發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Unemployment rate predicts anger in popular music lyrics: evidence from top 10 songs in the United States and Germany from 1980 to 2017