Even for a city you cannot predict any drastic population change 10 years ahead
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送交者: Amsel 于 2009-08-26, 18:00:53:
回答: "——人口数量是渐变而不是突变"? for a city, this is not necessary the case. 由 steven 于 2009-08-26, 17:46:59:
as long as you cannot predict wars and economy changes.
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