heartland

名词 heartland:

1. the central region of a country or continent; especially a region that is important to a country or to a culture

heart.land

n.（名词）
A central region, especially one that is politically, economically, or militarily vital to a nation.
核心地带：尤指对一个国家的政治、经济或军事有重要作用的中心地区