發送短信 : Iterative learning from positive data and negative counterexamples

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