Across
- 5. obvious
- 7. make or construct
- 10. remember
- 12. control
- 13. cooperate，teamwork
- 14. enforce
- 15. more and more
- 18. resident
- 21. leave
- 23. only
Down
- 1. changes in an irregular way
- 2. percentage
- 3. suggest
- 4. suffer，experience
- 6. monitor
- 8. separately
- 9. influenced by a virus
- 11. like a particular thing very much
- 16. replace
- 17. in charge of library
- 19. reduce
- 20. protect or save something
- 21. throw sth
- 22. promote