Constrained by the morphological rules, the agent of these verbs is suppressed, leaving the position empty for the external argument.

受形态规则制约，这些动词的施事被压制，外部题元为空。

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Based on the distribution features of terms with different length, some morphological rules of term structure are concluded by machine learning methods.

针对不同长度术语的分布特性，结合机器学习方法从多角度提炼出术语结构的词法特征。

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This paper proposes a syllabification algorithm based on constraint tree, in which morphological rules constraint, metrical rules constraint and phonotactic rules constraint are imposed.

在实施音位规则约束时，我们提出了一种基于音位结构树的子算法。

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