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