当我们编写基于sysfs信息的规则时，只是简单的匹配链条上一部分文件的属性内容。

When you write rules based on sysfs information, you are simply matching attribute contents of some files in one part of the chain. For example, I can read the size of my hard disk as follows.

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不过，如果正在覆盖某一部分文件，而此时系统崩溃，那么有可能所写的区将包含原始块和在其中散布了更新块的组合。

However, if part of a file is being overwritten and the system crashes, it's possible that the region being written will contain a combination of original blocks interspersed with updated blocks.

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当你以为应该要把它们安置在一个精确的位置时，一部分文件却可能由于你电脑的类型而需要更改时，所有的这些将变得非常复杂难解。

When you think that they all have to be put into exactly the right location, and some of those files might need to be changed depending on what type of computer you have, it all gets very complicated.

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So thankfully, modern operating systems allow you to put parts of files here, parts of your file here, parts of your file here, but the end result is that your files get fragmented.

因此，谢天谢地，现代操作系统允许你,把这里的文件进行分块，在这里存一部分，在那儿存一部分，但最后的结果是你的文件变成了分片的。

哈佛公开课 - 计算机科学课程节选

Some human rights documents say that there is a human right to pay vacation.

一些人权文件声称,带薪休假也是人权的一部分。

普林斯顿公开课 - 人性课程节选