發送短信 : Detect metal ions in water by using a fabry-perot interferometric fiber optical sensor.

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