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

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發送短信 : Mathematics Embedded in Culture: The Weaves of Batak Basketry