Why is the obesity problem in Britain so difficult to solve?
为什么英国的肥胖问题如此难以解决？
I can understand why astronauts find it difficult to readjust to life on earth.
我能明白为什么宇航员们发现难以重新适应地球上的生活。
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。
According to the passage, why is it difficult for foreigners to learn Chinese?
根据文章，为什么外国人学习汉语很难？
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。
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。
Why is it so difficult to take that first step?
为什么迈出第一步如此困难？
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？
In the current Labour market, it isn't too difficult to understand why a worker would do this.
在当今的劳动力市场上，并不难理解为什么很多人选择零报酬工作的做法。
In the bunker, where ice crystals have formed on the ceiling in perfect geometric squares, it quickly becomes apparent why it's so difficult to build on permafrost.
在地坑里，冰晶在天花上结成了完美的几何块状。我很快就明白了为什么在永久冻土带上建筑房屋很困难。
That's why marketing is so difficult to learn.
这就是为什么学习行销这么难。
Why are habits so difficult to change?
为什么习惯这么难以改变？
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。
Why is it difficult to get rid of an addiction?
为什么很难戒掉上瘾的东西呢？
Why is it so difficult to fall asleep when you are overtired?
为何你劳累过度却又如此难以入睡？
Question: Why does it seem difficult to make a breakthrough at the Six-Party Talks?
记者问：六方会谈为何难以取得突破？
It is not difficult to understand why the White House has chosen this tack.
不难理解白宫为什么这么做。
What makes them laugh and cry, why are they temperamental, why are they so difficult to get along with, what do they really want?
是什么让他们欢笑和哭泣，为什么他们喜怒无常，为什么他们这么难相处，他们到底想要什么？
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？
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。
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。
But why is it so difficult to make suburbs more efficient?
但为什么公共交通在郊区很难发挥作用呢？
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。
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。
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