發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : RANDOMNESS EXTRACTION AND CLOCK SYNCHRONIZATION WITH CONTINUOUS PARAMETRIC DOWN-CONVERSION