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Wikiwand
6 天
展尾龍屬
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface. Wikiwand extension is a five stars, simple, with minimum ...
Wikiwand
4 天
Uniform 4-polytope
在四維空間中,七胞體為由7個多面體所組成的多胞體。四維空間中沒有正七胞體,但有半正七胞體(英语:Uniform_4-polytope),例如立方體錐體(英语:Cubic pyramid)、三角四角柱體柱(英语:3-4 duoprism)(或三角柱柱體)和雙三角錐體的四維錐體等。 四維超正方 ...
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