Some San Jose residents say that as inequality has grown in recent years, upward mobility has become much more difficult to achieve.
圣何塞的一些居民表示，随着近年来不平等现象的加剧，实现向上流动变得更加困难。
That may be especially difficult to achieve in Africa.
这或许特别难以在非洲化为现实。
The balance is increasingly difficult to achieve don't you think?
两者的平衡越来越难以达到。你说呢？
This optimal dosage is very difficult to achieve from taking food alone!
这个量单从食物中摄取是很难达到的！
It's really, really difficult to achieve that full potential in the real world.
在现实中充分发挥潜力，实现目标确确实实很困难。
With this in mind, it becomes difficult to achieve specific goals together.
因为每个人的想法不同，就很难一起达到某一特定目标。
That requires industry-wide cooperation, which has been difficult to achieve.
这要求整个行业进行协作，但通常很难办到。
Such unknowns will make international agreement on these measures difficult to achieve.
这些未知的因素使得有关这些措施的国际协定难以实现。
Nothing is easy here, progress is difficult to achieve and it is difficult to sustain and build on.
他说：“在这里，什么事都不容易，很难取得进展，而且很难保持和进一步推动。”
Another quality of line that's more difficult to achieve is variation in the softness and hardness.
线的另一性质更加难以企及，那便是软硬的变化。
This goal will probably be more difficult to achieve than anything else the foundation works on.
和基金会从事的任何其它工作相比，这个目标或许更难实现。
However, without the initial record of the change set it would be extremely difficult to achieve.
然而，没有变更组合的最初记录，它将很难实现。
But getting artwork exhibited publicly is difficult to achieve and I want to open that door for people.
要公开展示艺术作品并非易事，我要为大家打开一扇门。
You see the descriptions we give the the word "goal" implies your objective will be difficult to achieve.
你知道，我们赋予“目标”一词的说明意味着你的目标很难完成。
The only problem is that it can be extremely difficult to achieve such a following, which is where we come in.
唯一的问题是，拥有这么多追随者是一件很难的事，而这也正是我们的切入点。
Transparency can be difficult to achieve (depending on your work environment), but can be greatly beneficial.
透明很难实现(取决于你的工作环境)，但却非常有益处。
While infinite horizontal linear scalability is difficult to achieve, infinite vertical scalability is impossible.
虽然无限的水平线性可扩展性是难以实现的，无限的垂直扩展性也是不可能的。
In such cases, it might be very difficult to achieve semantic transparency through natural language schema annotations.
这种情况下，通过自然语言的模式注释来获得语义透明性可能非常困难。
Finally, as I discussed earlier, threads out of the server's control make it difficult to achieve an orderly shutdown.
最后，正如我以前讨论过的，不受服务器控制的线程会造成有序关机很难实现。
In software, though, things are not often designed in that way, mainly because good modularity is difficult to achieve.
但是，在软件中，事物则并不是按照这样的思路设计的，这主要是因为实现良好的模块化非常困难。
Unless the epidemic of NCDs is aggressively confronted, the global goal of reducing poverty will be difficult to achieve.
除非我们能够积极处理非传染性疾病的流行问题，否则，将难以实现减贫的全球目标。
Semantic interoperability is very difficult to achieve for various reasons. The following are examples of why this happens.
由于各种原因，语义互操作性很难实现。
In fact, given that traditional economic forecasts miss structural breaks all the time, it is both difficult to achieve and useful.
事实上，考虑到传统经济预测始终忽略了结构性突变，这种预测不仅难度很大，也很有用。
But the experience of other Asian countries over the past fifty years suggests that this rebalancing is extremely difficult to achieve.
但是从过去半个世纪里其他亚洲国家的经验看来这样的再平衡是极其难以达到的。
In an age where cynicism reigns, and where stress is an integral part of our lives, happiness seems more and more difficult to achieve.
在这样一个愤世嫉俗的时代，压力如影随形，幸福似乎越来越难以企及。
Iterative testing is difficult to achieve if quickly developed components are dependent on key interfaces with longer development cycles.
如果快速开发组件依赖于关键接口且开发周期较长，迭代测试就难以实现。
The goal will be more difficult to achieve as G.M. and Chrysler mount their own turnaround efforts with less debt and leaner organizations.
如今，伴随着通用公司、克莱斯勒相继走出破产保护，利用更低的债务来复苏这一目标似乎更难实现。
This strategy allows powerful code refactoring tools, which are much more difficult to achieve using the same methods for statically typed languages.
这一策略允许使用强大的代码重构工具，而使用静态类型语言的同样方法来实现此功能则困难得多。
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