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始祖马
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始祖马
Encyclopedia
理学
哺乳纲(化石)
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始祖马
最早的马科动物,同时也是最早的奇蹄动物。
随便看
pole of a point group
pole of a polar plane
pole of a polar system
pole of a quadratic differential
pole of a quadric hypersurface
pole of a quadric surface
pole of a Riemannian manifold
pole of a rolling curve
pole of a sphere
pole of a system
pole of a system of coordinates
pole of figure
pole of first order
pole of orbit
pole of order n
pole of projection
pole of rotation
pole of the ecliptic
pole of the equator
pole of the hyperplane
pole-on
pole on a ball
pole-on object
pole-on star
pole orbit
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