第三部分，文章详细分析了三大改造的历史必然性。
Third section, the article was detailedly analyzed three great reconstruction history necessity and was analyzed.
文章从三大改造的历史必然性和历史可行性两个角度进行了仔细的分析。
Feasible qualities of the great reconstruction of article through three history necessity and history two angles have been carried on the careful analysis.
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