About NO-REMAP in `where-is-internal'

[Xue Fuqiao]

In (info "(elisp) Scanning Keymaps"):

 -- Function: where-is-internal command &optional keymap firstonly
          noindirect no-remap
[...]
     The fifth argument, NO-REMAP, determines how this function treats
     command remappings (*note Remapping Commands::).  There are two
     cases of interest:

    If a command OTHER-COMMAND is remapped to COMMAND:
          If NO-REMAP is `nil', find the bindings for OTHER-COMMAND and
          treat them as though they are also bindings for COMMAND.  If
          NO-REMAP is non-`nil', include the vector `[remap
          OTHER-COMMAND]' in the list of possible key sequences,
          instead of finding those bindings.

    If COMMAND is remapped to OTHER-COMMAND:
          If NO-REMAP is `nil', return the bindings for OTHER-COMMAND
          rather than COMMAND.  If NO-REMAP is non-`nil', return the
          bindings for COMMAND, ignoring the fact that it is remapped.

I'm confused about the COMMAND and the OTHER-COMMAND.  What's the differences 
of them?

-- 
Best regards, Xue Fuqiao.
http://www.emacswiki.org/emacs/XueFuqiao