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             ___      _____     ______   _    _   
  ____      / _ \\   |__  //   /_   _// | \  / || 
 |    \\   / //\ \\    / //     -| ||-  |  \/  || 
 | [] ||  |  ___  ||  / //__    _| ||_  | .  . || 
 |  __//  |_||  |_|| /_____||  /_____// |_|\/|_|| 
 |_|`-`   `-`   `-`  `-----`   `-----`  `-`  `-`  
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發送短信 : Multiple Representations in Chemical Education