Definition: the center of something or the most important part of something Level: B1
芝加哥位于中西部地区的中心。
Chicago is in ___the ___heart ___of the Midwest.
技术是现代教育的核心。
Technology is at ___the ___heart ___of modern education.
公园位于社区的中心，并且有一个游乐场。
The park is in ___the ___heart ___of the neighborhood, and it has a playground.
