blue skies
clear skies
cloudless skies
stormy skies
A: Look at the beautiful blue skies today!
A：看今天这蓝天多美啊！
B: Yes, it is perfect weather for a picnic.
B：是的，这天气太适合野餐了。
1) 天空或大气层
2) 文学中的苍穹
3) 各种天气状态下的天空
1. 天空；苍穹
noun
1. The region of the atmosphere or the expanse of space seen from the earth.
Synonym: heavens, firmament