Echocardiography demonstrated a mass attached to the posterior left atrial wall protruding into the mitral orifice during diastole.是什么意思_Echocardiography demonstrated a mass attached to the posterior left atrial wall protruding into the mitral orifice during diastole.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句