Why would anyone make their work more difficult than it already is?
工作已经很难了，为什么有人会让自己的工作比现在更困难呢？
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？
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。
Why do you make things so difficult for yourself?
你为什么这样跟自己过不去？
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。
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？
Why is modeling for execution so difficult?
为什么为执行而建模是如此困难？
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？
Knowing this can help explain why changing habits can be so difficult.
知道这一点，可以帮助我们解释为什么改变旧习惯这样困难。
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？
Why is this such a difficult concept?
这个概念难在哪里？
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？
This is why the ‘is’ seems so difficult.
这就是为什么我们容易编造自己却又似乎是那么难。
Why is it difficult to get rid of an addiction?
为什么很难戒掉上瘾的东西呢？
Such life stories help explain why reconciliation is difficult.
这样的人生故事正好解释了要想达成和解很困难的原因。
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？
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？
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