开窗通风是改善室内空气质量的最简单有效的方法。不少人认为,下雨天空气清新,开窗通风效果好。不过,下雨天开窗通风也需要把握好时机,以免适得其反。下雨之前,往往伴有大风,容易扰动窗台、树木上积累的灰尘,此时最好先关闭窗户,以免把室外的污染 Window ventilation is the simplest and most effective way to improve indoor air quality. Many people think that the rainy day, fresh air, window ventilation and good effect. However, the rainy day window ventilation also need to grasp the opportunity to avoid the opposite. Before it rains, it is often accompanied by strong winds, which can easily disturb the accumulation of dust on windowsills and trees. At this time, it is a good idea to close the windows first so as not to pollute the outdoors