Imagine a programming world where you could never actually persist XML to a file!
试问，编程领域若永远都不能将XML持久化存储到文件中会是怎样一番情境？
In the Windows world, a file can have multiple sets of data associated with it.
在Windows世界中，文件可以拥有多个与之相关的数据集。
Prepare an input file hello.txt containing "hello world!" first.
首先准备一个输入文件hello. txt，其中包含“helloworld ！”
This file is the only part of your application exposed to the outside world.
此文件是应用程序公开给外界的惟一部分。
Since the hello world example only has a single page, this file is empty here.
因为hello world示例只有一个简单的页面，因此该文档是空的。
Since the hello world example only has a single page, this file is empty here.
因为hello world示例只有一个简单的页面，因此该文档是空的。
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