a period of decline的用法和样例：
- Childhood is a period of rapid growth.
- SHL director of professional services Dr Ray Glennon said when businesses faced a period of decline, it was too easy to pick short-term solutions.
- The capital cost is amortizable over a period of ten years.
- The new government ushered in a period of prosperity.
- The lectureship is tenable for a period of three years.