n. （某企业的）经营者( operator的名词复数 )，（机器、设备等的）操作员，电话接线员，投机取巧者；

[例句] He dialled the operator and put in a call for Rome.

[例句] ...computer operators.

v. 使…模糊不清，掩盖( obscure的过去式和过去分词 )；

[例句] The origin of the custom is obscure...

[例句] The hymn was written by an obscure Greek composer for the 1896 Athens Olympics.

n. 目标( objective的名词复数 )，[光学]（望远镜、显微镜、照相机及其他光学仪器上的）物镜，[语法学]1)。 宾语 2)。 宾格，[军事]出击目标；

[例句] Our main objective was the recovery of the child safe and well...

[例句] His objective was to play golf and win.

n. 观察资料( observation的名词复数 )，观察力，注意，言论；

[例句] ...careful observation of the movement of the planets...

[例句] In hospital she'll be under observation all the time.

v. 使（某物）被遮暗( overshadow的过去式和过去分词 )，使阴暗，使（某事物）令人不快或减少乐趣，使（某人）相形见绌或黯然失色；

[例句] Fears for the President's safety could overshadow his peace-making mission...

[例句] Her childhood was overshadowed by her mother's incarceration in a psychiatric hospital.

v. 对（数量）估计过高，对…作过高的评价( overestimate的过去式和过去分词 )；

[例句] With hindsight, he was overestimating their desire for peace.

[例句] The importance of participating in the life of the country cannot be overestimated...

n. 方向( orientation的名词复数 )，定位，（任职等前的）培训，环境判定；

[例句] ...a marketing orientation...

[例句] To a society which has lost its orientation he has much to offer...

出其不意，出乎意料；

n. 牛津鞋（一种系鞋带的皮鞋）oxfords；

n. 80到89岁的人；

n. （水）獭，水獭皮，一种钓具；

adj. 不愉快的，厌恶的；v. 冒犯(offend的ing形式)；

[例句] The book was withdrawn for the offending passages to be deleted...

[例句] The dentist commenced to dig, drill and finally fill the offending tooth.

v. （使）吃得过多( overeat的现在分词 )；

[例句] If you tend to overeat because of depression, first take steps to recognize the source of your sadness.

[例句] ...people who overeat spicy foods.

n. 过度单纯化（的事物）；

[例句] One should not oversimplify the situation...

[例句] To judge trips as if they're successes or failures may be oversimplifying things.

n. 橄榄( olive的名词复数 )，橄榄树，橄榄色，油橄榄；

[例句] Olives look romantic on a hillside in Provence.

[例句] ...an olive grove.

[计][修]孤立；

[例句] I'm an orphan and pretty much grew up on my own.

[例句] ...a young orphan girl brought up by peasants...

adv. 外表上，表面上，在外面，外部地；

[例句] They may feel tired and though outwardly calm, can be irritable...

[例句] Outwardly this looked like the beginning of a terrific programme but the stage was actually set for a major disaster.

n. 提纲( outline的名词复数 )，要点，外形，概述；v. 画[标]出…的轮廓( outline的第三人称单数 )，概述，列提纲；

[例句] The mayor outlined his plan to clean up the town's image...

[例句] The methods outlined in this book are only suggestions.

v. 因过于雄心勃勃而失败( overreach的现在分词 )；

[例句] He overreached himself and lost much of his fortune...

[例句] The company had overreached itself and made unwise investments...

相继地，依次地，先后，连，接二连三；