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

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發送短信 : Energy and material flows of megacities