In the past this process of transition has often proven difficult.
在过去，这种转变过程常证明是艰难的。
Reducing demand has proven difficult.
事实证明，降低需求非常困难。
But finding nascent massive stars has proven difficult.
但找到新生的巨型恒星很不容易。
Someone who makes a wise judgment about something that has previously proven difficult to resolve.
某人对先前难以解决的事情做出了睿智的了断。
In the complex field of human resources for health, finding accurate data and analyzing situations has proven difficult.
事实证明，在卫生人力资源这个复杂的领域，很难获得准确的数据并进行情况分析。
That guiding process has proven difficult to do efficiently, especially for creating insulin-producing cells, Gearhart noted.
这个引导转化过程非常困难，尤其是对于转化成能分泌胰岛素的细胞。
Getting a solid recap of the panel has proven difficult, so if any new info's come out that we've missed, we'll be sure to let you know.
捕捉完整充实的重述内容是有点困难的，所以如果有任何已经透露的消息我们遗漏了，我们肯定会让大家知道。
Yet peace will remain elusive unless the international community can deal with the five binds that have proven difficult to escape in Afghanistan.
然而，和平仍然难以捉摸，除非国际社会能处理阿富汗无法回避的五大难题。
In recent years, reports linking vaccines to autism have been debunked, but fears of adverse events — which experts say are rare — have proven difficult to erase.
近年来，一些将疫苗同自闭症相联系的报告已被证明是错误的，专家也表示注射疫苗后很少出现不良事件，但是，人们对此所产生的恐惧却很难消除。
Last but not least, portals have proven difficult to integrate with the party systems and processes as they do not necessarily expose services associated to their presentation layer.
最后而且同样重要的，门户已经证实了当不需要展示与他们相关联的表示层的服务时，要与一方系统和流程整合起来是困难的。
School was founded in 1582, Britain's six oldest and largest universities, it is with the Oxford and Cambridge famous, is the UK's fourth largest proven difficult to apply for university.
学校始建于1582年，是英国六所最古老、最大的大学之一，它与牛津、剑桥大学齐名，是英国公认的第四大难以申请的大学。
Although BCEL has worked for this purpose, it's sometimes proven more difficult to use than I'd expected when I began the project.
虽然BCEL可以用于实现这个目的，但是，它有时使用起来要比我开始这个项目时期望的更困难。
They understand that development is a difficult social activity that can be conquered not by a silver bullet, but rather by dedicated, skillful practitioners who know and leverage proven techniques.
开发是一项有难度的社会活动，不仅不能够通过银弹来征服，而是由理解并实施可靠技术的那些专注且熟练的人们来解决。
Supporting many browser clients has since proven problematic but nowhere near as difficult as supporting native user-interface libraries.
支持多种浏览器客户机虽还有一定问题，但是不像支持本地用户界面库那样困难。
But picking off assets has proven to be difficult, largely because of a lack of agreement on how to arrive at a fair value for bombed-out financial instruments bereft of a market.
但是抵押资产的处理有相当的难度，很大程度上因为市场的缺失，很难为已经遍体鳞伤的金融工具进行合理的估价。
Finding a universal definition of marriage, though, has proven to be difficult.
尽管要对婚姻进行定义确实困难重重。
As well as adopting advanced aerospace technologies, the J-10 also USES proven reliable designs to lower the technical difficult and costs.
J - 10既采用了高端的航空技术，也采用了一些可靠的设计去降低技术困难和成本。
All that’s left now is to get the water into the Phoenix’s instruments, a task which has occasionally proven more difficult than anticipated.
剩下的事情就是把水采集进火星车，该任务有时候会比预期的要复杂一些。
The deployment of the missiles on a submarine significantly increases their survivability, as even today finding a missile submarine prior to launch is proven to be very difficult.
在一艘潜艇上部署导弹重要地增加它们的生存性，因为即使在今天当一艘导弹潜艇发射之前发现它被证明是非常困难地。
They tend to be difficult to get to know well, and hold back parts of themselves until the other person has proven themselves "worthy" of hearing the INTP's thoughts.
他们往往是难以被了解的，并会在人前隐藏部分的自我，除非他人证明自己“值得”听取INTP的思想。
Prior research has led to materials that are only semi-effective, and those based on biological examples, such as mosquito eyes have proven to be too difficult to mass produce.
而之前研究的材料仅仅是半功能性的，且这些基于生物实例(如蚊子眼睛)的产品难以大量生产。
Staged treatment with initial spanning external fixation of the ankle has proven to be a successful strategy for the treatment of these difficult fractures in many cases.
阶段性治疗——开始使用外固定支架固定踝关节来治疗这些困难的骨折已经在很多病例被证实为一种成功的治疗策略。
Even then competing Apple is difficult, because the company has proven to be a viable force to be reckoned with across all the areas within which it competes.
即便这样，叫板苹果仍相当困难，原因是它在同行中已经能自如应付所有问题。
Studying microorganisms has proven very difficult in the past, because most naturally occurring types do not grow in the lab.
过去，研究微生物是一件很困难的事，因为许多自然界发生的事无法搬到实验室里。
However, improving the internal combustion engine in this respect has proven to be extremely difficult without sacrificing performance.
然而，提高内燃机在这方面已被证明是非常困难的不牺牲性能。
However, improving the internal combustion engine in this respect has proven to be extremely difficult without sacrificing performance.
然而，提高内燃机在这方面已被证明是非常困难的不牺牲性能。
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