Rule simplification and regularization:Rule simplification and regularization are a type of spontaneous morphological rule change that involves exceptional plural forms of nouns.

规则的简化与统一是一种涉及名词复数的特殊形式的自然的形态规则变化。

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It has a number of distinctive features in its phonological, morphological and syntactic systems which are rule-governed and systematic.

它在音系、形态和句法体系中也有许多甄别特征，而且这些特征也是系统的、由一定规则所制约的。

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Finally, a theoretical formula is established, which describes the rule and stability condition of the morphological evolution for a void under mechanical and thermal load.

最后，本文给出了基于机械和热荷载共同作用下描述孔洞形貌演化规律及稳定性条件的解析方法及数值模拟结果。

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