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 /_   _//   / _ \\   /_____//  \ \\/ //  /  ___|| 
 `-| |,-   | / \ ||  `____ `    \ ` //  | // __   
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   `-`'     `---`    /_//        `-`'     `---`   
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發送短信 : Amplification of evanescent waves in a lossy left-handed material slab