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isotopic dating
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isotopic dating
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isotopic dating
同位素定年
根据岩矿、化石中放射性元素蜕变产物的含量计算而来的岩石生成距今年龄的方法。又称放射性碳定年法。
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isotopic dating
同位素纪年
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underwater topographic survey
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Underwood-Simmons Act
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undesired oscillation
undetectable
undetected neutron
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