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单词
point group
释义
WordReference Random House Unabridged Dictionary of American English © 2024
point
′
group′,
[
Crystall.
]
Crystallography
a class of crystals determined by a combination of their symmetry elements, all crystals left unchanged by a given set of symmetry elements being placed in the same class. Also called
symmetry class.
1900–05
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更新时间:2026/1/12 4:12:46