虐耳万词-走-grad it（3星难度；20个单词）

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本期合计20个单词（3星难度；建议收听5遍；下方配以记忆体系彩图）

1. upgrade=up+grad+e

2. downgrade=down+grad+e

3. degrade=de+grad+e

4. degradation=de+grad+ation

5. retrograde=retro+grad+e

6. retrogradation=retro+grad+ation

7. graduate=grad+u+ate

8. graduation=grad+u+ation

9. undergraduate=under+grad+u+ate

10. postgraduate=post+grad+u+ate

11. exit=ex+it

12. initiate=in+it+i+ate

13. initiation=in+it+i+ation

14. initiative=in+it+i+ative

15. initial=in+it+ial

16. sedition=sed+it+ion

17. seditionary=sed+it+ion+ary

18. transit=trans+it

19. transition=trans+it+ion

20. transitory=trans+it+ory