a clear sky的用法和样例：
- The news was like a thunderbolt out of a clear sky.
- His visit came out of a clear sky.
- He thought he was alone but suddenly out of a clear sky there were Indians all around him.
- I know, the tomorrow is a clear sky, you would be very brilliant.
- Smoke from the camp-fires spiraled up into a clear sky.
a clear sky的相关资料：