Objective To explore clinical observation of effect of bronchoalveolar lavage(BL)with bronchofibroscope in refractory lower respiratory tract infection.是什么意思_Objective To explore clinical observation of effect of bronchoalveolar lavage(BL)with bronchofibroscope in refractory lower respiratory tract infection.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句