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U-Th/He dating
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第四纪年代学
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U-Th/He dating
铀-钍/氦定年
应用U、Th发生α衰变,最终生成Pb和4He的原理,测定矿物年龄的同位素测年方法。
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Nubeculae
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Nubian Civilization
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nucellar cell
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nuclear
nuclear accident
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nuclear [adiabatic] demagnetization
nuclear adiabatic demagnetization
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