發送短信 : Classification of pH Levels using a mobile phone

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