addition law of probability的用法和样例：
- Law of probability indicated that we would have to adopt one of them.
- We are subject to the law of the land.
- Who discovered the Law of Gravitation?
- Poker is a simple game where the laws of probability are cleanly defined.Real life is a lot messier.
- Expressions of degree of belief were used in language long before people began codifying the laws of probability theory.