Markedness theory is advanced by the Prague School and its key concept is marked-ness, which refers to a phenomenon of opposition and asymmetry.

标记理论是布拉格学派首先提出的，其核心是标记概念，它是指语言中的一种对立和不对称现象。

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Abstract: Since it originated with the Prague School, markedness theory has been an important theory in different sub-disciplines of linguistics, and has been applied to other research fields.

摘要：标记理论自布拉格学派创立以来，已成为语言学各分支学科的一项重要理论，并迅速运用到其它研究领域。

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Since it originated with the Prague School, markedness theory has been an important theory in different sub-disciplines of linguistics, and has been applied to other research fields.

标记论自布拉格学派创立以来，已成为言学各分支学科的一项要理论，并迅速运用到其它究领域。

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