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点读发声功能Point and read function翻译功能Translation function 音量调节功能Volume control functionMP3音乐播放功能Mp3 play function选曲功能Arias function选书功能Election of the function耳机收听、音箱播放功能Listening to headphones, speakers player自动关机功能Automaticclose-downfunction锂电池充电Lithium battery charging functionUSB下载、U盘功能Can be memory card