self-documenting

• Described as " the extensible , customizable , self - documenting real - time display editor , " emacs can run in tty or character mode - for example in a telnet or xterm session - or in a graphical user interface on just about any unix platform
  Emacs被描述成“可扩展的、可定制的、自身可编制文档（ self - documenting ）的实时显示编辑器” ，可以在tty或字符方式下运行emacs ?例如，在telnet或xterm会话中