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单词 dipyramid
释义 di·pyramid
\(ˈ)dī+\ noun
Etymology: di- + pyramid
: a crystal consisting of two pyramids base to base, the one geometrically a mirror image of the other with respect to the horizontal plane of symmetry
 < dipyramids occur in the tetragonal, hexagonal, and orthorhombic systems and may have corresponding orthorhombic, tetragonal, ditetragonal, hexagonal, or dihexagonal symmetry >
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更新时间:2025/3/12 21:03:44