A module declares the capabilities it provides to client modules and the capabilities it requires from other modules in terms of packages.

一个模块声明了它提供给客户端模块的功能，以及它需要从其他模块获得的有关包的功能。

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However, in an OSGi module, you can choose which packages are exported with the implicit fact that non-exported packages are not visible to other modules.

然而在OSGi模块中，你可以选择哪些包是exported(输出)的，这就意味着没有输出的包对其他模块是不可见的。

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For content in HTML that might not be well formed, LXML provides two useful packages: the lxml.html module and the BeautifulSoup parser.

对于不具备良好格式的html内容，lxml提供了两个有用的包：lxml . html模块和BeautifulSoup解析器。

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