發送短信 : What are the "four roots of capacity and nature"?

  _  _      ___      ____      _____             
 | \| ||   / _ \\   |  _ \\   |  ___||   ____    
 |  ' ||  / //\ \\  | |_| ||  | ||__    |    \\  
 | .  || |  ___  || | .  //   | ||__    | [] ||  
 |_|\_|| |_||  |_|| |_|\_\\   |_____||  |  __//  
 `-` -`  `-`   `-`  `-` --`   `-----`   |_|`-`   
                                        `-`