bioprosthetic valve造句

例句与造句

1. Background : we reviewed the patients who un der went tricuspid valve replacement ( tvr ) to compare the long - term clinical results of bioprosthetic valve with mechanical valve in tricuspid position
   背景：对接受过三尖瓣置换术( tvr )的患者进行回顾，比较生物瓣膜和机械瓣膜的远期临床效果。
2. It's difficult to find bioprosthetic valve in a sentence. 用bioprosthetic valve造句挺难的