求翻译：虚拟企业是一种新的企业组织形式，其结构主要有，星形模型、链状模型和网状模型。在虚拟企业层面，涉及的建模元素为成员企业，定义为：是什么意思？

The virtual enterprise is a new form of business organization, its structure, the star model, the chain model and mesh model. Modeling elements involved in the virtual enterprise level, as a member enterprises, defined as:

Virtual Enterprise is a new type of business organization, its structure, there are star model, a chain model and mesh model. In the Virtual enterprise level, which involves the modeling elements as a member organization, defined as the following:

The hypothesized enterprise is one kind of new enterprise organizes the form, its structure mainly has, star type model, chaining model and network model.In the hypothesized enterprise stratification plane, the modelling element which involves is the member enterprise, the definition is:

Is a new virtual enterprise organization, its structure, Star model, the chain model and the network model. In the virtual enterprise level, involves modeling element as a member of enterprise, defined as:

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