经济人的经济利益圆周范围不断扩大以至相互重叠，是合作行为产生的客观经济基础；
The objective economic base of the cooperation behavior is economic man's economical benefit circumference scope unceasingly expands down to mutually overlaps.
经济人的经济利益圆周范围不断扩大以至相互重叠，是合作行为产生的客观经济基础；
The objective economic base of the cooperation behavior is economic man's economical benefit circumference scope unceasingly expands down to mutually overlaps.
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