心脏瓣膜

change of heart───改变心意，改变看法

have a heart───v.发慈悲

give sb heart───同情某人

have a heart!───v.发慈悲

have the heart───有勇气做某事；对于某事可以忍受

take to heart───认真关注；对…耿耿于怀

valve gear───阀动机构

Kawasaki disease can also cause inflammation of the heart muscle (myocarditis) and leakiness of heart valves, but these problems are almost always temporary.───川崎氏症也可以引起心肌炎症和心瓣膜关闭不全，但这些问题几乎是一过性的。

In the field of cardiac surgery, valve replacement is an effective approach to treat valve disorders, however, all of heart valves can be used clinically have different degrees of impairment.───在心脏外科领域中，人工心脏瓣膜置换术是治疗心脏瓣膜性病变的主要外科治疗手段，然而，临床上可以使用的人工心脏瓣膜存在不同程度的缺陷。