a rational man的用法和样例：
- I'm a rational man, I can't accept such ridiculous thing!
- There were a couple of trunks indeed, such as a rational man might need.
- Do you know who defined man as a rational animal?
- The Fuhrer therefore had to think and speak coolly and deliberately, as a rational man and primarily as a soldier, as the leader of the German and allied armies.
- The rational man fears the judgement of God.