發送短信 : SOME PHYSICAL STUDIES OF SUBSTITUTED ETHANES

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