历史上教育水平拥有如此预言般的魔力，其原因在于对教育投入的持续增长。
One reason that historical education levels have such predictive power is that educational investment is extremely persistent.
历史上教育水平拥有如此预言般的魔力，其原因在于对教育投入的持续增长。
One reason that historical education levels have such predictive power is that educational investment is extremely persistent.
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