In history the phenomenon of exploitation is the premise that exploitative class on basis of private ownership exists and exploitative class essentially oppose against exploited one.

历史上存在的剥削现象都是以私有制基础上的剥削阶级的存在和剥削阶级与被剥削阶级的根本对立为前提的。

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These include private entrepreneurs, a class once regarded as exploitative and banned from party membership.

ECONOMIST: China's leadership struggle | The