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But for people who have a difficult time controlling their movements, this little navigational issue can be a really big problem.
VOA: special.2011.04.18
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And scientists have been working on this for years and there's been progress, but it's still a very difficult challenge.
科学家们对此已经研究很久了,并取得了进展,但仍有很大挑战
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And in that sense, a lot of my classes are difficult, I have a lot of help on.
虽然有些课程很难，但总能得到很多帮助。
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But small farmers often have a difficult time getting their animals to market.
VOA: special.2010.08.03
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I don't want to have to deal with heat escaping to the outside environment in a way that might be difficult or complicated to measure or calculate.
我可不想处理跑到,环境中去的热量，那测量或,计算起来会非常麻烦和复杂。
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They moved Eagle forward, away from a very rocky area that might have caused a difficult landing.
VOA: special.2009.07.15
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However, for dietary intake, there have been fewer advances like that because it's such a difficult thing to get a hold of.
然而,对于饮食摄入量,和那些比则进步要少,因为这很难把握
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But the published report says that would have forced it to fly in a difficult position.
VOA: special.2010.03.16
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If I can just have it there before me, that is a very difficult and derivative intellectual act, and it cannot be understood as primordial or primitive.
仅是面对着它，对于思维来说非常困难，并且这不能被理解为是原始的。
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Students often have to take a difficult test to gain entrance to a special school.
VOA: special.2011.02.13
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As you have no doubt experienced, this is a dense and difficult poem, so please reread it innumerable times for Wednesday's class, and in addition to that do the other readings assigned.
你们肯定也觉得了，这首诗很复杂很难懂，所以要一遍一遍的重复读，准备好周三的课，也要读布置的其他材料。
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Professor Yoshino explains. "Shakespeare calls this a problem of ocular proof, the idea that we need to see evidence before we believe in it -- and that,oftentimes, when metaphysical questions of guilt or innocence are difficult for us to answer, we have a tendency to reduce them to questions that pertain to physical evidence.
VOA: special.2011.06.06
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If we have a small engine, and we have to pull the car up a steep hill,a difficult hill, the engine is more likely to collapse,to blow up.
如果我们用的引擎很小，想把车开上一个陡峭崎岖的山坡，引擎很容易损毁，爆炸。
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This can make it difficult to find funding. Many entrepreneurs have to deal with a lot of initial rejection.
VOA: standard.2010.01.31
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And one reason Bowman believes this is that we have such a difficult time in understanding other peoples and other cultures is that the very idea of defending one's honor has largely been devalued in the modern west.
鲍曼给出了一个理由,正是因为西方社会中,对维护荣誉的观念早已淡化,才导致他们对其他社会群体,和特定文化的不理解。
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The Dutch have won all four of their World Cup matches so far, and Brazil coach Dunga describes them as a very difficult opponent.
VOA: standard.2010.07.01
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But it's difficult, because you have to go there like four or five times a week.
但是要坚持学习真实太难了，你一周得去四、五次。
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"You might take this as a general principle, that if you have revolutionary transformations, it's extremely difficult to go back to legal,legitimized, constitutional transfers of power that revolutionary settlements, in fact,are quite dangerous as a precedent.
VOA: standard.2009.09.01
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It is a little bit difficult in the sense that to have gotten into Princeton, one almost certainly has had to know something about something. Right?
之所以比较困难是因为,一个人如果想要进入普林斯顿大学，他一定,对某个领域有一定了解？
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"We have just come through what was one of the most difficult decades the middle class has ever faced a decade in which median income fell, and our economy lost about as many jobs as it gained,".
VOA: standard.2010.01.25
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For most people, that's a difficult concept and-- I think I may have mentioned some of this before, but let me give this history.
这个概念对大多数人来说有些难,我记得我之前提及过其中一些,但还是让我来讲述一下它的历史
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She says it's no easy feat. "You have to kind of deliver so much of the story through your own written texts so it's difficult in that way because you have to get a character and a point across in 140 characters or less."
VOA: standard.2010.05.07
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So we now have a situation that is much more difficult.
以至于现在的局势对于我们来说更加困难了。
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U.S.-Venezuelan relations since the populist Mr.Chavez was first elected in 1998 have been increasingly difficult, and he said in Moscow the new arms are to counter a U.S.-Colombian agreement last month under which U.S.forces will have access to several Colombian military bases.
VOA: standard.2009.09.15
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Imagine how much power it takes to drive an artificial heart, so you've got to have a battery or some way of generating power continuously to operate that and that makes it difficult to think about implantable and so that's a really good example of Biomedical Engineering.
驱动人工心脏所需要的能量是难以想像的,所以需要电池或者是某种持续发电装置,来给人工心脏提供能量,这就增加了人工心脏的植入难度,这是很好的生物医学工程的例子
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Ugandan Minister of Defense, Crispus Kiyonga, said the African Union force, composed of 2,590 Ugandan troops and 1,600 from Burundi, has so far been able to defend the transitional government's state house, Mogadishu port and airport, but said reinforcements to al-Shabaab have created a difficult situation.
VOA: standard.2009.06.26
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They are really a difficult concept to grasp when you have no base knowledge of it.
当你没有基础知识时，冠词确实很难掌握。
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who, you know, have a very strong, difficult-to-understand accent, then they would say that
他们有很重的、难以听懂的口音，然后他们会说，
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If it were all the things that it's not, or if it were identical to all the things that somehow or another it's not, then I would be in a very difficult situation because I wouldn't have any means of knowing it in particular.
如果一件事就是它自身的反面，或者和其他的事物没有区分之处,那么我们，就很难认识它,因为我们没有办法认识它。
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But before we dismiss Aristotle's account as insufferably inegalitarian and elitist, we have to ask a difficult question, not just of Aristotle, but more importantly of ourselves.
但在我们驳斥亚里士多德的论点之前,即令人无法忍受的不平等及精英者论点，我们必需要问一个艰难的问题，不只是关于亚里士多德，对我们更是重要。
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