你可以只为单一用户订阅，也可以给多个用户订阅。

A subscription can be for a single individual user or multi-user.

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这个数据可以来自用户也可以来自数据库。

That data could come from the user or from a database.

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用户描述也可以使用一个分层架构。

User stories can have a hierarchy as well.

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Or would be better that more information and more expression was available but to a smaller audience which is probably the relevant audience for any person?

我们也可以选择将,更多的信息以及状态,仅对与用户有联系的,少部分人开放？

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选