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作者：温迪·M·格罗斯曼

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我同意我的信息将按照《大众科学》和施普林格·自然有限公司的隐私政策进行处理。

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Wendy M. Grossman, a frequent contributor on information technology, is based in London.

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This article was originally published with the title “Access Denied” in 大众科学 Magazine Vol. 279 No. 2 (August 1998), p. 38
doi:10.1038/scientificamerican0898-38

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