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单词
cross-ratio
释义
WordReference Random House Unabridged Dictionary of American English © 2024
cross
′
ra
′
tio,
[
Geom.
]
Mathematics
a ratio relating four points in the real or complex plane. Also called
anharmonic ratio.
1880–85
cross
′
-ra
′
ti•o′
,
adj.
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更新时间:2025/11/19 13:55:34