The company was too busy dealing with several brushfires of PR crises to focus on new projects.

brushfires 是复合名词，由 brush（灌木丛）和 fires（火灾）组成，字面意思是"灌木丛火灾"。在比喻用法中，指"突然爆发的小规模危机或冲突"，强调其突发性和需要立即处理的特点。这里用来形容突然出现的公关危机。