In a society, basic concepts of value should be the union of ideal and reality.

一个社会的基本价值取向应该是理想与现实的统一，是既可欲又可行的。

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And their union is the Ideal of Reason.

完成它们两者统一，就是理性的理想。

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As far as the ultimate objective that man pursue is concerned, "the union between man and heaven" and "Parato Optimal" are just the ideal conditions.

就人类追求的终极目标而言，不论是“天人合一”还是帕累托最优，都是一种理想境界。

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In an ideal world for union organizers, where the external forces of global economy have no impact on union membership, this may not be true.

FORBES: Yes, Unions Need Reinventing

Hence the need for an avant-garde to keep the ideal of ever closer union alive.

ECONOMIST: Charlemagne

Beauvoir and Sartre helped to popularise a modern ideal of a male-female union of the minds.

ECONOMIST: French muses