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 __   __   __   __   ______     _____             
 \ \\/ //  \ \\/ // |      \\  |  ___||   ____    
  \   //    \ ` //  |  --  //  | ||__    |    \\  
  / . \\     | ||   |  --  \\  | ||__    | [] ||  
 /_//\_\\    |_||   |______//  |_____||  |  __//  
 `-`  --`    `-`'   `------`   `-----`   |_|`-`   
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發送短信 : Information theoretical analysis of unfair rating attacks under subjectivity