- 问题详情:Brazilhasbecomeoneofthedevelopingworld'sgreatsuccessesatreducingpopulationgrowthbutmorebyaccidentthandesign.WhilecountriessuchasIndiahavemadejointeffortstoreducebirthrates,Brazilhadbetterresultswithoutreallytrying,saysGeorgeMartineatHarvard.Br...
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