Different from legitimate knowledge given by traditional school education, the construction of educational knowledge based on network is bottom-up.

与传统学校教育所传授的“法定知识”不同，网络环境下的教育知识往往是自下而上建构的。

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The challenge we face is how do we re-legitimate ourselves as a source of foundational knowledge.

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Scott advises applicants to check out Dockwalk -- a sailing crew community site, where people can share their experiences and draw on collective knowledge to establish if a captain is legitimate.

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In an email, Dr. Glassman said he had no knowledge of it but added that the Medtronic royalties were "for legitimate contributions to the development of" a Medtronic device used to treat scoliosis and other conditions.

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