在那个研讨会上，他交了一篇，论文，是为其它一些场合写的，是关于关心这个概念。
At the symposium, he submitted a paper which he had written for some other occasion on the concept of caring about.
经过研讨后，Liz 和Richard起草了所要进行的概念论证内容。
After a workshop, Liz and Richard draft out the content of the proof of concept.
没错，这个概念现在还云里雾里的不很明确；并且如果您向本次研讨会的四位演讲者询问他们对Web 2.0的定义，您可能会得到六种不同的答案；但，这一概念确实也有实际的一面。
Yes, it's hype; and yes, if you asked four speakers at this conference how they defined Web 2.0, you got six different answers; but there's a lot of reality behind the hype.
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