Electrophysiologic studies were carried out in patients with LVEF lower than 40%, with about 30% of patients in each group.是什么意思_Electrophysiologic studies were carried out in patients with LVEF lower than 40%, with about 30% of patients in each group.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句