Only purposeful human activity, only the existence of relations of production as the recovery of production and productivity.
只有在人类有目的的活动中，才存在着生产关系追随着生产方式和生产力的变化。
This course of realization involves the system of many elements of agricultural productivity and many sides of agricultural relations of production again.
这个实现过程又涉及农业生产力多要素和农业生产关系多侧面的体系。
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