A cold is an infection of the upper respiratory tract.感冒是上呼吸道的感染。Sleeping on one's side with the head raised may help those affected with upper airway resistance syndrome.侧睡并将头部抬高对那些患有上呼吸道阻力综合征的人有所帮助。He had an infection in the upper respiratory tract.他上呼吸道感染。