Secondly, some large cities lack scale efficiency and have improper inputoutput ratio;

二是我国部分大城市缺乏规模效率，投入—产出比例失衡；

youdao

Secondly, some large cities lack scale efficiency and have improper inputoutput ratio;

二是我国部分大城市缺乏规模效率，投入—产出比例失衡；

youdao