这个目录中的其他文件可以由根用户写，可以通过它们修改一些 cpufreq 设置。
The rest of the files in this directory are writable by root and give the user the ability to change some cpufreq settings.
w：用户对有写权限。
我可以在该目录中添加和删除文件，因为已经设置了它的用户写位。
I can add and remove files from the directory, because its user-write bit is set.
应用推荐