柯林斯詞典respiratory system 1. N the specialized organs, collectively, concerned with external respiration: in humans and other mammals it includes the trachea, bronchi, bronchioles, lungs, and diaphragm 呼吸系統(tǒng) 返回 respiratory system劍橋詞典the organs that make it possible for you to breathe 呼吸系統(tǒng) 返回 respiratory system