once upon a time = adv.从前Once upon a time,there were six blind men in a village in India.从前,在印度的一个村子里有六个瞎子.

one = num.一pron.一个(只)

(表示代替可数的东西)

One day in May, she met a young man.五月里的某一天,她遇见一位年轻人.

one after another = adv.接连地We will deal with the questions one after another.我们会一个接一个地对付这些问题.

one another = n.彼此,相互We have to help one another now.我们现在不得不互相帮助了.

one day = adv.有一天,总有一天A friend of his came to visit him one day.他的一位朋友有一天来看他.

onerous = a.繁重的;费力的[oner=load,表示"负担"]

oneself = pron.[反身代词]自己;亲自,本人He is beside himself with joy.他欢喜得发狂.

onion = n.洋葱In my opinion, only the onion can grow in the iron environment.据我看,只有洋葱能在铁质环境中生长.

only = ad.仅仅,只不过a.唯一的conj.可是,不过In my opinion, only the onion can grow in the iron environment.据我看,只有洋葱能在铁质环境中生长.

only that = 要不是…

only too = adv极,非常,太,很We are only too pleased to work together with the workers.我们同工人们在一起劳动,太高兴了.

onto = prep.在...上面;到...上面The married man carried the scarred car and carriage onto the carrier.已婚男子把有疤痕的汽车和马车带到了航母上.

onus = n.负担,责任(on[=owner]+us表示名词,如:nodus节,结节,难点)

[oner=load,表示"负担"]

onymous = a.有名字的(onym+ous)

[onym=nam,表示"名字"]

opaque = a.不透明(光)

的;难理解的,晦涩的At the neck of the wrecked deck, the reckoner checked the opaque cheque.在遭破坏的甲板的颈部,计算者检查了这张不透明支票.不透明的(op不+aque水→不像水一样→不透明的)

[aqu=water,表示"水"]

oparotitis = oparotitis n 腮腺炎(par旁边+ot+it is炎症=耳朵旁边的炎症=腮腺炎)

ot(o)

=ear,表示”耳朵” otophone n 助听器(oto+phone声音=[帮助]耳朵听声音=助听器)

otology n 耳科学(oto+ology学科)

otopathy n 耳病(oto+pathy病)

otitis n 耳炎(ot+it is炎病)

oparotitis n 腮腺炎(par旁边+ot+it is炎症=耳朵旁边的炎症=腮腺炎)

opeate = opeate v 操作,开动(oper+ate=工作起来)

oper=work,表示”工作” opera n 歌剧(通过创作而来)

operatta n 小歌剧(oper工作,歌剧+etta小)

opeate v 操作,开动(oper+ate=工作起来)

operation n 操作,手术(operate+ion)

cooperate v 合作(co共同+oper+ate=共同工作)

cooperation n 合作(cooperate+ion)

operose a 费力的,用功的(oper+ose多…的=多工作的=费力的)

operable a 能做手术的(oper 工作=手术+able=能手术的)

open = n.公开,户外a.开的,开放的v.开With one penny I had this peculiar pen opened.我花了一便士让人把这支奇特的钢笔打开了.

open out = v.展开,开发,展现,揭示,直言The future opens out a bright prospect for us all.未来向我们大家展示光明的前途.

opening = n.开,开放,开始,空缺,机会a.开始的,开幕的We revved up rehearsals for the opening of the play.我们为戏剧的开演更加紧排演.

opera = n.歌剧The rational operator started a new era of opera cooperation in AD 2000.理性的操作者在公元2000年开创了一个歌剧合作的新时代.n.歌剧(通过创作而来)

[oper=work,表示"工作"]

operable = a.能做手术的(oper工作→手术+able→能手术的)

[oper=work,表示"工作"]

operate = v.操作,运转,开动,起作用,动手术The machine is not operating properly.机器运转得不正常.

operation = n.运转,开动,操作,手术,运算,经营Mr.Jones is very ill and needs an operation.琼斯先生病得很厉害,需要做手术.n.操作;手术(operate+ion)

[oper=work,表示"工作"]

operation on = 做..的手术

operational = a.操作的,运转的,起作用的,经营的The language laboratory is not operational yet.语言实习教室还不能使用.

operator = n.操作人员,(电话)

接线员The rational operator started a new era of opera cooperation in AD 2000.理性的操作者在公元2000年开创了一个歌剧合作的新时代.

operatta = operatta n 小歌剧(oper工作,歌剧+etta小)

oper=work,表示”工作” opera n 歌剧(通过创作而来)

operatta n 小歌剧(oper工作,歌剧+etta小)

opeate v 操作,开动(oper+ate=工作起来)

operation n 操作,手术(operate+ion)

cooperate v 合作(co共同+oper+ate=共同工作)

cooperation n 合作(cooperate+ion)

operose a 费力的,用功的(oper+ose多…的=多工作的=费力的)

operable a 能做手术的(oper 工作=手术+able=能手术的)

operose = a.费力的;用功的(oper+ose多…的→多工作的→费力的)

[oper=work,表示"工作"]a.费力的(oper劳动)

[-ose表形容词,"多…的"]

opinion = n.意见,看法,主张In my opinion, only the onion can grow in the iron environment.据我看,只有洋葱能在铁质环境中生长.

opponent = n.对手,反对者,敌手a.对立的,对抗的Suppose you were exposed in the opposite position by your opponent, …假设你被对手暴露在相反的位置,….v.对立的n.对手(op反+pon+ent→反着放→对立的)

[pon,pound=put,表示"放置"]

opportunism = n.机会主义(opportune时机的,机会的)

[-ism①表示"各种主义,宗教"②表示"学术或学术流派"③表示"行为,现象,状态"④表示"疾病"⑤表示"具备某种牲质"]

opportunity = n.机会After a fortnight's torture, the unfortunate man got an opportunity to escape the misfortune.经过两星期的拷打后那个不幸的人得到了逃脱不幸的机会.

oppose = v.反对,使对立,使对抗,使相对The colored students held a one-week moratorium on classes to oppose racism.黑人学生举行罢课一周反对种族歧视.

opposite = a.对面的,相对的,相反的n.对立面Suppose you were exposed in the opposite position by your opponent, …假设你被对手暴露在相反的位置,….a.相对的(op对+pos+ite→放到对面→相对的)

[pos,posit=put,表示"放"]

oppress = oppress v 压迫,虐待(op加强动作+press=拼命压=压迫)

press= press, 表示”挤压” pressing a 急迫的(press+ing)

pressure n 压力(press+ure)

compress v 压缩,缩短(com全部+press=全部压到一起)

compressible a 可压缩的(com+press+ible)

compression n 压缩,紧缩(com+press+ion)

depress v 压下,使沮丧(de向下+press=向下压=使情绪低下)

depressed a 感到压抑的(depress+ed)

depression n 沮丧,萧条(depress+ion)

express v 表达,特快(ex把[思想]挤出来=表达)

expression n 表达,表情(express+ion)

impress v 盖印,使感动(im进+press=压进去=盖印=印入头脑=感动)

impression n 印象,感想(impress+ion)

impressive a 给人深刻印象的(impress+ive)

oppress v 压迫,虐待(op加强动作+press=拼命压=压迫)

oppression n 压迫,苦难(oppress+ion)

repress v 镇压,抑制(感情)

(re回+press=压回去=镇压)

suppress v 镇压,忍住(眼泪等)

(sup下去+press=压下去=忍住)

suppression n 镇压,平定(suppress+ion)

oppression = n.压迫;苦难(oppress+ion)

[press=press,表示"挤压"]

opt = vi.抉择,选择He opted to go alone.他决定独自一人去.

optic = a.眼的,视力的(opt+ic)

[opt,opto=sight,表示"视力"]

optical = a.眼的,视力的;光学的He has an optical defect.他有种视力缺陷.

optics = n.光学(opt视力+ics学科)

[opt,opto=sight,表示"视力"]

optimism = n.乐观主义(optim+ism→向最好方面想的主义→乐观主义)

[optim=best,表示"最好"]n.乐观主义(optim最好)

[-ism①表示"各种主义,宗教"②表示"学术或学术流派"③表示"行为,现象,状态"④表示"疾病"⑤表示"具备某种牲质"]

optimistic = a.乐观主义的The optional helicopter is adopted to help the optimistic helpless in the hell.可选用的直升飞机被用来帮助地狱里那些乐观的无助者.a.乐观的(optim+ist+ic)

[optim=best,表示"最好"]

optimsm = optimsm n 乐观主义(optim+ism=向最好方面想的主义=乐观主义)

optim=bext,表示”最好” optimsm n 乐观主义(optim+ism=向最好方面想的主义=乐观主义)

optimistic a 乐观的(optim+ist+ic)

optimum n (生物成长)

最适宜的条件或环境(optim+um表示场地,如:museum博物馆)

optimum = (生物成长)

最适宜的条件或环境(optim+um表示场地,如：museum博物馆)

[optim=best,表示"最好"]a.最适宜的n.最适宜(条件)

If you wait for the optimum moment to act, you may never begin your project.

option = n.选择(权)

,[商]选择买卖的特权We have the option of going or not.我们有去或不去的选择自由.n.选择(opt+ion)

[opt=choose,表示"选择"]

optional = a.可以任选的,随意的,非强制的The optional helicopter is adopted to help the optimistic helpless in the hell.可选用的直升飞机被用来帮助地狱里那些乐观的无助者.a.可任意选择的(option+al)

[opt=choose,表示"选择"]

optometer = n.视力计(opto+meter测量[计])

[opt,opto=sight,表示"视力"]

optometrist = n.验光师(opto+metr测量+ist)

[opt,opto=sight,表示"视力"]

or = conj.或,或者(表示选择)

;即,大约;否则The maximum plus or minus the minimum makes minute difference.最大值加上或者减去最小值只产生极小的差异.