Bleeding may be herralded by several day of exacerbation of pain.数天的疼痛加剧可能为出血的先兆.Nonetheless, none of these pathogens is associated with severity of asthma exacerbation.然而, 这些病原体与哮喘恶化的程度无关.His foolishness was followed by...

exacerbation的音标：...

n.恶化，激怒，增剧，转剧...