These modern architectural masterpieces are so many that this city almost feels like an open air museum.

这座城市的现代建筑杰作如此之多，感觉几乎就像一座露天博物馆。

He likes to cook in the open air.

他喜欢在外面做饭。

We sleep out under the stars, and eat our meals in the open air.

我们露宿在星空下，在户外用餐。

To take exercise in doors is less beneficial than in the open air.

在室内锻炼不如在室外锻炼更有益。

They again ate outside, for Clara had to be in the open air all day, if possible.

他们又在外面吃饭了，因为克拉拉如果她可以的话，一整天都会待在露天里。