Because of internal and external temperature difference is greater, sometimes, reach 15 celsius degrees more, when outside weather is scorching, Cou reason loose, as soon as but, entering , it is indoor, raid besides cold air in, is easy person.

• 由于内外温度差别较大，有时多达摄氏十五度以上，在外则天气炎热，腠理疏松，一但进入室内，寒气外袭，则易于中人。