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铀钍-铅法定年
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铀钍-铅法定年
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uranium-thorium-1ead dating
铀钍-铅法定年
根据放射成因铅同位素与放射性铀或钍的比值测定地质和天体物质形成年代的方法。是铀-铅法和钍-铅法定年的统称。
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center of a conic
center of activity
center of a dynamical system
center of affinity
center of a graph
center of a group
center of a group algebra
center of a lattice
center of a Lie algebra
center of an algebra
center of a neighborhood
center of an ellipse
center of an ellipsoid
center of a quadric
center of area
center of a representation
center of a ring
center of a set
center of a sphere
center of attaction
center of buoyancy
center of circumcircle
center of curvature
center of dispersion
center of economic interest
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