在肺部，布满粘液的支气管像树一样又分为成千上万个更小的管(细支气管)，他们连接到叫做肺泡的小囊。
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.
许多肺泡常呈现萎陷的小囊，分布在肺泡管周围；
The alveolar ducts surrounded by many smaller and collapsed pulmonary alveolus.
应用推荐