在物件内容中，定义两个所附加物件之间的关联性。
Defines a relationship between two attached objects in an object context.
在产品包装和附加物件上，应更加体贴、精美、实用和更高的附加值。
The product packaging and additional items, should be more considerate, attractive, practical and higher added value.
在产品包装和附加物件上，应更加体贴、精美、实用和更高的附加值。
The product packaging and additional items, should be more considerate, attractive, practical and higher added value.
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