美国有一个问题，通常只有有钱人家的孩子才能去最好的学校上学，而这实际上是一个难题。
We have a problem in the United States that usually only wealthy kids go to the best schools and it's kind of a problem actually.
这给气候科学家们带来了一个难题。
对于那些使用恒定的冰川融化的水作为饮用水的数百万人来说，冰川面积不断缩小是一个难题。
Shrinking glaciers are a problem for million is of people who use regular glacier melt for drinking water.
这带来了两个难题。
这就造成了一个难题：数百万年前消失的特征是如何突然重现的？
And this poses a puzzle: how can characteristics that disappeared millions of years ago suddenly reappear?
即使没有区域差异的问题，岩石作为独特的时间标记也是一个难题。
Even without the problem of regional differences, rocks present a difficulty as unique time markers.
专家们一致认为在未来几十年内将出现一个难题：如何在不破坏地球的情况下养活90亿人口。
Experts agree that the next few decades will present a puzzle: how to feed nine billion people without wrecking the planet in the process.
区分合法矿主和非法占有者是个难题。
Distinguishing between legitimate miners and rogues is hard.
但这之中隐藏着另一个难题。
达登暗示一段时间后食品价格上涨将是一个难题。
Darden hinted that rising food costs could be a problem down the road.
一切听起来都合情合理，但有一个难题。
Sendmail帮助我解决了两个难题。
另一个难题是，几乎所有通讯系统都被破坏了。
Another problem was that almost all communication systems were destroyed.
这无疑给FAO和WHO等一些国际性组织出了个难题。
This puts international organisations like the FAO and the WHO in a difficult position.
键选择：多维数据建模中的键选择是一个难题。
Key selection: Key selection in multidimensional data modeling is a difficult issue.
保诚面临的另一个难题是财政收支不是特别平衡。
The Pru’s financing is not particularly leveraged, another common pitfall.
保诚面临的另一个难题是财政收支不是特别平衡。
The Pru's financing is not particularly leveraged, another common pitfall.
这实在是一个难题，并且我敢说你们中的一些人也为其所困。
It is a very difficult question and I daresay that some of you have been troubled by it.
森先生最新的书籍就是很权威地回答了这两个难题。
Mr Sen's latest book answers both difficulties in magisterial style.
在中国的长江以南地区，很多人冬天供暖还是个难题。
In China, south of the Yangtze River, many of my countrymen still have no central heating.
本书最有趣的部分事关美国应该与谁对话这样一个难题。
The most interesting section of the book deals with the dilemma over whom America should talk to.
对于今天的科学家来说，数据泛滥不能不失为一个难题。
For today's scientists, that data deluge represents a conundrum.
其中一个难题就是手机的广泛应用只是很短时期里的事情。
One problem is that mobile phones have been in widespread use for a relatively short period of time.
但是，这引出了一个难题：外国的援助应该给穷人还是穷国？
But it raises hard questions about whether foreign aid should be for poor people or poor countries.
这是一个难题，因为对关于神真正是什么给了我们错误的观念。
This is a problem because it gives us a false concept of what God is really like.
这是一个难题，因为这些问题不应该被限制在某个特定的行业。
This is a problem, because these concerns shouldn't be tied to a particular industry.
让我问你一个难题：在你的生命中，有什么事你假装不是问题？
Let me ask you a tough question: What are you pretending isn't a problem in your life?
这个意念界面，其目的是面向现有的手机装置去解决两个难题。
The imaginary interface aims to solve two problems faced by existing mobile devices.
这个意念界面，其目的是面向现有的手机装置去解决两个难题。
The imaginary interface aims to solve two problems faced by existing mobile devices.
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