demographic是什么意思

But efforts are in place to expose more black, Hispanic, and low-income students to advanced math, in the hope that the demographic pool of high-level contenders will eventually begin to shift and become less exclusive.

2017年6月六级真题（第三套）阅读 Section B

Transforming downtown areas so that they incorporate modem housing and improved walkability to local restaurants, retail, and entertainment—especially when combined with improved infrastructure for cyclists and public transit—makes them appeal to a more a

2017年12月六级真题（第一套）阅读 Section C

The idea is to force social scientists to integrate their work with other categories, including health and demographic change; food security; marine research and the bio-economy; clean, efficient energy; and inclusive, innovative and secure societies.

2013年考研真题（英语一）阅读理解 Section Ⅱ