可是，也有一些忧虑是出自一些使用数字9999标记文件结束的数字系统。

But there were also worries because some data systems used the digits 9999 to mark the end of a file.

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——写入 node 属性描述的一个节点的内容（XML 文件中开始和结束标记之间的文本）。

writes the content (the text between the start and end tag in an XML file) for the one node described by its node attribute.

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在文本编辑器中打开日志文件，在每个文件的开头添加惟一的标记，在末尾添加相应的结束标记。

Open the log file in a text editor, and add a unique tag to the very beginning of the file and a corresponding closing tag at the end of the file.

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