The juvenile justice system has evolved over the years based on

The juvenile justice system has evolved over the years based on the premise that juveniles are different from adults and juveniles who commit criminal acts generally should be treated differently from adults.
【正确答案】：青少年法律系统在过去几年有了变化，因为考虑到青少年与成年人不同，所以对青少年犯罪的惩罚也应与成人不同。