發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Orientation conjugation of reflecting prism rotation and second-order approximation of image rotation