1. heart
2. mind
3. intention
4. center
5. core

classifiers: 顆, 個

1. texture
2. grain (of wood)
3. inner essence
4. intrinsic order
5. reason
6. logic
7. truth
8. science
9. natural science (esp. physics)
10. to manage
11. to pay attention to
12. to run (affairs)
13. to handle
14. to put in order
15. to tidy up