age of maturity的用法和样例：
- The age of maturity is a time of serious reflection.
- Being a man has always been dangerous.There are about 105 males born for every 100 females, but this ratio drops to near balance at the age of maturity, and among 70-year-olds there are twice as many women as men.
- The average age of the boys in this class is fifteen.
- I don't think he looks his age of seventy.
- The age of majority is eighteen.
- He ran away from home at the age of thirteen.