a frosty morning的用法和样例：
- What a frosty morning!
- On a frosty morning with a little February sun, Clifford and Connie went for a walk across the park to the wood.That is, Clifford chuffed in his motor-chair, and Connie walked Beside him.
- This is the way we comb our hair on a cold and frosty morning.
- I hung out the washing to dry on a frosty day and when I went to take it in it was as stiff as a board.
- Her spirit? Moonlight on a frosty river.