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2003年9月1日

1分鐘閱讀

生育率波動

美國出生率的波動難以給出明確的解釋

作者：羅傑·道爾

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Rodger Doyle can be reached at rdoyle2@adelphia.net

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This article was originally published with the title “Fertility Volatility” in 大眾科學 Magazine Vol. 289 No. 3 (September 2003)
doi:10.1038/scientificamerican092003-2HJEVeMeR5r0PsqmOCfvuQ

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