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1991年8月1日

1分钟阅读

到底什么是数字日晷？

作者：伊恩·斯图尔特

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This article was originally published with the title “What in Heaven is a Digital Sundial?” in 大众科学 Magazine Vol. 265 No. 2 (August 1991), p. 104
doi:10.1038/scientificamerican0891-104

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