第二，我们应该经常打开窗户，以保持房间空气新鲜。
Second, we should often open the windows in order to keep the air in the room fresh.
在晚上，打开窗户或者用风扇让空气保持对流，让凉快的晚风能够穿过房子。
In the evening, open windows and use fans to create a cross-breeze, circulating cooler evening/night air through the rooms.
更重要的是，我们在家的时候，我们应该打开窗户以保持空气清洁。
What's more, when we are at home, we should open the Windows to keep the air clean.
居室要经常通风，这样才能保持人的健康和愉悦，家具也一样。每天早上打开窗户通风，给家具换换气。
Home to the regular ventilation so as to keep people healthy and happy furniture. Every morning to open the window ventilation to give the furniture for air.
对我们自己而言，我们能做到的就是经常洗手，打开窗户，保持家里新鲜空气。
For ourselves, all we could to do is to often and regular wash hands, open Windows keep fresh air in our home.
房间必须打开窗户保持通气。
房间必须打开窗户保持通气。
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