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年龄中位数
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年龄中位数
Encyclopedia
法学
年龄
释
median age
年龄中位数
将全体人口按年龄大小的自然顺序排列时居于中间位置的人的年龄数值。又称中位年龄、中数年龄。
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fluorination
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fluorine-18
fluorine compound
Fluorine Dating of Fossil Bones
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