题，目前还没有解决这一问题的非常有效的方法。

Social psychology research about laid-off and unemployed worker are very few,soit is necessary to make more lucubrate study.

本文研究的问题是我国国企下岗失业职工的社会适应问题，即国企职工下岗失业的社会心理后果问题。

The author considers that among these issues the problem of low ability of majordomo is very essential and effective and resolution of this problem is every useful.

作者认为这些问题当中，总监的工作能力低下问题是一个非常关键的，且解决后收效较好的具体问题。

Research on these problems may make theoretical and cognitive preparation for further research.

国有企业和国有企业财务监督的基本概念及相关问题是研究国有企业财务监督问题首先要关注的，对这些问题的研究可为下一步的研究工作做好理论和认识上的铺垫准备。

The minimum set covering problem is an important NP-hard problem on hyper graphs.

最小集合覆盖问题是NP完全问题中非常重要的一个问题。

The minimum Steiner tree problem is one of the NP-hard problems, which has extensive applications in many real-world problem,such as communications network.

最小Steiner树问题是NP难问题，它在通信网络等许多实际问题中有着广泛的应用。

As we all know, many societal problems like unemployment, disparity between the rich and the poor and misgovernment are caused due to the asymmetric development of city. And they have become a crucial reason for those less effectively curable societal problems, rendering a worsening public security situation and a mounting rate of crime commitment. To some extent, particularly the problem of floating populations crime commitment is so serious that it has already affected the development and stability of city.

由于城市发展的不均衡，导致了诸如：失业、贫富悬殊、管理不当等社会问题的出现，而这些没有得到有效根治的社会问题是我国治安形势恶化的主要原因，犯罪率不断上升，而城市中流动人口犯罪的问题显得由为突出，在一定程度上已影响了城市的发展与稳定。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。