A UCM component is simply a directory tree made up of files and directories that has one component root directory.

一个UCM构件简单来说，是一个由同一个构件根目录下的文件和目录组成的目录树。

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Imagine a scenario in which you want to traverse a directory tree recursively, stopping at each file and directory under that tree and having your own callback methods invoked for each entry found.

设想一个场景，您想要递归地访问一个目录树，在该树中的每个文件及目录上停下来，并为每个查找到的条目调用您自己的回调方法。

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There are a few other reports: One shows the average file size, another shows how the code is distributed over the directory tree, and another shows which files were revised the most.

还有其他一些报告：一个报告显示了平均文件大小，另外一个显示了如何通过目录树分布代码，还有一个则显示了哪个文件的版本改动最多。

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