. o O ( When you build Emacs from source, some of the Lisp files are loaded and the entire thing is "dumped" )
      ( -- therefore the executable has some Lisp files built-in.  You can override them by loading          )
      ( libraries, or by evaluating code, but you need to add this to your init file.  Alternatively, build  )
      ( Emacs again.  Does that help?                                                                        )
Thank you Alex. I got it now.
And I suppose cvs source should have a update.

CG
-- 
时间是一件奇妙东西，它可以掩盖一切。然而终有一天，一切都将为其所昭然。