DF
abbr. 系主任(Dean of the Faculty);测向器(direction finder)
例句
Df reports file system disk usage.
df显示文件系统的磁盘使用情况。
This can be gotten with the df command.
可以使用 df 命令获得。
And now I have a relation between df and dt.
现在得到了df和dt的关系。