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单词 cardinal point
释义 cardinal point
noun
Etymology: cardinal (I)
1.
 a. : one of the four principal points of the compass north, south, east, and west
 b. in magical ritual : one of the four principal directional points of the compass or one of the additional points zenith, nadir, and center
2. of a lens or lens system : one of the two principal foci, the two principal points, or the two nodal points — called also Gauss point
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更新时间:2024/12/23 14:57:17