车辆平均到达率在一个周期内稳定不变；的翻译：Vehicle average arrival rate unchanged at a stable cycle; 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Average arrival rate of vehicles in a single cycle unchanged;

Vehicle average arrival rate unchanged at a stable cycle;

The vehicles arrive equally rate in a cycle stable invariable;

Average vehicle arrived at rates remain stable within one cycle;

Vehicle average arrival rate unchanged at a stable cycle;