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单词 crystallographic axis
释义 crystallographic axis
[¦kris·tǝ·lō¦graf·ik `ak·sǝs]
CRYSTALLOGRAPHY
One of three lines (sometimes four, in the case of a hexagonal crystal), passing through a common point, that are chosen to have definite relation to the symmetry properties of a crystal, and are used as a reference in describing crystal symmetry and structure.
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