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  ______    _____     ______    ______    _____   
 /_   _//  |  ___||  /_   _//  /_   _//  / ____|| 
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   `-`'    `-----`     `-`'    `-----`    `----`

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發送短信 : Terahertz conductivity of topological surface states in Bi1.5Sb0.5Te1.8Se1.2