發送短信

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

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發送短信 : A comparative study of the vocabulary in primary school Chinese textbooks in the perspective of distribution, usage & level of difficulty