ups and downs的用法和样例：
- Her bosom rose and fell as she breathed.
- Their wages vary according to technical competence and output.
- There are a lot of ups and downs in life.
- The ship pitched and tossed in the rough seas.
- The company has undergone many ups and downs.
- The popularity of the film stars waxed and waned.
- Presidents ricochet between success and failure.
- The chances of success and failure are fifty-fifty.