發送短信 : Fuzzy Set Operations Based on the Theory of Falling Shadows

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