The English language is made up of the grammar and vocabulary which people from many different countries brought to Britain and that is why English has so many difficult rules that confuse people.
来自不同国家的人们把词汇和语法带入英国，形成了英语，这就是为什么英语有那么多让人困惑的规则的原因。
I want you guys to think about why it was difficult to do it another way, which is more pedestrian.
我希望你们能思考一下为什么用另一种更普遍的方法来做比较困难。
But if improving their hunting luck was the chief motivation for the paintings, it is difficult to explain why only a few show signs of having been speared.
但是，如果增强他们的狩猎运气是这些画的主要动机，那么就很难解释为什么只有少量画作有被长矛刺过的迹象。
Why is it so difficult to take that first step?
为什么迈出第一步如此困难？
But working out how to do that is difficult, which is why deforestation got left out of Kyoto.
但是，如何处理这件事是非常困难的，这就是为什么砍伐树木没有进入《京都议定书》。
So again I ask myself, why is it so difficult to install one of these seats?
所以我再一次问自己，为什么安装一个座椅如此困难？
They didn't know why, but then again, the middle of the globe is perhaps the most difficult place to gather data on Earth.
斯利普说，他们不知道原因，但是地球的中心仍是我们这个星球最难获得数据的地方。
I don't know why, but I just long Ed to stand by his side. Grandpa is hard of hearing as well as our communication problem which made it difficult for us to understand each other.
我几乎每天跟着外公，我也不知为什么，我就想跟在他的身边，本来外公就听不清楚，再加上语言障碍，我们很难交流。
We lose self-discipline. After all, why would we work on something that is arduous and difficult when we could be watching TV?
总之，为什么我们要在可以看电视的时候去做一些艰辛困难的事情呢？
Why is it difficult for a self-teaching language learner to keep his zeal through to the end?
外语自学者为何往往难以把学习“冲劲”保持到底？
Subsequent chapters explain why so many individuals find it so difficult to forgive, and why holding onto grievances is really a decision to suffer.
随后的一张解释了为什么有很多个体发现要你宽恕一个人真的很难，为什么会有没办法原谅他人的理由，为什么抱怨回事痛苦的来源。
That is perhaps why sculpture has been described as the most difficult of all arts; certainly it is more difficult than the arts which involve appreciation of flat forms, shape in only two dimensions.
雕塑被说成是所有艺术中最难的艺术，可能就是这个道理。欣赏雕塑品当然比欣赏平面的艺术品要难。
It is difficult to support Unicode, and the chapter on that topic explains why.
要支持Unicode是相对困难的，本章解释了难点所在。
Decisions like these are very personal and difficult to make, which is why they must be respected and not commented on.
像这些完全是个人决定并且是很难作出的，这也是为什么我们必须尊重并不要妄加评论。
Basically, your body USES these hormones to help you stay at your weight and keep you from losing fat - which is another reason why dieting can be so difficult.
从根本上说，你的身体利用这些激素帮助你保持现在的体重，不让你的脂肪流走——这是节食如此之难的另外一个原因。
A: this is also what we feel difficult to understand. So I suggest you ask officials of the South Korean Embassy why they did this.
答：这也正是中方感到难以理解的地方，所以我建议你去问韩国驻华使馆的官员，他们为什么这样做。
It is still not known why the control mechanism breaks down in some people, but the results are very difficult to treat.
但我们还是不知道，在某些人群中这样的控制机理失效的原因，只知道这样的疾病极难治疗。
Typography is one of the most difficult trends to tackle which is why it will remain fresh in 2010.
设计字体是最难的设计风格之一，这就是为什么设计字体仍然是2010年的潮流趋势。
Hard evidence for the importance of sadness in humans is difficult to come by, but there are lots of ideas about why our propensity to feel sad might have evolved.
悲伤对于人类是很重要的，虽然对此很难找出确凿的证据。但是，关于我们为什么会倾向于感受悲伤，很多看法正在演进。
To grasp why it is so difficult for IT firms to stay on top, picture the computer industry as a never-ending enterprise to create digital “platforms”, both large and small.
为了理解为什么IT公司极难保持领先，我们可以把电脑工业想象成一个永无止境的行业，一直在创造有大有小的数字“平台”。
At night, it's the extra-sensitive rods that take over — this is why it's difficult to detect color in low levels of light.
夜间，特别敏感的视杆细胞在眼睛视物占有主导地位—这就是为什么在昏暗的光线条件下我们很难看到事物的色彩。
Making it happen is what counts, and this is the difficult bit - which is why so many seemingly clever schemes fail.
重要的是让想法付诸实施，而这很困难——这正是那么多看似更聪明的计划落空的原因所在。
"It is difficult to know why this relationship occurs - for example, stress, genes - so more work needs to be conducted on the exact mechanism underlying it," he said.
“很难理解为什么会发生这样的联系——也许是压力，基因——所以目前尚有大量的工作需要处理以找出准确的深层机制，”他认为。
The point is that the cacophony of analysis helps to explain why policymakers react in different ways to the same crisis and why it is so difficult for them to come up with co-ordinated action.
关键在于，分析上不和谐的声音，有助于解释政策制定者在同一场危机中，为何采取了不同的对策，以及他们达成协同行动为何如此困难。
The brain is resistant to arousal during deep sleep, which explains why it's difficult to wake a sleepwalker.
深度睡眠时大脑对外界的激励有抵抗力，这解释了为什么很难叫醒梦游者。
However, it is difficult to understand why this information cannot be made available weeks or even months later.
然而，为什么这一信息不能在几周甚至几个月之后公布于众，这点很难令人理解。
Given that, why is it difficult to attract interest in research in an area such as tuberculosis, even though it causes a large burden of disease across the world?
既然是这样，为何还很难使人们重视结核这类领域的研究工作，即使它在全世界造成了巨大的疾病负担？
Given that, why is it difficult to attract interest in research in an area such as tuberculosis, even though it causes a large burden of disease across the world?
既然是这样，为何还很难使人们重视结核这类领域的研究工作，即使它在全世界造成了巨大的疾病负担？
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