Grievance
发表于 2025-3-30 08:35:32
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fleeting
发表于 2025-3-30 13:11:27
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Ankylo-
发表于 2025-3-30 18:14:48
Gerald G. Krueger,Kristina P. Callisal changes implicit in what appear to be more or less permanent changes in the demographic behavior of citizens of industrialized nations. Paramount among these is the sustained levels of low fertility in all such nations (see Serow, 1981 for additional evidence of this) which, coupled with decrease