a warm overcoat的用法和样例：
- A warm overcoat would make him laugh at the worst winter winds.
- I'm dying for a warm overcoat on such a cold day.
- The girl who weeps in the corner is guilty of stealing, she just want to present her grandmother with a warm overcoat.
- He cumbered himself with an overcoat on a warm day.
- He walked out into the snow, heavily muffled up in a thick scarf and warm overcoat.