The National Parks in England are called "England's Breathing Spaces" because they are places where people can go to be in the openair, away from the dirt and noise of cities.
英国的国家公园被称为“英国的呼吸空间”，因为在那里人们可以远离城市的尘土和噪音，享受户外的空气。
2
He likes to cook in the openair.
他喜欢在外面做饭。
《牛津词典》
3
To take exercise in doors is less beneficial than in the openair.