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bipyramid(dipyramid)
基礎(chǔ)科學(xué)

        Definition: An n-gonal bipyramid or dipyramid is a polyhedron formed by joining an ngonal pyramid and its mirror image base-to-base. The referenced n-gon in the name of thebipyramids is not an external face but an internal one,existing on the primary symm......(本文共 736 字)     [閱讀本文] >>

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