In history the phenomenon of exploitation is the premise that exploitative class on basis of private ownership exists and exploitative class essentially opposeagainst 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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Finally, we could rotate two overlapping flat space dimensions further against each other, until they oppose each other's time progress and space dimensions.