您可以执行多个函数，如添加自定义代码或调用关系映射。
You can perform several functions, such as add custom code or invoke relationship mapping.
有时处理是微妙的，如添加一些本来没有的事物到相片上。
Sometimes the manipulation is subtle, like adding something to a photo that wasn’t originally there.
您可以设想更复杂的联系人模式，如添加多个电话号码、地址等。
You could imagine a much more complicated schema for contacts, with things like multiple phone Numbers, addresses, etc.
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