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| |  | ||  \ \\/ //     ___    /_   _// | || | || 
| |/\| ||   \ ` //     /   ||   -| ||-  | || | || 
|  /\  ||    | ||     | [] ||   _| ||_  | \\_/ || 
|_// \_||    |_||      \__ ||  /_____//  \____//  
`-`   `-`    `-`'       -|_||  `-----`    `---`   
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發送短信 : Spin Currents in a Coherent Exciton Gas