oak n.栎木;栎属树oar n.桨;搅棒\nv.划;划过oarsman n.桨手oasis n.绿洲;沃洲oath n.誓言;咒骂obcordate adj.倒心形的;固执的obedience n.服从;顺从obedient adj.服从的obeisance n.敬礼;敬重obese adj.肥胖的obeyv.服从;遵守obituary adj.关于死亡的\nn.讣告object n.对象;物体\nv.提出;反对objection n.不喜欢;反对objective adj.客观的;目的的\nn.宾格;目的objector n.反对者oblation n.供物obligate v.强使;施恩惠于obligation n.合同;义务obligatory adj.有义务的;专性的oblige v.强使;使感激oblique adj.斜的\nadv.成四十五度角地\nn.间接格;斜肌obliteratev.忘掉;消灭oblivion n.大赦;遗忘oblong adj.长方形的\nn.长方形obloquy n.丑名;指责obnoxious adj.有害的;讨厌的obscene adj.不祥的;淫秽的obscenityn.淫秽obscure adj.晦涩的;无名的\nv.使变暗;使难解obsequies n.葬礼obsequious adj.巴结的;服从的observant adj.当心的\nn.观察者observe v.观察;说observer n.观察员;观察者obsess v.困扰;迷住obsession n.着迷;着魔obsolete adj.废弃的;废退的obstacle n.栅栏;障碍obstinate adj.顽固的;顽强的obstruct v.遮没;阻碍obtain v.持有;达到obtainable adj.能获得的obtrude v.强加;伸出obtuse adj.迟钝的;钝的obverse adj.倒的;对应的\nn.前面;正面obviate v.排除obvious adj.挡道的;显然的occasion n.时机;时刻\nv.引起occasional adj.临时的;偶尔的occult adj.超自然的;秘密的\nn.神秘学\nv.掩蔽;遮掩occupant n.占用者;占有人occupation n.占领;占有;职业occupier n.占领者;占用人occupy v.占;占领\nbe occupied in从事于\nbe occupied with从事于occur v.存在;发生occurrence n.存象;发生ocean n.海洋;海ochre adj.赭色的\nn.钱;赭色octagon n.八边形;八角形octave n.八度;八度音栓octopus n.章鱼状物ocular adj.像眼睛的;眼的\nn.目镜oculist n.眼科医师;验光师odd adj.奇数的;单只的;古怪的oddity n.怪人;奇特oddly adv.奇特地oddsn.机会;投注赔率ode n.抒情诗odious adj.可憎的odium n.不名誉;憎恨odour n.名声;气味of prep....的;含有...的off prep.离...;偏离...offal n.垃圾;下水offence n.犯法行为;冒犯offend v.冒犯;违犯offender n.犯法的人;冒犯者offensive adj.进攻的;冒犯的\nn.进攻offern.发价;给予\nv.给予;提出offertory n.奉献经;献金offhand adj.不友好的;随便的\nadv.不假思索地office n.办公室;处officer n.船长;法警official adj.公职的;正式的\nn.官员;行政人员officiate v.行使;主持officious adj.非官方的;殷勤的offing n.近岸锚泊;离岸距离offset adj.补偿的;断错的\nn.补偿;支管\nv.把...并列;补偿offshoot n.岩枝;支族offspring n.结果;崽;子孙often adv.常常;通常oil n.石油;油\nv.溜;融化oilcake n.豆饼oilfield n.油田oilskin n.防水油布;防水雨衣oily adj.含油的;油的ointment n.油膏ok adj.表示同意的\nadv.好\nn.同意\nv.批准okayadj.表示同意的\nadv.好\nn.同意\nv.批准old adj....岁的;老的oleaginous adj.产油的;油似的oligarchy n.寡头政治oligopoly n.寡头卖主垄断oliveadj.木犀科的;油橄榄的\nn.油橄榄;橄榄olympiad n.奥林匹克运动会omega n.最后一个omelette n.煎蛋饼omen n.预兆;预兆性\nv.预测;预示ominous adj.不祥的;预示的omission n.省略;遗漏omitv.省略;无视omnibus adj.综合的\nn.公共汽车;选集omnipotent adj.绝对的;全能的\nn.万能者omniscient adj.无所不知的omnivorous adj.杂食性的on prep.靠近...;在...里onceadv.一次;一旦\nconj.一旦...one n.一;一体onerous adj.沉重的;有偿的oneself pron.亲自;自己onion n.洋葱;洋葱头online adj.联机的;在线的\nadv.联机地onlooker n.旁观者only adj.独生的;唯一的\nadv.不料;只onset n.攻击;开始onslaughtn.攻击ontoprep.到...之上;对...熟悉onusn.负担;过失;义务onward adj.向前的oozen.渗流;鞣液\nv.渗出;显示出opal n.蛋白石opaque adj.不传导的;不反光的\nn.不透明体open adj.开着的;空旷的\nn.旷野;露天\nv.开;开辟openwork n.透雕细工opera n.歌剧;歌剧院operable adj.可操作的;可实施的operate v.操作;经营operationn.操作;活动operative adj.操作的;有效的\nn.技工;侦探operator n.操作员;机务员opinion n.评价;意见opponentn.对手;对向肌opportune adj.及时的;恰好的oppose v.反对;阻挡opposite adj.对面的;反对的\nadv.在对面\nn.对边;对立物\nprep.在...的对面opposition n.敌对;反对oppress v.压服;压迫oppression n.压迫;压抑oppressive adj.压迫的;压抑的optical adj.光学的;眼的optician n.眼镜商optics n.光学optimism n.乐观;乐观主义optimist n.乐观者optimistic adj.乐观的optimum adj.最适的\nn.最大限度;最适条件option n.选择;选择权optional adj.随意的opulent adj.丰富的;富裕的opusn.作品;作品编号or conj.或者oral adj.口的;口服的\nn.口试orange adj.橙黄色的;柑橘的\nn.橙;橙树orangeade n.橘子水orangutang n.猩猩oration n.演说;引语orator n.演说者;原告oratory n.演讲术;小礼拜堂orb n.宝球;球\nv.包围;成球状orbitn.范围;轨道\nv.进入轨道orchard n.棒球场;果园orchestra n.管弦乐队orchestral adj.管弦乐队演奏的ordain v.规定;命令ordeal n.苦难经历;神明裁判order n.次序;整齐\nv.命令;整理orderly adj.守秩序的;整齐的ordinal adj.序数的;顺序的\nn.授圣职礼书ordinance n.法令;既定规则ordinary adj.平常的;平庸的\nn.常任法官;寻常ordnance n.火炮;军械organ n.风琴;机构organic adj.器官的;有机的organism n.机体;生物organist n.风琴演奏者organize v.组织;组织工会orgasm n.极度兴奋;性高潮orgy n.纵欲;狂欢会orient n.东;东方\nv.给...定向;适应orientate v.适应;引导orifice n.孔origin n.出身;起端original adj.起初的\nn.原型;原作originate v.创始;引起ornament n.装饰;装饰品\nv.为...增光;装饰ornamental adj.观赏的;装饰的\nn.观赏植物ornate adj.装饰的orphan adj.无父母的\nn.孤儿;遗孤orphanage n.孤儿;孤儿院orthodox adj.传统的;通常的\nn.正统派;正统者orthodoxy n.东正教;正统性oscillate v.摆动;动摇ossify v.骨化;僵化ostensible adj.表面上的;可公开的ostracize v.放逐;排斥ostrich n.鸵鸟other adj.别的;不同的\nn.对立的事物otherwise adv.别样;不然otter n.水獭;水獭毛皮ottoman n.软垫凳ought v.欠;占有ounce n.盎司;雪豹our det.我们的ours pron.我们的ourself pron.我自己ourselves pron.我们亲自;我们自己oust v.剥夺;驱逐out adv.出;呸\nprep.从...里面;从...中出来outbid v.超过;出价高于outbound adj.向外去的outbreak n.暴乱;爆发outcast adj.被丢弃的;被抛弃的\nn.流浪者outclass v.比...等级高;轻易击败outcome n.出口;结果outcrop n.出现;露头\nv.出现;露出地表outcry n.喊叫;拍卖outdated adj.过时的outdo v.战胜outdoor adj.户外的outdoors adv.在户外\nn.户外outer adj.在外的outermost adj.最外面的outface v.无畏惧地面对outfight v.比...打得出色outfit n.全套服装;一队人\nv.装备;获得装备outfitter n.服装商店outflank v.翼侧包抄;智胜outgo n.出口;外出outgoing adj.将离职的;友好的outgoingsn.开支outgrow v.长得比...快;长出outgrowth n.长出;长出物outhouse n.附属建筑;户外厕所outlandish adj.偏僻的;稀奇古怪的outlast v.比...持久;比...活得长outlaw n.歹徒\nv.将...放逐outlay n.费用;花费\nv.花费outlet n.出口;出水渠道outline n.提纲;外形\nv.概述;描...的外形outlive v.比...活得长outlook n.观点;景色outlying adj.无关的outnumber v.比...多outpatient n.门诊病人outplay v.打得比...好outpost n.前哨;前哨基地output n.产量;产品\nv.使出outrage n.侮辱\nv.对...施暴行;伤害outrageous adj.无耻的;凶暴的outright adj.全部的;无保留的\nadv.全部地;无保留地outsell v.售价比...高outset n.起始outside n.外表;外面\nprep.除了;在...的外面outsider n.局外人outskirts n.郊区outspoken adj.直言的outstay v.以耐力超过outstrip v.超过;经过outward adj.外表的;外面的\nadv.出海;向外outwards adj.向外的\nadv.向外地outwit v.智胜outwork n.外部工作\nv.做完oval adj.椭圆形的\nn.椭圆形ovary n.果心;卵巢ovation n.热烈欢迎;小凯旋式ovenn.干燥炉;烤炉over adv.报文完;下\nprep.高于;在...的上方overact v.行动过火overall adj.总的\nadv.从头到尾;总的说来overawe v.吓服overboard adv.向舷外overcast adj.沮丧的;遮蔽的\nn.沮丧;阴\nv.包缝;遮蔽overcoat n.保护层;外套overcome v.克服;胜过overdo v.做得过分overdraft n.透支overdraw v.透支;夸张overdressn.罩衣\nv.穿得过于讲究overdue adj.过大的;过期的overflow n.泛滥;溢出\nv.淹没;泛滥overgrown adj.植被蔓生的overhang n.突出量;悬垂\nv.逼近;逼近overhaul n.彻底革新;解体检修\nv.彻底革新;赶上overhead adj.经常的;头上的\nadv.在头顶\nn.固定装置;过顶扣球overhear v.无意中听到overland adv.横越大陆地overlap n.互搭;互搭量\nv.与...互搭;互搭overload n.超载\nv.使超载;装填...过满overlook n.忽视\nv.忽视;宽恕overmuch adj.过多的\nadv.过多地\nn.过量overnightadj.一整夜的\nadv.一下子overpass n.跨线桥\nv.超越;穿过overpay v.多付;多付给overpower v.压倒overrate v.对...估计过高overreach v.智胜;诈骗override v.不顾;撤销overrule v.否决;强使变更overrun n.超出量;蔓延\nv.窜犯;覆盖overseas adj.海外的\nadv.在海外oversee v.监视;眺望overseer n.监工overshadow v.给...遮暗oversight n.失察;照管overstate v.把...讲得过分overstay v.呆得太久overstep v.超越overstockv.进货过多overstrung adj.斜钢丝的overt adj.公开的;明显的overtake v.赶上;追赶overtax v.使负担过重overthrow n.推翻;终止\nv.打翻;推翻overtime adj.加班的\nadv.超时地\nn.加班;加班费overture n.序曲;序言\nv.向...作主动表示overturn n.翻转;周转\nv.颠覆;倾覆overweight adj.超重的\nn.超重\nv.过于着重overwhelm v.覆盖;征服overwork n.额外工作\nv.把...做过头;工作过度oviduct n.输卵管ovulate v.产卵ovum n.卵;卵形饰owe v.欠;欠钱owl n.猫头鹰own adj.自己的\nn.属于自己的东西\nv.承认;有owner n.船长;物主ownership n.所有权;占有ox n.牛;去势公牛oxide n.氧化物oxidize v.生锈;氧化oxygen n.氧oyster n.牡蛎oz n.盎司ozone n.臭氧。