a man of the world的用法和样例：
- He is a man of the world, very worldly.
- He began to feel that he was a man of the world.
- Are you a man of the world until you travel abroad?
- It is a pity that a man of your ability shall remain unknown to the world.
- He was a man of the world, and he knew a thing or two.
- He is too much of a man of the world not to know better.