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单词
symmetry element
释义
WordReference Random House Unabridged Dictionary of American English © 2024
sym
′
metry el′ement,
[
Crystall.
]
Crystallography
any of four points, lines, or planes of a crystal: a center of symmetry, a reflection plane, a rotation axis, or a rotation-inversion axis.
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更新时间:2025/10/11 15:25:35