發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Clock synchronization by remote detection of correlated photon pairs