a period of transition的用法和样例：
- Childhood is a period of rapid growth.
- The capital cost is amortizable over a period of ten years.
- This was a period of transition for French painting in both styles and subject matter, from the "frivolity" of Rococo to the seriousness of Neo-classicism.
- The new government ushered in a period of prosperity.
- The lectureship is tenable for a period of three years.