發送短信 : Excess Repair Time for a Repairable System

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