基于语义的方式，有两大基本原理，如这一标准所介绍。
The two fundamental principles of the semantics-based approach, introduced by the standard, are.
第二章提出了基于符号的产品信息建模基本原理和方法。
Chapter two presents the basic principle and method of product information modeling based on symbol.
该算法基于流图理论的基本原理和简单的集合运算，概念明确，易于掌握；
The algorithm is based on the principle of flow graph theory and set theory.
该算法基于流图理论的基本原理和简单的集合运算，概念明确，易于掌握；
The algorithm is based on the principle of flow graph theory and set theory.
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