heartland
noun [ C, often plural ] uk/ˈhɑːt.lænd/ us/ˈhɑːrt.lænd/
（国家或地区的）腹地
the central part of a country or area
the heartland of America 美国腹地
中心地区，重要地区
the part of a country that is most important for a particular activity, or where a political party has the most support
the old industrial heartlands 旧时的工业重地
UK the Labour/Tory heartlands 工党／保守党的领地