可恨的阴霾来了又去，又回来了，来了又去，又去了……。
The hateful haze comes and goes, comes and goes, goes and goes again...
传说的烟雾将再次回来！
Legend has it that the weekend smoke will come back again!
许多人认为雾霾中的室内空气会比室外空气好得多。 只要门窗是关闭的，什么都不会。
Many people think that indoor air in haze is much better than outdoor air. As long as the doors and windows are closed, nothing will happen.
但这是真的吗？
But is that true?
建筑科学研究院建筑环境与研究所的近年发表了有关雾天室内外污染相互关系的研究。 研究指出，对于没有任何净化措施的室内环境，室内外PM2.5浓度具有显着的相关性。 当室外PM2.5浓度超过300μg/ m3时，建筑室内的PM2.5浓度也超过210μg/ m3。 也就是说，在严重污染的情况下，没有任何空气净化装置的室内可以达到室外污染的约70％。
Experts from the Institute of Building Environment and Energy Conservation of the Chinese Academy of Architectural Sciences have published studies on the relationship between indoor and outdoor pollution in foggy days in recent years. The study points out that PM2.5 concentration is significantly correlated with indoor and outdoor environment without any purification measures. When the outdoor PM2.5 concentration exceeds 300 ug/m3, the indoor PM2.5 concentration also exceeds 210 ug/m3. That is to say, in the case of serious pollution, the indoor air pollution without any air purification device can reach about 70% of the outdoor pollution.
您不敢采取措施关闭门窗并躺在家里吗？ 采取行动改善室内空气质量！
Don't you dare take measures to close doors and windows and lie at home? Take action to improve indoor air quality!
在这里，康格给了三个朋友一个把戏：
Here, Kang gave three friends a trick:
，防止污染空气进入：雾气和天气应保持门窗关闭，以减少空气污染物从外部进入室内的渗透率，并降低室内PM2.5的浓度。
First of all, to prevent polluted air from entering: fog and weather should keep doors and windows closed to reduce the permeability of air pollutants from the outside into the room, and reduce indoor PM2.5 concentration.
二，室内空气净化：选择的格力威康空气净化器，有效降低室内灰尘和PM2.5浓度。
2. Indoor air purification: Select professional Greenwick air purifier to effectively reduce indoor dust and PM2.5 concentration.
第三，烟雾消失，窗户通风：当室外空气中的烟雾消失时，应尽可能打开窗户，以使室内空气中的细小颗粒尽快散开
Third, smoke disappears and windows are ventilated: when smoke in outdoor air disappears, windows should be opened as far as possible so that fine particles in indoor air can disperse as soon as possible.
