呼吸系统 hūxīxìtǒng respiratory system Definitions Defs Origin Strokes Stroke Words Sentences Sents 呼吸 hūxī verbnoun to breathe to inhale and exhale; to respire系统 系統 xìtǒng noun system A whole composed of parts that work together to perform a function or achieve a goal; a series or group of related things forming a complex whole.
