“瓣膜”造句

心脏有瓣膜控制血液流进流出.
The heart has valves to let blood flow in and out of it.

二尖瓣狭窄的病变是在心肌而不是在瓣膜.
The abnormality mitral stenosis was in myocardium, not in the valve.

他们是那些最不适于作瓣膜切开术的患者.
They are patients in whom the valvulotomy was least adequate.

• #瓣膜