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已有 2048 次阅读 2020-3-15 19:18 |个人分类:教育论坛|系统分类:科普集锦| 陈关荣, 圆周率π |文章来源:转载
3.14:神奇的 π 日背后的神奇数学
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陈关荣作品:
神奇的 π 日背后的神奇数学
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