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铀钍-铅法定年
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铀钍-铅法定年
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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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first order reaction
first order spatial coherence
first-order spatial coherence
first order spectrum
first-order spectrum
first-order system
first order temporal coherence
first-order temporal coherence
first order theory
first-order theory
first-order variation
first orthogonality relation
First Outline of a System of the Philosophy of Nature
first partial derivative
first passage
first-passage-time
first pass effect
first-person shooter
first phase
First Plenary Session of the Chinese People's Political Consultative Conference
first point of Aries
first point of aries
first point of Cancer
first point of Capricornus
first point of Libra
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