socioeconomic grade

例句：

1. 1.The socioeconomic grade of the city is considered to be among the highest in the country.
   该城市的社会经济等级被认为是该国最高的。
2. 2. The socioeconomic grade of the company has been steadily increasing over the past few years.
   该公司的社会经济等级在过去几年里稳步上升。
3. 3.The socioeconomic grade of the students has a significant impact on their academic performance.
   学生的社会和经济等级对他们的学业表现有重大影响。