The air then passes through the larynx and down the trachea .The trachea splits into two tubes, called the primary bronchi.One bronchus passes into each lung.是什么意思_The air then passes through the larynx and down the trachea .The trachea splits into two tubes, called the primary bronchi.One bronchus passes into each lung.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句