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1. acid, acri, acrid, acu=sour, sharp, 尖，酸，锐利 acid acidulous acute acrimonious
2. act=to do, to drive, 行动，做 actate enact react
3. aer, aero, aeri=air, 空气，充气 aerate aerial aerosphere
4. ag=do, act, 做，代理做 agile agent agitate
5. agri, agro, agr=field, land, 田地，农业 agriculture agrarian agrobiology
6.alter, altern,ali=other, to change, 其他的，改变状态 alterable alteration alternative
7.am, amor, amat=love, 爱，情爱 amiable amicable amity
8.ambul=walk, 行走，走路 ambulance ambulant
9.anim=life, spirit, 生命，精神 animate magnanimous unanimous equanimity
10. ann, enn=year, 年，一年 annual anniversary annuity perennial
11. anthrop=man, human, 人，人类 anthropology philanthropist
12.apt, ept=fit, ability, 适应，能力 aptitude adaptable adaptation adept
13.aqu=water, 水 aquatic subaquesous
14.arch, archy=ruler, rule, chief, 统治者，统治，主要的 anarchy patriarch architecture archipelago(群岛)
15.art=skill, joint, trick, 技巧，关节，诡计 artifact artificial artisan ariticle
16.astro, aster=star, 星星 disaster astrology
17.audi, audit=hear, 听 audibible auditorium audition audience
18.av, avar, avi=desire, bird, 渴望，鸟 aviation avid aviator
19.ball, bol=throw, dance, ball, 抛，舞，球 balloon ballad
20.bas, base=low, foundation, 低下，基础 baseless debase abase
21.bell, bel=war, fight, 战争，打斗 rebel belligerent bellicose rebellion
22.bio, bi=life, 生命，生物 biology autobiography biosphere symbiotic
23.brev, bridg=short, 短，缩短 abbreviate brevity brief
24.cad, cas, cid=fall, 落下，降临 casualty occasion decaent coincide incident occident
25.cand=white, glow, 白，发光 candid candor candidate incandescent
26.cant, cent=sing, song, 唱歌 cant recant(取消) accent accentuate
27.cap, capt, cept, ceive, cip, cup=take, hold, seize, 拿，抓，握住
captive capture accept receptacle conceive deceive perceive conceit
anticipate emancipate participant preoccupation occupant
28.cap, cipit=head, 头 capacity captain capitulate precipitate
29.card, cord=heart, 心脏，一致 cordial concord discord accord cardinal
30.carn=flesh, 肉，肉欲 carnal carnival carnivorous
31.ced, ceed, cess=go, 行走，前进 accede antecedent intercede recede excessive succeed access successive recession
32.celer=quick, speed, 快，速 celerity accelerate decelerate
33.cent=hundred, 一百 centimeter percent percentage
34.centr=center, 中心 concentrate centripetal concentric
35.cern, cert, cret=sure, separate, 搞清，区别 concern discern discernmible ascertain certificate discrete discreet
36.chron=time, 时间 chroic chronicle anachronism synchronize synchronous
37.cid, cis=cut, kill, 切开，杀 decide homicide insecticide suicide concise
38.circ, cycl=ring, circle, 圆，环 circular circulate circuitous encircle bicycle recycle
39.cit=quote, call, 引用，唤起 excite incite recite
40.claim, clam=cry out, shout, 呼喊，叫喊 acclaim declaim disclaim exclaim reclaim clamor