本文给出了一个大纲的知识基础版本和一些最近提出的关于命题知识基础版本的复杂性。

This paper gives an outline of knowledge base revision and some recently presented complexity results about propositional knowledge base revision.

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还有，不管你做什么，别理他们提供的托管服务，那个很烂——空间很小，且一旦从基础版本升级，就要花很多钱，记得会员费大概每月要30美金。

Also, whatever you do, don't bother with their hosting. It's crap, because the space you get is very limited and once you upgrade from the basic plan it becomes very expensive.

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WebSphere Portal Enable 和 WebSphere Portal Extend 在基础版本上添加了一些其他功能，如 Web 内容和文档管理、 工作流、即时消息和电子 表格。

WebSphere Portal Enable and WebSphere Portal Extend add additional functionality to the base edition, such as Web content and document management, workflow, instant messaging, and electronic forms.

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