Preliminary study of real-time three-dimensional echocardiographic planimetry of the mitral valve area before and after percutaneous balloon mitral valvuloplasty是什么意思_Preliminary study of real-time three-dimensional echocardiographic planimetry of the mitral valve area before and after percutaneous balloon mitral valvuloplasty在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句