Using just these attributes, you can construct a simple program that animates changes to the width of a view, as in Listing 4.
通过使用这些属性，可以构造一个简单的程序，该程序以动画效果改变一个视图的宽度，如清单4所示。
This data wouldn't be viewable by normal file IO operations but could be accessed by any program using a special extended attributes API.
普通文件IO操作将看不到这个数据，但任何程序都可以使用一个特殊的扩展属性api来访问它。
Register the sequence number, interrupt nature, and thread attributes to the main program.
向主程序注册序号、中断属性和线程属性。
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