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1996年2月1日

1分钟阅读

互联网上的购买凭证

作者：伊恩·斯图尔特

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More by Ian Stewart

This article was originally published with the title “Proof of Purchase on the Internet” in 大众科学 Magazine Vol. 274 No. 2 (February 1996), p. 124
doi:10.1038/scientificamerican0296-124

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