a creation in the world的用法和样例：
- Medicated health-care products series for resisting senility are a creation in the world and a unique in China.
- He didn't have a care in the world.
- She is one of the best hurdlers in the world.
- The orient has been playing an active role in the world economy.
- Eurodollar is an important system creation in the world economy and the monetary history.