During cruise flight,airliner cabin environmental conditions are different from those in a building.
巡航飞行时,旅客机座舱内相对湿度和空气密度都低于地面建筑物环境。
The airliner cabin air quality is related to the safety,health and comfort of passengers and cabin crew.
旅客机座舱空气质量关系到机组成员和乘客的安全、健康和舒适;座舱内空间狭小,人员密集,空气质量与地面建筑环境不同。