Extracting heat from very hot, dry rocks presents a more difficult problem: the rocks must be fractured to permit the circulation of water, and the water must be provided artificially.
从极热的而干燥的岩石中提取热量，暴露出了一个更加困难的问题：必须击碎岩石以保证水的循环，而水必须是人工提供的。
If a problem can be solved by money alone, it is not really a difficult problem.
如果仅仅用金钱就可解决一个问题，那么这不是一个真正困难的问题。
Here's how to view this as an antipattern: I've started with a difficult problem.
下面是在反模式中考虑这个问题的方式：我从一个很难的问题开始。
The field of aesthetics presents an especially difficult problem to the historian.
美学领域向历史学家提出了一个格外困难的问题。
SAN DIEGO — One way to get noticed as a scientist is to tackle a really difficult problem.
美国圣地亚哥（SAN DIEGO）——作为科学家使自己被别人所知的一个方法就是去解决一个真正困难的问题。
Fluid type identification of fracture reservoir is a worldwide difficult problem.
裂缝性储层流体类型识别一直是测井界亟待解决的难题。
Soil-pile-structure interaction was a difficult problem in bridge seismic engineering.
桩—土—结构相互作用问题一直是桥梁抗震研究中的难点。
On the surface, this seems like a difficult problem, but in fact there's an easy solution to it.
表面看来，这问题似乎很难，但实际上答案很简单。
Her detailed explanation has contributed enormously to our understanding of this difficult problem.
她的详细解释极有助于我们对这个困难问题的了解。
Poplar anti-insect genetic engineering provides an effective way for solving this difficult problem.
而杨树抗虫基因工程为解决这个难题提供了一条有效途径。
The best part of being a research engineer is discovering a new and better solution to a difficult problem.
作为研究型的工程师，最令人兴奋的莫过于能够发现解决难题的更新更好的办法。
A much more difficult problem for the retailer is to assure that replenishments for the back room are delivered in time.
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？
In geotechnical engineering, construction in miscellaneous soil-filling areas has been a key and difficult problem.
在岩土工程中，杂填土区的施工历来是施工项目中的重点和难点部分。
The other, “the most important and difficult problem of academia in Italy”, was its “non-transparent recruitment system”.
而另外一个“意大利学术界最主要也最难的问题”是它的“不透明的招聘体系”。
This shows how, by very simple means, in a family constellation we can reach a solution for such a difficult problem.
这个案例以非常简单的方式告诉我们，在一个家庭系统中我们可以为这样的难题找到一个解决方案。
The hydraulic calculation of vent line is an interesting but difficult problem in natural gas gathering engineering design.
放空管路水力计算是天然气集输工程设计中一个令人极感兴趣、却又常常使人困惑的问题。
The later construction settlement of high way and railway is the difficult problem studied in theory and engineering circles.
高等级道路和铁路的工后沉降一直是理论界和工程界关心与研究的难点问题。
The difficult problem is satisfactorily solved. The machining precision and the surface quality reach the design requirements.
初步解决了该加工难题，加工精度、表面质量均符合设计要求。
When small fish face an extremely difficult problem-an attack, say, from several predators at once-they deal with it by forming a school.
当小鱼面临极其困难的问题时，比如说，突然遭到几个捕食者的袭击，他们会立刻形成鱼群。
Obviously this is a difficult problem, but the incentive to solve it is very big. The main approaches fall into the following categories.
显然，这是一个很困难的问题，但是解决它的激励也很大。
Structural health intelligent inspection has already become a hot spot and difficult problem in civil engineering community currently.
结构健康智能监测是当前国内外土木工程界新的研究热点和难点，具有重要的理论和工程应用价值。
Building parsers by hand can be quicker and easier for smaller languages, but it tends to become a difficult problem as the language gets larger.
对于较小型的语言，手工构建解析器可能更快速、更容易，但是当语言变得更庞大时，这就成了一个困难的问题。
The tension between educational theory and practice is the difficult problem always obsessing the educational theory researchers and teachers.
教育理论与实践的紧张关系一直是困扰教育研究者和教师的难题。
In other words, if you spend energy trying to resist a fragrant chocolate chip cookie, you'll have less energy left over to solve a difficult problem.
也就是说，如果你花费精力去抵制一块巧克力饼干的诱惑，那么解决难题的精力就会减少。
You think she is stupid, but it is the other way around. Yesterday she worked out a difficult problem that none of her classmates could work out.
你认为她很笨，但恰好相反。昨天她算出了一道没有哪个同学能算出的难题。
You think she is stupid, but it is the other way around. Yesterday she worked out a difficult problem that none of her classmates could work out.
你认为她很笨，但恰好相反。昨天她算出了一道没有哪个同学能算出的难题。
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