發送短信 : Learning in collaborative virtual environments.

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