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

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發送短信 : Methods for modeling and verifying event-driven systems