This is an example of - sign language, Visually impaired persons use - braille, Some visually impaired persons use this - red tipped white cane, This was designed for people who are hearing impaired - sign language alphabet, Louis Braille developed the - braille alphabet,

Special forms of communication

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排行榜

快閃記憶體卡是一個開放式範本。它不會為排行榜生成分數。

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