在没有建立统一的形式化描述方法之前，很难判定哪种理解是正确的。

It is hard to judge which one is correct before establishment of uniform formal descriptive method.

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文章从形式化定义和设计过程描述这两个方面研究了特征设计的形式化描述方法。

This paper makes attempt to establish a domain-independent description formalism for feature-based design from two aspects: formalized definition and design process description.

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从三个方面研究了基于特征设计的形式化描述方法：基于特征设计的基本定义、设计过程模型及设计算法。

This paper aims to establish a domain independent representation formalism for feature based design in three aspects: formal representation, design process model and design algorithm.

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