此前的标签和属性可以是大写、小写，或者任意大小写字母的组合，而有效的XHTML 1.0文档则要求所有标签和属性必须一律小写。
Whereas previously tags and attributes could be written in uppercase, lowercase, or any combination thereof, a valid XHTML 1.0 document required all tags and attributes to be lowercase.
您可以使用mp3stego在适合原数据大小的mp 3文件中隐藏数据(顾名思义)。
You can use mp3stego to hide data (as the name implies) within mp3 files of a size proportional to the original data.
最后一个命令ext2online在系统运行时改变ext3文件系统的大小。
The last command, ext2online, resizes the ext3 file system on the fly while the system is running.
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