Zussa C.Polesel E.Col U D.Galloni M;Valfre C;Frater R W M Seven-year experience with chordae replacement with expanded polytetrafluoroethylene in floppy mitral valve 1994是什么意思_Zussa C.Polesel E.Col U D.Galloni M;Valfre C;Frater R W M Seven-year experience with chordae replacement with expanded polytetrafluoroethylene in floppy mitral valve 1994在线翻译_英语_读音_用法_例句