heart·land 
(härtlănd′)
(härtlănd′)n.
A central region, especially one that is politically, economically, or militarily vital to a nation, region, or culture.
| 单词 | heartland |
| 释义 | heart·land (härtlănd′)n. A central region, especially one that is politically, economically, or militarily vital to a nation, region, or culture. |
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