a discerning man的用法和样例：
- A discerning man keeps wisdom in view, but a fool's eyes wander to the ends of the earth.
- Flog a mocker, and the simple will learn prudence; rebuke a discerning man, and he will gain knowledge.
- You've got quite a discerning eye.
- And now let Pharaoh look for a discerning and wise man and put him in charge of the land of Egypt.