The use of the fingers and hands to communicate and convey ideas, as in the manual alphabet used by hearing-impaired and speech-impaired people.是什么意思_The use of the fingers and hands to communicate and convey ideas, as in the manual alphabet used by hearing-impaired and speech-impaired people.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句