Why is so difficult to IDC market, why many people feel that nine out of ten business IDC is cheater?

为什么现在IDC市场那么难做，为什么很多人感觉IDC商十个有九个是骗子？

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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。

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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？

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A newly released history of 20th Century Russia, written by a team of 45 scholars and edited by historian Andrei Zubov, includes a statement that much of the country's recent past is painfully difficult to study, which is why many refuse to do so.

VOA: standard.2009.12.25

Why is it difficult in some cases to produce a vaccine when we've been successful in so many others?

为什么某些疾病的疫苗很难研制,即使我们已经成功生产了很多种疫苗

耶鲁公开课 - 生物医学工程探索课程节选

Now the question is "how does it expand" and "why is it so difficult for us to understand, accept, assimilate and live according to the fact that we can make a difference, if we understand that what we need to understand is how change happens.

问题是“它如何扩大“,以及为什么我们难以理解，我们能够做出改变这个事实,并接受，被同化以及据此生活，如果我们能了解我们需要理解的,是改变如何发生。

哈佛公开课 - 幸福课课程节选

That is why it is so difficult to study and why the studies show mixed results.

FORBES: Does NIH recommend acupuncture?

This is why it is so difficult to pigeon hole him into one political description.

FORBES: Is President Obama Truly A Socialist?

This is part of the reason why bitcoin is so difficult to counterfeit.

FORBES: Bitcoin: Whatever It Is, It's Not Money!