详细解释:n. 心脏地区, 中心地带
英语解释：
名词 heartland:
the central region of a country or continent; especially a region that is important to a country or to a culture详细解释：
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