设置里辅助功能TTY/TDD是什么意思? 英语
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【答案】 TTY mode allows deaf people to municate with family,friends,businesses and emergency services with the help of a TTY-patible phone and a patible device..A telemunications device for the deaf (TDD) is an electronic device for text munication via a telephone line,used when one or more of the parties has hearing or speech difficulties.