breathing valve

• 呼吸瓣

breathing valve的用法和样例：

例句

1. Here is a congenital bicuspid aortic valve.
   这是一个先天性的两瓣叶主动脉瓣。
2. How many cusps are there supposed to be on this pulmonic valve.
   你认为这个肺动脉瓣有多少个瓣叶？