This turns out to be a hard problem.
这其实是一个很难的问题。
这是个困难的问题。
Name rectification is a hard problem.
正名是一个困难的问题。
They found it a hard problem to think about.
他们发现这是一考虑的难题。
The woman teacher set her students a hard problem.
老师的解释使我们搞清楚了对问题的误解。
Clustering has historically been a hard problem to solve.
集群一直以来都是难以解决的问题。
The technique of Sniffer Discovery is a hard problem in network security.
嗅探器发现技术是网络安全中重要问题。
The software architecture problem for an interactive system is a hard problem.
软件体系结构是交互系统的重要问题。
Simulating a quantum computer on a traditional classical computer is a hard problem.
在一台传统的经典计算机上模拟量子计算机是个难题。
Data mining in incomplete information system is a hard problem but inevitable in uncertain decision.
不完备信息下的数据挖掘是一个难题，但它在实际决策中是不可避免的。
Though it is hard work, it is still a solvable problem.
虽然这是一项艰巨的工作，但仍然是一个可以解决的问题。
Because of the hard life, she got a stomach problem.
由于生活艰苦，她得了胃病。
If finding a problem is hard, you're in the wrong field.
如果你很难找到一个问题，那么你肯定是找错了方向。
This is also a very hard problem that is, in a sense, easy.
它也是一个非常难的问题虽然它乍一看很简单。
But there's a problem: scientific research on race is hard to come by, and it's not difficult to see why.
但是有一个问题：有关种族的科学研究很难得，很难了解其原因。
The problem is you have a hard time choosing among your many suitors.
问题是在众多的侯选者当中，你很难作出选择。
A performance problem with a system is often very hard to solve.
针对系统的性能问题常常是非常难解决的。
It's hard to imagine that a failure to persuade is the problem.
很难想像问题的症结在于未能完全有效的进行劝说。
Often, hard-to-budge weight is a symptom of a hidden medical problem.
难以控制的体重往往是隐藏疾病的一个症状。
Thinking about how hard something is is a big problem for most people.
想象某件事如何之难办是多数人都有的困扰。
An expert would have no problem with it, but for me, this is a pretty hard shot.
一位专家将没有问题，但对我来说，这是一个相当困难的镜头。
The telecom engineer is working hard to solve a problem at our local telephone exchange.
电信工程师正在努力解决我们当地电话交换中心的一个问题。
That means taking a hard look at our personality type's potential problem areas.
这就意味着要重视我们性格类型的潜在问题区域。
In order to solve this mechanical problem, they work hard and hatch a genius plan.
为了解决这个机械问题，他们辛苦工作，制定出了这个天才计划。
The fill in problem for graphs is a well known NP hard problem.
图的最小填充问题是熟知的NP-困难问题。
He thought hard and found a way to solve the problem at last.
他努力思考，最后终于想出一个解决这个问题的办法。
Power network planning is a NP hard problem difficult to be solved.
电网规划是一个较难解决的NP难问题。
Automatic test paper generation is a NP hard problem while restrictions exist.
试题库自动组卷问题是一个NP难题。
I had a hard time working out the math problem.
做出这道数学题我很费力。
I had a hard time working out the math problem.
做出这道数学题我很费力。
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