Application of pulmonary infection control window as switching point for sequential invasive to noninvasive ventilation in treatment of severe respiratory failure of chronic obstructive pulmonary disease: a randomized controlled study是什么意思_Application of pulmonary infection control window as switching point for sequential invasive to noninvasive ventilation in treatment of severe respiratory failure of chronic obstructive pulmonary disease: a randomized controlled study在线翻译_英语_读音_用法_例句