上呼吸道感染 shànghūxīdàogǎnrǎn upper respiratory tract infection Origin Definitions Defs Strokes Stroke Words Sentences Sents 上呼吸道 shànghūxīdào upper respiratory tract The upper part of the respiratory system, which includes the nasal cavity, pharynx, larynx, and trachea.感染 gǎnrǎn noun infection the process or state of being infected by a pathogen