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2013-05-23 12:21
求翻译：This phenomenon is due to populations’ charging from the bottom up — that is, younger age groups increase or decrease in numbers more rapidly and at an earlier date than do older age groups. Greater proportions of children lead to other problems, of course. Additional educational facilities are needed; there are fewer 是什么意思？ 待解决
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This phenomenon is due to populations’ charging from the bottom up — that is, younger age groups increase or decrease in numbers more rapidly and at an earlier date than do older age groups. Greater proportions of children lead to other problems, of course. Additional educational facilities are needed; there are fewer
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