Modern play theories in Western art mainly involve the theory of freedom, the theory of harmony, the theory of mimicry, the theory of merging and the theory of internal purpose.

近代以来的西方游戏理论主要有自由论、和谐论、虚拟论、融合论及内在目的论五种。

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The theory of freedom, particularly Marx's, is one of the important contents of philosophy thought. Although people are familiar with it, they really come short of far the degree they know.

自由理论，尤其是马克思的自由理论，是哲学思想的重要内容之一，人们对其虽熟知，但远未达到真知的程度。

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On the question of freedom in education there are at present three main schools of thought, deriving partly from differences as to ends and partly from differences in psychological theory.

关于教育自由的问题，目前主要有三大思想派别，其差异部分在于目的，部分在于心理学观念。

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In many ways Aristotle there offers, as does Plato, a certain kind of critique of the modern or even the ancient democratic theory of freedom, which is living as one likes.

亚里士多德在很多方面所提出的和柏拉图相似，都是一种对现代,或甚至古代自由民主理论的评判，也就是过一个人想过的生活。

耶鲁公开课 - 政治哲学导论课程节选

The peace plan, in theory, is now being rolled out, with pledges of social justice, greater press freedom and political reform.

ECONOMIST: And finding that, in Thailand, they no longer fit together