Unit 4 单词 1. likely 2. concept 3. chart 4. focus 5. skip 6. fist 7. waist 8. nail 9. gallery 10. cyberspace 11. global 12. artificial 13. climate 14. flood 15. virtual 16. reality 17. virus 18. affect 19. rapidly 20. growth 21. pessimistic 22. ha...