List the four design models required for a complete specification of a software design and the role of each.的翻译：List the four design models required for a complete specification of a software design and the role of each. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

列出一个完整的软件设计和每个角色规范所需的四个设计模型。

List the four design models required for a complete specification of a software design and the role of each.

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List the four design models required for a complete specification of a software design and the role of each.