第一部分

oblige[ə’blaɪʤ]

vt. 迫使,责成〈同 force, compel〉
例 The law obliges companies to pay decent wages to their employees.
法律强制公司向其员工支付合理的工资。
联 obliging adj. 亲切的,有礼貌的;oblique adj. 倾斜的;不坦率的

obliterate[ə’blɪtəreɪt]

vt. 涂掉,擦掉〈同 delete, erase〉
例 I am willing to forgive you, but I can never obliterate from my mind the memory of your dishonesty.
我愿意原谅你,但我永远无法从脑海中抹去关于你不诚实的记忆。
联 oblivious adj. 遗忘的,健忘的;iterate vt. 反复说,重申;illiterate n. 文盲 adj. 不识字的;没受教育的;adulterate adj. 掺假的;通奸的

obsession[əb’se∫ən]

n. 入迷;固执的念头〈同 fascination, mania〉
例 Fear of falling victim to some dreadful disease can become such an obsession that it actually drives a person into a nervous breakdown.
对于染上某些严重疾病的担忧可能成为一种强迫症,实际上会让一个人精神崩溃。
联 obsessed adj. 心神不宁的

obstinate[’ɒbstɪnət]

adj. 倔强的,顽固的〈同 stubborn, headstrong〉
例 The negotiations were useless because of the obstinate thinking between the countries’ two leaders.
由于两国领导人固执的想法,谈判没有任何用处。
联 obstinacy n. 固执;obstacle n. 障碍;procrastinate v. 延迟,耽搁;headstrong adj. 固执的,任性的

occasional[ə’keɪʒənəl]

adj. 偶然的;临时的〈同 incidental; random〉
例 Except for an occasional hiker, this wilderness is unpopulated.
除了偶尔会有徒步旅行者外,这片荒地人烟稀少。
联 occasionally adv. 偶尔

occupation[ˌɒkjʊ’peɪ∫ən]

n. 职业〈同 job, vocation〉
例 His occupation as a dentist earned him a decent living.
牙科医生的职业让他过上了体面的生活。

offshore[’ɒf∫ɔ:(r); (US)’ɔ:f-]

adj. 离岸的,海面上的
例 The offshore boats were told about the coming storm and advised to return to shore.
离岸船只被告知暴风雨即将来临,并收到建议返回岸边。

olfactory[ɒl’fæktəri]

adj. 嗅觉的
例 The human olfactory organ is the nose.
人类的嗅觉器官是鼻子。
联 olfaction n. 嗅觉;tactile adj. 触觉的;aural adj. 听觉的

ongoing[’ɒngəʊɪŋ]

adj. 正在进行的〈同 continuous, existing〉
例 The development of this drug has been an ongoing project which is expected to be complete at the end of next year.
开发这种药物的项目一直都在进行,预计将在明年年底结束。

onset[’ɒnset]

n. ①(病)发作〈同 attack〉
例 The onset of arthritis stopped the old lady from using the stairs.
关节炎发作,那名老太太无法爬楼梯。
②开始〈同 beginning, start〉
例 The onset of this disease is gradual.
这种病是逐渐发作的。
联 onshore adj. 向着海岸的,陆上的;onstage adj. 台上的,台上演出的

第二部分

onslaught[’ɒnslɔ:t]

n. 冲击;猛攻〈同 assault, attack〉
例 The barbarians continued their onslaught of innocent townspeople for weeks.
野蛮人数周以来持续攻击无辜的市民。

ooze[u:z]

n.【地】软泥〈同 mud, mire〉
例 A driver was stuck in the ooze and could not drive any further.
一名司机(的车)陷在软泥当中,无法继续前进。
v. 渗出,泄漏〈同 seep, flow〉
例 Sweat oozed from the athlete’s forehead and trickled down his cheeks.
汗水从运动员的前额渗出,并顺着他的脸颊往下流。
联 oozy adj. 软泥的;seep vt. 渗出;oolong n. 乌龙茶

opponent[ə’pəʊnənt]

n. 对手,反对者〈同 competitor, adversary〉
例 The team beat their opponents in today’s game.
在今天的比赛中,这支队伍击败了他们的对手。
adj. 敌对的,反对的〈同 adverse, hostile〉
例 The opponent army attacked our castle from two sides.
敌方军队从两侧攻击了我们的城堡。

opposite[’ɒpəzɪt]

n. 相反的事物
例 Night is the opposite of day.
与黑夜相对的是白天。
prep. 在…的对面
例 I live in the house opposite the museum entrance.
我住在博物馆入口对面的那栋房子里。

optimal[’ɒptɪməl]

adj. 最佳的,最理想的〈同 optimum, ideal〉
例 A mixture of selected funds is an optimal choice for future security and return on investment.
精选基金组合是获得未来保障和投资回报的最佳选择。
联 optimum adj. 最适宜的;optimist n. 乐观者;optimistic adj. 乐观的

orchard[’ɔ:tʃəd]

n. 果园〈同 garden〉
例 My grandfather has a large vegetable garden and an apple orchard behind his house.
我爷爷在房子后面有一大片菜园和一个苹果园。

orchid[’ɔ:kɪd]

n. 兰花
例 His favorite flower was the orchid.
他最喜欢的花是兰花。

ordeal[ɔ:’di:l]

n. 严峻考验,痛苦的经历〈同 trying experience, hardship〉
例 The hostages’ ordeal came to an end when soldiers stormed the building.
士兵们突袭大楼之后,人质们的痛苦经历终于结束了。

ordinance[’ɔ:dɪnəns]

n. 法令,条例〈同 law, decree〉
例 Passing a red light is a violation of a city’s ordinance.
闯红灯是违反城市法令的行为。
联 regulation n. 规则,规章;decree n. 法令,政令;ordinary adj. 平常的,普通的

originality[əˌrɪʤə’næləti]

n. 创意,新奇〈同 novelty, creativity〉
例 Playing the trumpet with dazzling originality, Louis Armstrong dominated jazz for 20 years.
路易斯·阿姆斯特朗以令人眼花缭乱的创意演奏小号,在爵士乐坛独领风骚20年。

第三部分

oust[aʊst]

vt. 驱逐;赶走〈同 eject, expel〉
例 The police moved with alacrity to oust the disorderly mobs.
警察迅速赶来驱逐骚乱的暴民。

outcry[’aʊtkraɪ]

n. 大声疾呼;强烈抗议〈同 protest, shout〉
例 An outcry for more practical instruction arose among the students and educators.
学生和教育工作者发出了要求更多实践教学的强烈呼声。
联 outcome n. 结果,成果;outdated adj. 过时的,不流行的;clamor n. 喧闹,叫嚷;outcast n. 被驱逐者

outdated[ˌaʊt’deɪtɪd]

adj. 过时的〈同 old, outmoded〉
例 Technology has moved so fast that new software tends to get outdated in only a couple of years.
技术变化得如此迅速,仅仅几年时间,新软件就会过时。

outermost[’aʊtəməʊst]

adj. 最外边的,离中心最远的〈同 farmost, utmost〉
例 The outermost part of this fruit is hard but once you take it off, the fruit is soft and sweet.
这种水果最外面的部分很硬,但剥去外面的部分后,里面的果肉软糯香甜。

outfit[’aʊtfɪt]

n. 服装〈同 costume, clothes〉
例 The model was wearing a cute outfit.
那名模特穿着一套非常可爱的服装。
vt. 配备,装备〈同 equip, furnish〉
例 He outfitted his jeep with rooflights.
他为自己的吉普车配备了车厢顶灯。
联 garment n. 衣服;apparel n. 服装;garb n. 服装 vt. 装扮

outgoing[’aʊtgəʊɪŋ]

adj. 好交际的,外向的〈同 sociable, extroverted〉
例 Sales representatives need to be outgoing and dynamic.
销售代表需要外向而有活力。
联 outgo vt. 走得比…远或快;优于;incoming adj. 即将开始的;新任的

outgrow[ˌaʊt’grəʊ]

vt. 生长速度超过,长得比…快〈同 grow beyond〉
例 By age 16, John had outgrown his elder brother.
约翰在16岁的时候,身高就超过了他哥哥。
联 outgrowth n. 自然的结果;派生物;surpass vt. 超越,胜过;outstrip vt. 超过;outlive vt. 比…长命;outweigh vt. 重于,比…重

outlast[ˌaʊt’lɑ:st; (US)-‘læst]

vt. 比…长久,比…活得长〈同 outlive〉
例 Our company outlasted many others through the economic crisis.
我们公司平安渡过了经济危机,比其他公司存在的时间都要长。

outlying[’aʊtlaɪɪŋ]

adj. 边远的,偏僻的〈同 remote〉
例 The underground railway does not reach some of the city’s outlying areas.
地铁尚未延伸到城市的部分偏远区域。

outmoded[ˌaʊt’məʊdɪd]

adj. 不再流行的,过时的〈同 obsolete, outdated〉
例 He dressed in an outmoded fashion.
他穿着一套过时的服装。

第四部分

outrage[’aʊtreɪʤ]

n. 暴行〈同 atrocity, barbarity〉
例 The tyrant was guilty of many outrages.
那个暴君犯有许多桩暴行。
vt. 激怒,引起…义愤〈同 enrage, offense〉
例 The king was outraged by the man’s insult and ordered that his head be cut off.
国王被那个人的辱骂激怒,于是下令砍掉他的脑袋。

outright[’aʊtraɪt]

adv. 立刻地,全部地〈同 altogether; entirely〉
例 A mortgage enables a person to buy property without paying for it outright; thus more people are able to enjoy owning a house.
抵押贷款使一个人无需支付全款便可购买房产;因此,越来越多的人可以拥有一套房子。
联 outride vt. 骑得比…快;upright adj. 垂直的,直立的;copyright n. 版权,著作权;outfight vt. 胜过,赛过

outskirts[’aʊtskɜ:ts]

n. 市郊
例 He could only afford living in the outskirts where rent was cheap.
他只能租得起租金便宜的郊区的房子。

outspoken[aʊt’spəʊkən]

adj. 坦率直言的〈同 blunt, candid〉
例 I know I shall get the truth when I ask Alice because she is very outspoken.
我知道如果我问艾丽斯,我就能得知真相,因为她总是直言不讳。

outweigh[ˌaʊt’weɪ]

vt. 比…重;比…更重要〈同 surpass; dominate〉
例 We know these chemicals are dangerous, but their benefits far outweigh any risk to the environment.
我们知道这些化学品非常危险,但它们的好处远远超过了对环境造成的风险。

overburden[ˌəʊvə’bɜ:dən]

vt. 使装载过多;使负担过多〈同 overcharge〉
例 The gambler was overburdened with debts.
那个赌徒负债累累。

overcast[’əʊvəkɑ:st; (US)-kæst]

adj. 阴天的,阴暗的〈同 cloudy, gloomy〉
例 The weatherman predicts tomorrow will be an overcast day with a chance of rain.
气象预报员预测,明天将是阴天,可能有雨。

overcharge[ˌəʊvə’tʃɑ:ʤ]

v.(对…)索价过高〈同 overprice〉
例 Be careful not to get overcharged when you go shopping.
去购物的时候小心一点,别花了冤枉钱。

overdue[ˌəʊvə’dju:; (US)-‘du:]

adj. 迟到的;逾期的〈同 late〉
例 The books need to be returned to the library before they are overdue.
这些书在到期之前必须还回图书馆。

overhaul[’əʊvəhɔ:l]

vt. 彻底检查,大修〈同 restore, repair〉
例 You have to overhaul your paper until it becomes really clear to the reader.
你必须对你的论文进行彻底检查,直到读者能够完全读懂为止。
联 haul v. 拖,拉;overhear v. 无意中听到,偷听到;overhang v. 悬于…之上,悬垂