It is well understood that differences are the raw ingredients for learning at the group level.

从讨论组的层面来看，差异是促进学习的原材料之一。

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It doesn't really matter how this is achieved. What matters is that the content is well-understood and visitors feel comfortable with the way they interact with the system.

这个是否达到了，实际上并不重要，重要的是内容是否被很好地理解了，而用户是否觉得他们与这个系统的交互非常舒服。

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Poverty is not relative, and it cannot be objectively determined by an expert. Adam Smith understood that very well.

亚当·斯密早就告诉过我们，贫困并不是相对的，也不能由某个专家做出客观的评断。

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But in East Timor it is well understood that the army is the problem, not the answer, and the agreement was greeted with scepticism.

ECONOMIST: East Timor

After a concerted effort by entrepreneurs, investors, academics and ordinary people to educate lawmakers, it is now well understood in Washington that talented immigrants are job makers, not job takers.

FORBES: The Time Is Now To Fix Rules On High-Skilled Immigration

Addiction is a disease that is relatively well understood, even if it is still difficult to treat.

CNN: When celebrities share secrets, good things happen