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  ______     ___      _____      ___              
 /_____//   / _ \\   |__  //    / _ \\    ____    
 `____ `   | / \ ||    / //    / //\ \\  |    \\  
 /___//    | \_/ ||   / //__  |  ___  || | [] ||  
 `__ `      \___//   /_____|| |_||  |_|| |  __//  
 /_//       `---`    `-----`  `-`   `-`  |_|`-`   
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發送短信 : The role of virtual communities in promoting Electronic Commerce.