英语翻译The historian Frederick J.Turner wrote in the 1890’s that the agrarian discontent that had been developing steadily in the United States since about 1870 had been precipitated by the closing of the internal frontier- that is ,depletion of depletion of available new land needed for further expansion of the American farming system.
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英语翻译
The historian Frederick J.Turner wrote in the 1890’s that the agrarian discontent that had been developing steadily in the United States since about 1870 had been precipitated by the closing of the internal frontier- that is ,depletion of depletion of available new land needed for further expansion of the American farming system.
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