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

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發送短信 : Optimal arrangement of meta-atoms composing metamaterials