clear air

例句：

1. 1. After the rain, the air is clear and refreshing.
   雨后，空气清新而令人振奋。
2. 2. The hikers were grateful for the clear air during their rest break.
   登山者在休息时感激清新的空气。
3. 3. The park was filled with clear air and the sound of birds singing.
   公园里充满了清新的空气和鸟儿的歌唱声。