由于两个原因，我喜欢对名称空间使用别名：首先，如果以后要改变名称空间，在每个源代码文件中只有一行需要修改。
The use of aliases is my preferred method for using namespaces for two reasons: First, if I later rename the namespace, I only have one line of code to change per source file.
清单12是使用我们的text1文件的基础例子，它包含3个行，每行只有两个单词。
Listing 12 is a basic example using our text1 file, which contains three lines each having two words..
只有同时属于这两个组的用户才允许读和写此文件。
Only users who are members of both groups will be granted read, write to the file.
XMLNamespaces规定前缀是无关紧要的，因此只有名称空间前缀不同的两个文件应视作同一文件。
XML Namespaces stipulates that prefixes are inconsequential, and so two files that vary only in choice of namespace prefixes should be treated as the same.
只有两个论据支持以文件系统模型来实现应用软件，一是软件已经以这种方式设计和实现；二是用户已经习惯于这样。
Only two arguments can be mounted in favor of application software implemented in the file system model: Our software is already designed and built that way, and users are used to it.
只有两个论据支持以文件系统模型来实现应用软件，一是软件已经以这种方式设计和实现；二是用户已经习惯于这样。
Only two arguments can be mounted in favor of application software implemented in the file system model: Our software is already designed and built that way, and users are used to it.
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