accumulated income是什么意思

用法例句

According to the present situations that accident occurrence rate is so high in Lanxiao section of National Highway 312, through the investigation and statical analysis of the accident data in history, the distinguishing method,the corresponding accident accumulation frequency curve has been put forward in the paper.

针对312国道蓝小公路事故多发的现状,通过对事故历史资料的调查和统计分析,提出了项目级(即一条道路)事故多发路段鉴别方法——当量事故累计频率曲线法。