1. factor=element=ingredient=constituent=part=component
2. rarely=uncommon=unusual=hardly=seldom
3. fatal=deadly=dangerous=risky=hazardous=hazard=peril=perilous= precarious=unsound=unsafe=critical
4. link=connect=associate=relate=join
link=connection=association=relationship
A bears little or no relationship with B.
5. desperate=despair= in dire need of
6. cold=freezing=frozen=icy=polar region=South Pole=temperature(-40℃)
7. depend on=rely on
    decide =determine
8. priority 优先权 prior to=before
9. exposure=not covered=be trapped in= be caught in
ex-wife, ex-president, ex-soldier
external---internal        exterior---interior        export---import
exit----entrance          extract                excavate
10. qualify→qualification  purify  simplify  signify  identify
11. cover---coverage
12. vary=change=shift=variation=modify=revise
=adjust=transform=convert=alter=improve
13. prevent=inhibit=discourage=stop=obstacle=barrier
=obstruction=impediment=impede
=hinder=block
14. encourage=promote=facilitate=help=boost
15. expensive=costly=high-priced=pricy=pricey
16. disagree=ideas differ/vary radically,
=no consensus/agreement
17. growth= increase=go up= rise=boom=jump=leap
=climb=skyrocket=soar =explosion
18. worthwhile=worthy=beneficial
19. objective comment=unbiased statement
20. additional information=supplementary data
=complement
21. deficiency=lack=scarcity=shortage=insufficiency
=inadequacy
  adequacy=sufficiency=abundant=substantial=enough
  adequate=sufficient
  Inadequate=insufficient
22. fundamental=basic=essential=elementary
23. restricted=limited=finite=exhaustible=narrow=restrain
24. discipline=subject=course
25. autonomous=independent=self-determining
26. obligatory=compulsory=required
27. indispensable=essential=necessary=prerequisite
28. consistently=always
29. guarantee=ensure
30. preservation=conservation=protection
conservative
31. pollution =contamination
pollutant =contaminant
waste =garbage=rubbish=trash=junk=stuff which has been thrown away
connect和join的区别32. breed=generate=produce=engender
33. subject(人)=participant=those surveyed=sample
34. exceptional=wonderful=excellent
35. domain=field=area
36. Initially=originally=at first=earliest
37. demanding= difficult
38. complexity=sophisticated=complex
=far from being simple
39. appreciate=understand
40. apparent=obvious=evident=distinct=marked=clear
41. rudimentary=basic=elementary=underdeveloped
42. initiative adj.创始的, 初步的, 自发的 n.首创精神, 主动权, 第一步
initiate=originate=start=launch
initially=originally=firstly=at first
43. reluctant=unwilling=loath=involuntary
44. exclusively专门地, 排他地, 独占地
exclude  exclusion  exclusive
include    inclusion  inclusive
45. alternative  adj. 两者择一的, 供选择的, 非主流的
            n. 替换物, 取舍
46. therapy=treatment=remedy
47. chronic=long-term
48. erode=corrode=scour    erosion
49. maintenance  maintain
50. accessible  adj.可得到的, 易接近的, 可进入的, 易受影响的, 易理解的
51. relieve=ease=alleviate=lighten
52. context=background
53. Stimulate  stimulus
54. dramatic=noticeable=remarkable=marked=phenomenal=significant=considerable
55. dwelling    dwell    dweller
residence  reside    resident
inhabitance  inhabit    inhabitant
56. Conventional=traditional=old=established
57. Sustain=vt.支持, 承受, 维持, 认可, 经受
58. Facility  facilitate
59. Demographic  demography
60. Ambitious=ambition=with great goals
61. Financial=fund=funded support=budget
62. Flexibility  flexible  反义词fixed
63. Stress=pressure=strain=tension    stressful=nervous=strained
64. Interrupt  interruption
65. Commerce=business =trade
66. Approach=method=way=means
67. Differentiate=distinguish=identify

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