center 指三维空间的中心点，也可比喻抽象事物的中心。
middle 一般指时间、空间或过程两端间等距的部分。
heart 指事物最内部或最重要的部分，表地理位置时可与center换用。
core 指某事物固定的中心部分或最重要的核心部分。比喻意义指某物的精华。
midst 书面语用词，指在一个群体的深处或在某活动的进程中。
参考例句
1. You should heart what I said, or you will suffer for it. 你应该牢牢记住我说的话，不然的话你要吃苦头的。
2. I can see you in my heart. 我都可以在我的心底看到你。
3. If love is truth, then let it break my heart. 如果爱情是真相，那么就让它使我心碎吧！
英英解释
n.
1. the locus of feelings and intuitions
2. the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contraction
3. the courage to carry on
4. an area that is approximately central within some larger region
5. the choicest or most essential or most vital part of some idea or experience
6. an inclination or tendency of a certain kind
7. a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventi
8. a firm rather dry variety meat (usually beef or veal)
9. a positive feeling of liking
10. a playing card in the major suit that has one or more red hearts on it
