delinquency ratio

例句：

1. 1. The school's statistics show a significant increase in the delinquency ratio among teenagers.
   学校的统计数据显示，青少年的失范比率显著增加。
2. 2. The researcher found that the juvenile delinquency rate had doubled in the last five years.
   研究人员发现，过去五年中，青少年犯罪率翻了一番。
3. 3. The city government has launched a campaign to reduce the delinquency ratio, aiming to improve public safety.
   市政府已经启动了一个运动，旨在降低失范比率，以改善公共安全。