發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : A functionally arranged phononic crystal rod enabling ultra-wideband vibration attenuation and orderly frequency distillation