A Study on Pathogenic Bacteria of the Infection of Inferior Respiratory Tract of Elderly Patients with COPD and the Bacterial Drug Resistance是什么意思_A Study on Pathogenic Bacteria of the Infection of Inferior Respiratory Tract of Elderly Patients with COPD and the Bacterial Drug Resistance在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句