为本科生主讲课程有《难解问题的算法》；
Research Course for undergraduate students Algorithms for Hard Problems;
不过，在写诗篇的时候，大卫是一个追求敬虔的人，这意味着他探讨上帝对这些难解问题的真正心意。
But as he penned the Psalms, he was a man in search of godliness, which meant he probed god's mind about difficult subjects.
在对目前已有证书状态发布方案分析的基础上，本文提出基于二次剩余难解问题的证书撤销状态发布方案。
Following the analysis of the existing certificate revocation schemes, we propose a new certificate revocation scheme based the difficulty of resolving the Quadratic Residues problem.
本文利用椭圆曲线上离散对数难解问题，提出了一种新的密钥认证方案，密钥由用户口令和秘密密钥组成。
A new key authentication scheme was proposed. This new scheme is based on the intractability of elliptic discrete logarithms. The key is combination of password and private key.
目前的数字签名和代理数字签名方案大都是基于普通离散对数难解问题上的，其安全性已经不能满足人们的需求。
At present, digital signature and proxy digital signature schemes are almost based on ordinary separate logarithm question. And the security of the schemes couldn't satisfy the request of the people.
黑白旅行商问题(BWTSP)是近年来出现的新NP -难解问题，根据图中边是否对称可以分为无向BWTSP和有向BWTSP两种。
The black and white salesman problem (BWTSP) is a new NP-hard problem, which can be divided into the undirected BWTSP and the directed BWTSP according to the symmetry of edges in graph.
这些问题太难解决了。
这些问题很难解决。请给我一些建议。
The problems are difficult to solve. Please give me some advice.
·扑灭森林大火被认为是世界上最难解决的问题之一。
Putting out forest fire is regarded as one of the most difficult problems in the world.
因此，当您使用真实的代码时，就可能会碰到可移植性问题 ——不过大部分问题都是由于意外造成的困难，而不是因为问题本身很难解决。
So, when you have real code, you might run into portability problems -- but most of them are accidental difficulties, not real challenges inherent in the problem.
历史上最难解决的一个兼容性问题是在 makefile 中对包含的处理。
One of the most frustrating historical compatibility problems is handling inclusion in makefiles.
而一旦确诊后，是否用药物治疗抑郁还是个难解决的问题。
But once diagnosed, the question of whether to treat antenatal depression with drugs is a difficult one.
这些工具都很强大，但是有一些共同的问题它们都很难解决。
The tools are sophisticated, but there are a common set of problems which they handle poorly.
二氧化碳的问题很难解决，然而，因为它主要来源于化石燃料的燃烧，这在现代生活和商业中是必不可少的。
The carbon dioxide problem is hard to fix, however, because it comes mainly from the burning of fossil fuels, which is so essential to modern life and commerce.
有时可能会出现较难解决的问题，这可能会导致资源花费更多的时间解决该问题。
Sometimes a more difficult question arises, which causes the resource to spend a far greater amount of time solving the problem.
许多开发人员发现约束违反是一种很难解决的类装入问题。
Many developers find constraint violations to be a difficult type of class loading problem to resolve.
此外，本文还提供了常见连接问题的疑难解答技巧和跟踪选项。
In addition, it provided troubleshooting techniques for common connection problems and tracing options.
在将网络层作为整体处理时，很难解决诸如某些客户机带宽有限这样的问题。
It's hard to solve problems such as limited bandwidth of some clients while working with the network layer as a whole.
推理统计学是一套已定形了的方法体系，它解决的是光凭人脑极难解决的另一类问题。
Inferential statistics is a formalized body of methods for solving another class of problems that present great difficulties for the unaided human mind.
而另一方面，对于“NP”类问题来说，答案可能很难解得——可能需要数十亿年的时间进行计算——但一旦得到了答案，它很容易检验。
Meanwhile, for "NP" problems, a solution might be very hard to find — perhaps requiring billions of years' worth of computation — but once found, it is easily checked.
但是，零售商还有一个更难解决的问题：如何确保补充的产品及时交付到仓库？
A much more difficult problem for the retailer is to assure that replenishments for the back room are delivered in time.
奥巴马接手的在中东的实际问题证明是非常顽固的，很难解决。
The practical problems Mr Obama inherited in the Middle East have proved obstinately hard to resolve.
通常来说，有越多的开发人员参加，问题就变得越复杂越难解决。
Generally, the more developers that you have, the more complex and difficult it becomes to keep everything together.
长期以来，过于雄心勃勃的全球气候谈判的重点是最难解决的全球变暖的问题。
For too long, overly ambitious global climate talks have focused on the aspects of global warming that are hardest to solve.
较难解决的一个问题是缺少一个可以执行的大框架。
The tough problem is that technical solutions need a framework in which they can be executed.
可能我们不应该立马去谴责过去的决定，但要认识到有时会产生很难解决的问题。
And perhaps we should not be so quick to condemn the decisions of the past, but recognize that sometimes there are problems for which there are no easy solutions.
但也是最难解决的问题，主要是因为没有不缩减银行资产负债规模――在某种意思上这有损信贷――的方法能轻易取而代之。
Yet it is also the hardest issue of all to grapple with, not least because there is no easy way to replace it without shrinking banks’ balance-sheets in a manner that damages the supply of credit.
然而，霍尔布鲁克仍然相信美国是世界的问题解决者，以“其意愿和实力”，美国能解决最难解决的问题。
Mr Holbrooke, however, still believed that America was the world's problem-solver, and that with "all its will and all its strength" it could put the most benighted spots to rights.
然而，霍尔布鲁克仍然相信美国是世界的问题解决者，以“其意愿和实力”，美国能解决最难解决的问题。
Mr Holbrooke, however, still believed that America was the world's problem-solver, and that with "all its will and all its strength" it could put the most benighted spots to rights.
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