The contents of "Three element - rings" are the service contents, service targets and service approaches respectively.

组成“三元环”的三元素为服务内容、服务对象和服务手段。

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The contents of "Three element - rings" are the service contents, service targets and service approaches respectively.

组成“三元环”的三元素为服务内容、服务对象和服务手段。

youdao