The bronchioles , meanwhile , come courtesy of the lush vegetation , turning the island into a real set of ' green lungs ' .
同时，毛细支气管由茂密的植被构成，岛屿变成了真正的“绿肺”。
Within the lungs , the mucus-lined bronchi split like the branches of a tree into tens of thousands of ever smaller tubes ( bronchioles ) , which connect to tiny sacs called alveoli .
