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单词 cross-ratio
释义 ˈcross-ˌratio Math.
[cross- 9.]
= anharmonic ratio.
1881Taylor Geom. Conics 249 An Anharmonic Ratio, or a Cross ratio of the four points.1882C. Smith Conic Sect. (1885) 53.
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更新时间:2024/11/5 18:28:31