The alveolar ducts surrounded by many smaller and collapsed pulmonary alveolus.
许多肺泡常呈现萎陷的小囊，分布在肺泡管周围；
Alveoli form clusters (alveolar sacs) connected by alveolar ducts to the Bronchioles.
肺泡形成丛集的肺泡囊，经由肺泡管连接至支气管。
The alveoli collapse, and a "glassy" (hyaline) membrane develops in the alveolar ducts.
肺泡萎陷，同时肺泡管中出现“玻璃样”透明质膜。
There are great many alveolar ducts in the respiratory portion. Each respiratory bronchiole branched and formed many generous alveolar ducts.
肺呼吸部肺泡管的数量多，每支呼吸性细支气管分出多条肺泡管，肺泡管宽大；
There are great many alveolar ducts in the respiratory portion. Each respiratory bronchiole branched and formed many generous alveolar ducts.
肺呼吸部肺泡管的数量多，每支呼吸性细支气管分出多条肺泡管，肺泡管宽大；
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