In any products, including currency, free trading is ideal, but with one condition: that no egoistic people manipulate it against the true and fair market mechanism.
任何商品，包括通货，自由贸易是一种理想状态，但有一个前提，即没有自私的人操纵它，打击真正公平的市场机制。
Whitman gave himself to the world and made the bold, massively egoistic assumption that the gift measured up.
惠特曼把自己奉献给世人，并且大胆地、毫不谦逊地臆断：他的礼物是合格的。
The utility function model of friendship index expounds the prerequisite and degree of altruistic, egoistic, harm and ride-free behavior that they conform to economic law.
行为的敌友指数效用函数模型，在个体水平上说明了利他、利己、损人和搭便车行为发生的条件和程度，指出它们都是符合经济学规律的。
The utility function model of friendship index expounds the prerequisite and degree of altruistic, egoistic, harm and ride-free behavior that they conform to economic law.
行为的敌友指数效用函数模型，在个体水平上说明了利他、利己、损人和搭便车行为发生的条件和程度，指出它们都是符合经济学规律的。
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