發送短信 : Development and design of a learning management system

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