我们出去呼吸点新鲜空气吧。

Let's go outside and get some ___fresh ___air.

我喜欢在乡村散步，享受新鲜空气。

I love walking in the countryside to enjoy the ___fresh ___air.

打开窗户，让新鲜空气进来。

Open the window to let in some ___fresh ___air.