This third important cleaning device - like breathing, under partial voluntary control - is a rapid muscle contraction and bronchial-tube constriction that generates a wind force far stronger than a tornado.

第三个重要的清洁装置 – 如呼吸，在半自主控制下 – 是一种快速的肌肉收缩和支气管收缩，产生的风力远强于龙卷风。