a feather in your cap的用法和样例：
- They want you to photograph the President. That'll be quite a feather in your cap!
- In his new book, “Termites in the Trading System”, Jagdish Bhagwati of Columbia University points out that negotiators see any deal as a “feather in your cap”.
- Don't try to put feathers in your cap.
- Winning the medal was a feather in his cap.