 As a watershed for the branches of AI, some classification standards and methods are discussed: 1) AI R D should be human-oriented , machine-oriented, and biological-oriented   ;
<coherence>  As a watershed for the branches of AI, some classification standards and methods are discussed: 1) AI R D should be human-oriented , machine-oriented, and biological-oriented   ;
 As a watershed for the branches of AI, some classification standards and methods are discussed: 1) AI R Human-oriented , machine-oriented, and biological-oriented ;