an act of breathing out the air or smoke that is in your lungs; an amount of air or smoke that you breathe out 呼出，吐出（肺中的空气、烟等）；呼气 Carbon dioxide is eliminated from the body during exhalation. 呼气期间会从体内清除二氧化碳。 Each exhalation was visible in the cold air. 每次呼气在冷空气中都可见。