B1 adjective /ˌoʊvərˈweɪt/

overweight

超重

Meaning

heavier than is considered healthy or normal

Example

The doctor advised him to lose weight as he was overweight.

医生建议他减肥，因为他超重。

B2 adjective /ˌɔːɡənaɪˈzeɪʃənəl/

organizational

组织性的

Meaning

relating to the structure or arrangement of a company or group

Example

He works on improving the organizational structure of the company.

他在改善公司的组织结构方面工作。

C1 verb /ˌoʊvərˈθroʊ/

overthrow

幸福

Meaning

To remove a leader or government from power, often by force.

Example

The rebels planned to overthrow the corrupt regime.

她在收到奖项时无法掩饰她的幸福感。

C2 adjective /ˈoʊdiəs/

odious

可憎的

Meaning

extremely unpleasant or repulsive

Example

The dictator was remembered for his odious crimes.

这位独裁者因他可憎的罪行而被记住。

C1 adjective /ˌəʊvərˈstɪmjʊˌleɪtɪd/

overstimulated

过度刺激的

Meaning

Excessively excited or aroused, overwhelmed by too much stimulus.

Example

Overstimulated minds can lead to burnout and decreased productivity.

过度刺激的头脑可能导致倦怠和生产力下降。

C2 noun ˈoʊʃən ˌstrætɪfɪˈkeɪʃən

ocean stratification

海洋分层

Meaning

The formation of layers in ocean water due to differences in density.

Example

Ocean stratification affects marine biodiversity.

海洋分层影响海洋生物多样性。

C2 noun /oʊˈbleɪʃən/

oblation

献祭

Meaning

a religious offering, especially of bread or wine to God

Example

The priest placed the oblation on the altar during the ceremony.

祭司在仪式中将献祭放在祭坛上。

C2 noun /ˈoʊvərlɔːrd/

overlord

领主

Meaning

A ruler, master, or person of great power and authority over others.

Example

The peasants were forced to pay taxes to their overlord.

农民被迫向他们的领主交税。

B1 noun /ˈɑː.lɪv/

Olive

橄榄

Meaning

a small oval fruit with a hard pit, typically green or black, used for eating or making oil

Example

Olive oil is considered one of the healthiest cooking oils available.

橄榄油被认为是最健康的烹饪油之一。

C2 verb /ˈoʊɡəl/

ogle

色迷迷地看

Meaning

To look at someone with obvious sexual interest.

Example

He kept ogling the models on the runway.

他一直盯着跑道上的模特看。

C1 noun /əˈkɜr.əns/

Occurrence

事件

Meaning

an instance or event of something happening; the fact of occurring

Example

The occurrence of earthquakes is common in this region.

地震的发生在这个地区很常见。

A1 adverb /ɔːf/

off

关

Meaning

away from a place, position, or time; not functioning

Example

He turned off the light before leaving the room.

他在离开房间之前关掉了灯。

C1 noun /ˈoʊvərˌtoʊn/

overtone

微妙的含义

Meaning

A subtle quality, implication, or additional meaning beyond the obvious.

Example

His speech had political overtones that were hard to ignore.

他的演讲具有政治性含义，难以忽视。

B2 noun /ˈaʊt.breɪk/

Out-break

爆发

Meaning

a sudden occurrence or eruption of something, especially disease or violence

Example

The outbreak of flu affected many students in the school.

流感的爆发影响了学校的许多学生。

A1 noun /ɒkˈtoʊbər/

october

十月

Meaning

the tenth month of the year in the Gregorian calendar

Example

The weather becomes cooler in October.

十月天气开始变凉。

A1 noun/adjective/adverb /ˌaʊtˈsaɪd/

outside

外面

Meaning

the external part or surface of something; beyond the boundary

Example

Children were playing outside in the yard.

孩子们在院子外面玩。

B2 noun ˈəʊnəʃɪp

ownership

所有权

Meaning

The act, state, or right of possessing something; legal title to something.

Example

Ownership of resources was crucial.

资源的所有权至关重要。

C2 verb ˈɑːb.fə.skeɪt

obfuscate

使模糊，掩盖，混淆

Meaning

Render obscure, unclear, or unintelligible.

Example

Politicians often obfuscate facts to mislead people.

政客们经常使事实变得模糊，以误导人民。

B2 noun /ˌɔː.ri.enˈteɪ.ʃən/

orientation

定向

Meaning

the process of becoming familiar with a new situation or environment

Example

The company provides an orientation for all new employees.

公司为所有新员工提供定向培训。

C1 noun /ˌɑːsɪˈleɪʃən/

oscillation

摆动

Meaning

The movement back and forth at a regular speed.

Example

The oscillation of the pendulum controls the clock.

摆锤的摆动控制着时钟。

B1 noun /ˈɑp.ʃən/

Option

选项

Meaning

a thing that is or may be chosen; an alternative course of action

Example

You have the option to work from home or office.

你可以选择在家工作或在办公室工作。

A2 adjective /ˈɔː.dɪ.nər.i/

Ordinary

普通的; 常见的; 不特别的

Meaning

normal; usual; not special

Example

It was just an ordinary day at the office.

那只不过是办公室里的普通一天。

B2 noun /ˈɔːrɡənaɪzər/

organizer

组织者

Meaning

a person who arranges or coordinates activities, events, or groups; a tool or item used to keep things in order

Example

She worked as the main organizer of the international conference.

她是这次国际会议的主要组织者。

C1 noun /ˈoʊ.mən/

Omen

未来好运或厄运的征兆

Meaning

an event regarded as a sign of future good or bad luck

Example

Many people consider a black cat crossing your path a bad omen.

许多人认为一只黑猫横穿你的路是一个坏预兆。

B1 noun /əˈkeɪ.ʒən/

Occasion

场合; 特殊事件

Meaning

a particular time or instance of an event; a special celebration

Example

Their wedding was a joyous occasion.

他们的婚礼是一个喜庆的场合。

C2 noun /ɑːlˈfækʃən/

olfaction

嗅觉

Meaning

The sense of smell; the process of detecting and perceiving odors.

Example

Dogs have a highly developed sense of olfaction.

狗的嗅觉非常发达。

B2 noun /ˈaʊtˌbreɪk/

outbreak

爆发

Meaning

a sudden start or occurrence of something unpleasant, like disease or violence

Example

There was an outbreak of flu in the city.

城市中爆发了流感。

C1 noun /ˈəʊ.nəs/

onus

责任

Meaning

A duty or responsibility, especially a heavy one.

Example

The onus is on the government to provide relief to the victims.

政府有责任向受害者提供援助。

C1 adjective /ɒmˈnɪv.ər.əs/

Omnivorous

杂食性动物

Meaning

eating both plants and animals; feeding on various kinds of food

Example

Bears are omnivorous animals that eat both plants and meat.

熊是杂食性动物，吃植物和肉。

A1 preposition /ɒn/

on

在

Meaning

physically in contact with and supported by a surface

Example

The book is on the table.

书在桌子上。

C2 adjective /ˈɒpjʊlənt/

opulent

奢华的

Meaning

Ostentatiously rich, luxurious, or lavish.

Example

They hosted an opulent wedding with gold decorations.

他们举办了一场奢华的婚礼，装饰有金色装饰品。

C1 verb /ˌoʊvərˈriːtʃ/

overreach

过度伸展

Meaning

to go beyond what is proper, acceptable, or achievable; to overextend

Example

The politician overreached by making promises he couldn't keep.

那位政治家在做出无法兑现的承诺时，过度伸展了自己。

C2 noun /ˌɔːrnɪˈθɒlədʒɪst/

ornithologist

鸟类学家

Meaning

a scientist who studies birds

Example

The ornithologist spent years studying migratory birds.

这位鸟类学家花了多年时间研究迁徙鸟类。

B1 adverb /əˈrɪdʒɪnəli/

originally

最初

Meaning

in the beginning, at first

Example

Originally, she wanted to be a doctor.

最初，她想成为一名医生。

B2 adjective /ˈɔɪl.i/

Oily

油腻的; 油覆盖的; 油滑的

Meaning

covered with oil; containing oil; greasy

Example

Her oily skin needs special care.

她的油腻皮肤需要特别护理。

B1 noun /ˌɒp.əˈtjuː.nə.ti/

opportunity

机会

Meaning

A favorable chance or set of circumstances that makes it possible to do something.

Example

She seized the opportunity to study abroad.

她抓住了去国外学习的机会。

C2 noun /ˌɒn.əˌmæt.əˈpiː.ə/

onomatopoeia

拟声词

Meaning

The formation of a word from a sound associated with what is named.

Example

The word 'buzz' is an example of onomatopoeia.

‘buzz’ 这个词是拟声词的一个例子。

C1 verb /ˌaʊtˈstrɛtʃ/

outstretch

伸展

Meaning

To extend or stretch something outward.

Example

He outstretched his hand to help her up.

他伸出手来帮助她站起来。

B2 verb əbˈzɜːrvd

observed

庆祝

Meaning

To celebrate or keep a religious or other festival.

Example

The day is observed annually to raise awareness.

这一天每年庆祝，以提高意识。

B1 noun /ˈɑb.stə.kəl/

Obstacle

障碍

Meaning

something that blocks or makes progress difficult; a barrier

Example

Bad weather was the main obstacle to our journey.

坏天气是我们旅行的主要障碍。

B2 adjective /ˈaʊtˌɡoʊɪŋ/

outgoing

外向

Meaning

Friendly and sociable; inclined to mix with others.

Example

He is an outgoing person who loves meeting new people.

他是一个外向的人，喜欢结识新朋友。

B2 noun /ˈaʊtˌfɪt/

outfit

服装

Meaning

A set of clothes worn together, often for a particular occasion.

Example

She wore a beautiful outfit to the party.

她穿了一套漂亮的服装去参加派对。

B2 noun ˈɒksɪdʒən prəˈdʌkʃən

oxygen production

氧气生产

Meaning

The process of generating oxygen through photosynthesis or other means.

Example

Plants are vital for oxygen production and the maintenance of life.

植物对于氧气生产和维持生命至关重要。

A1 adverb /aʊt/

out

外面

Meaning

moving or appearing away from the inside or center; not at home or present

Example

He stepped out of the room quietly.

他悄悄地走出房间。

C2 noun /ˈoʊdiəm/

odium

憎恶

Meaning

general or widespread hatred or disgust directed toward someone as a result of their actions

Example

The scandal brought public odium on the corrupt minister.

丑闻让腐败的部长蒙受了公众的憎恶。

C1 adjective /oʊˈvɜːrt/

overt

公开的

Meaning

Done or shown openly; not hidden or secret.

Example

There was an overt display of hostility between the rivals.

在对手之间有一种公开的敌意表现。

A1 conjunction /ɔːr/

or

或

Meaning

used to link alternatives

Example

You can have tea or coffee.

你可以喝茶或咖啡。

B2 adverb /ˈəʊvəli/

overly

过度

Meaning

to an excessive degree or extent

Example

She was overly concerned about the results.

她对结果过于担忧。

C1 adjective /ˈɒptɪməm/

optimum

最优

Meaning

Most conducive to a favorable outcome; best.

Example

To achieve optimum results, we need to improve efficiency.

为了获得最佳结果，我们需要提高效率。

B1 adjective /ˌoʊvərˈsiːz/

overseas

海外

Meaning

in or to a foreign country across the sea

Example

He went overseas for higher education.

他去海外深造。

A2 preposition /ˈɒntu/

onto

在…上

Meaning

moving to a position on the surface of something

Example

She jumped onto the table to get the book.

她跳到桌子上去拿书。

C1 adjective /əˈprɛs.ɪv/

Oppressive

压迫的

Meaning

Harsh and authoritarian; overwhelming; causing distress; tyrannical;

Example

The oppressive heat made it difficult to work outside during the summer.

压迫性的热浪使得夏天在外工作变得很困难。

C1 noun /ˈoʊvərˌtʊr/

overture

序曲 / 提议

Meaning

An introduction to something more substantial; a proposal or preliminary action.

Example

The peace overture was welcomed by both nations.

和平提议得到了两个国家的欢迎。

C2 noun /ˈɒkjʊlɪst/

oculist

眼科医生

Meaning

An old-fashioned term for an eye doctor or ophthalmologist.

Example

The village oculist was known for treating various eye diseases.

村里的眼科医生以治疗各种眼病而闻名。

A1 preposition /ʌv/

of

的

Meaning

expressing the relationship between a part and a whole

Example

The book is on the table, in front of the window.

书在桌子上，在窗户前。

B2 noun /ˈɒfərɪŋ/

offering

提供

Meaning

something that is given, especially as a gift or contribution

Example

The company’s latest offering is an eco-friendly car.

公司的最新产品是一款环保汽车。

C1 noun /əbˈzɜːvəns/

observance

遵守

Meaning

The practice of following a custom, rule, or religious law.

Example

The festival is held in observance of a centuries-old tradition.

该节庆是为了遵守一项百年传统而举行的。

C1 noun /oʊˈmɪʃ.ən/

Omission

省略; 排除

Meaning

the action of excluding or leaving out someone or something; a failure to include

Example

The omission of his name from the list was intentional.

从列表中省略他的名字是故意的。

C2 noun /ˈɔːrdʒi/

orgy

荒淫派对

Meaning

A wild party involving excessive indulgence, especially of a sexual nature.

Example

The novel described a scandalous orgy in a wealthy mansion.

小说描述了在一座富裕的豪宅里举行的丑闻般的荒淫派对。

B2 adverb /ˈaʊtraɪt/

Outright

直接; 完全; 毫不保留

Meaning

completely; directly; without reservation or concealment

Example

She rejected the proposal outright.

她直接拒绝了那个提案。

C1 adjective /ˌoʊvərˈrɔt/

overwrought

焦虑 / 过度紧张

Meaning

extremely agitated or nervous; excessively elaborate

Example

She was too overwrought to speak clearly after the accident.

她在事故后太焦虑，无法清楚地讲话。

B2 noun /oʊˈbiː.di.əns/

Obedience

服从

Meaning

compliance with an order, request, or law; submission to authority

Example

Children should show obedience to their parents.

孩子们应该对父母表现出服从。

B2 noun ɔːˈɡæn.ɪk fuːdz

organic foods

有机食品

Meaning

Food produced without the use of chemicals such as artificial pesticides, fertilizers, or other artificial agents.

Example

Organic foods are healthier than processed foods.

有机食品比加工食品更健康。

B2 adverb /əˈfɪʃəli/

officially

正式地

Meaning

in a formal or authorized way

Example

The building was officially opened by the mayor.

这座建筑由市长正式开幕。

C2 noun /ˈɔːrdnəns/

ordnance

军火

Meaning

Military supplies including weapons, ammunition, and combat equipment.

Example

The army stored ordnance in a secure facility outside the city.

军队在城市外的一个安全设施中存储军火。

C1 verb /ˌoʊvərˈʃædoʊ/

overshadow

掩盖

Meaning

to appear more important or significant than something else, reducing its impact

Example

The scandal overshadowed his achievements.

丑闻掩盖了他的成就。

C1 noun /əˈfen.dər/

Offender

罪犯; 违法者

Meaning

a person who commits an illegal act; someone who breaks the law

Example

The young offender was sentenced to community service.

那个年轻的罪犯被判社区服务。

B2 noun /ɑːks/

Ox

牛

Meaning

a large strong animal used for pulling heavy loads or plowing fields

Example

The farmer used an ox to plow the field.

农民用牛耕地。

C1 adjective /əbˈstrʌk.tɪv/

Obstructive

阻碍性的

Meaning

deliberately creating difficulties or preventing progress; hindering or blocking something

Example

The obstructive policies hindered economic growth.

这些阻碍性的政策阻碍了经济增长。

B2 verb /əˈpoʊz/

oppose

反对

Meaning

to disagree with or resist; to act against

Example

Many citizens oppose the new tax policy.

许多公民反对新的税收政策。

C1 adjective /ˈɑp.ər.ə.tɪv/

Operative

有效的; 运行中的; 工作中的; 操作性的;

Meaning

Functioning; in effect; working; active;

Example

The new safety protocols became operative immediately after the accident.

新的安全协议在事故发生后立即生效。

A2 adjective/adverb /ˈɒnˌlaɪn/

online

在线

Meaning

connected to or available through the internet

Example

I prefer shopping online rather than going to stores.

我更喜欢网上购物，而不是去商店。

B1 verb /ˈɒpəreɪtɪŋ/

operating

操作

Meaning

to control or manage the functioning of something

Example

The company has been operating in this market for five years.

公司已经在这个市场运营了五年。

A1 adverb /wʌns/

Once

一次; 过去的某个时候

Meaning

one time only; at some time in the past; formerly

Example

I have been to Paris once in my life.

我一生中只去过一次巴黎。

C2 adjective /əbˈtruːsɪv/

obtrusive

干扰的

Meaning

noticeable in an unpleasant or unwelcome way; intrusive

Example

The advertisement was so obtrusive that it ruined the user’s experience.

广告如此显眼，以至于破坏了用户体验。

C2 verb /ˈɑːbvieɪt/

obviate

消除

Meaning

To remove a need or difficulty; to prevent or avoid something.

Example

This new system obviates the need for manual data entry.

这个新系统消除了手动输入数据的需要。

B2 noun /ɔːrˈɡæn.ɪk ˈfɑːr.mɪŋ/

organic farming

有机农业

Meaning

Farming method that avoids synthetic chemicals and fertilizers, using natural methods instead.

Example

Organic farming improves soil health and reduces pollution.

有机农业改善了土壤健康并减少了污染。

B2 verb /əˈblaɪdʒ/

oblige

迫使

Meaning

to compel or require someone to do something; to help or do a favor

Example

I would be happy to oblige you with the information you need.

我很乐意为你提供所需的信息。

C1 adjective /ˈaʊt.kɑːst/

Outcast

被排斥的人

Meaning

rejected by society; excluded person

Example

He felt like an outcast in his new school.

他在新学校里感觉自己像一个被排斥的人。

B2 noun/verb /ˈoʊvərˌdoʊs/

overdose

过量服药

Meaning

An excessive and dangerous amount of a drug; to take too much of a substance.

Example

He was rushed to the hospital after a drug overdose.

他因毒品过量被送进了医院。

C2 adjective /ˌoʊvərˈwiːnɪŋ/

overweening

过度自负

Meaning

excessively arrogant or prideful

Example

His overweening pride cost him many friends.

他过度的自豪让他失去了许多朋友。

C1 adjective ˈɒptɪmaɪzd

optimized

优化, 改善, 更有效

Meaning

Made as fully perfect, functional, or effective as possible; improved to achieve maximum efficiency.

Example

The system has been optimized for faster performance.

系统已经针对更快的性能进行了优化。

C2 noun /oʊf/

Oaf

笨拙、愚蠢或麻木的人

Meaning

a clumsy, stupid, or insensitive person

Example

Don't be such an oaf - handle the dishes carefully!

不要做那种笨蛋 – 小心洗碗！

A2 noun /ˈʌv.ən/

Oven

烤箱

Meaning

an enclosed compartment used for heating, baking, or drying food

Example

She baked cookies in the oven for thirty minutes.

她在烤箱里烤了三十分钟的饼干。

C1 noun /ˈɔr.ə.tər/

Orator

演说家

Meaning

a public speaker, especially one who is eloquent or skilled in speaking

Example

The famous orator delivered an inspiring speech.

这位著名的演说家发表了一场鼓舞人心的演讲。

B1 noun ˈɒk.sɪ.dʒən

oxygen

氧气。无色、无味的气体，是生命必不可少的成分。

Meaning

A colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air.

Example

Oxygen is vital for life.

氧气对生命至关重要。

C1 noun /ˈɑd.ɪ.ti/

Oddity

奇异现象

Meaning

something that is strange or unusual; a peculiar trait

Example

His habit of sleeping standing up was considered an oddity.

他站着睡觉的习惯被视为一种奇异现象。

B2 noun /ˈɔːɡənɪzəm/

organism

有机体

Meaning

a living thing that has an organized structure and can grow and reproduce

Example

Every organism needs water to survive.

每个有机体都需要水才能生存。

C1 verb /aʊtˈlæst/

outlast

比...持续更久

Meaning

to continue longer than; to endure beyond someone or something else

Example

The old castle has outlasted many generations.

这座古老的城堡已经比许多代人持续得更久。

C1 noun /ɒpˈtɒmɪtrɪst/

optometrist

眼科验光师

Meaning

A healthcare professional who examines eyes and prescribes corrective lenses.

Example

The optometrist prescribed new glasses for her.

眼科验光师为她开了新的眼镜。

C2 adjective /ˈɑːsɪˌfaɪd/

ossified

变成骨头，僵硬

Meaning

Turned into bone or become rigid; unwilling to change.

Example

The company had an ossified management structure that resisted innovation.

该公司有一个僵化的管理结构，抵制创新。

C1 verb /ˈɔːstrəˌsaɪz/

ostracize

排斥

Meaning

to exclude someone from a group or society; to banish or shun

Example

After the scandal, he was ostracized by his former colleagues.

丑闻发生后，他被前同事排斥。

C2 noun /ˈɔɪl.mən/

Oilman

石油商

Meaning

a person who works in the oil industry; someone who sells oil or petroleum products

Example

The oilman discovered a new oil field in the desert.

石油商在沙漠中发现了一个新的油田。

C1 noun /ˈaʊtˌɡroʊθ/

outgrowth

衍生物

Meaning

something that grows out of something else; a natural development or result

Example

The new policy was an outgrowth of years of debate.

新政策是多年辩论的衍生物。

B2 noun /ˈoʊvərpæs/

overpass

立交桥

Meaning

A bridge that carries one road or railway over another.

Example

The new overpass reduced traffic congestion in the city.

新的立交桥减少了城市的交通拥堵。

C1 noun /ˈɔːrθədɑːksi/

orthodoxy

正统

Meaning

traditional or generally accepted beliefs and practices

Example

The religious leader defended the orthodoxy of the faith.

宗教领袖捍卫了信仰的正统性。

C1 adjective /ɔːˈneɪt/

ornate

华丽的

Meaning

elaborately or highly decorated

Example

The palace hall was filled with ornate furniture and paintings.

宫殿的大厅里充满了华丽的家具和画作。

B2 verb /əˈrɪdʒɪneɪt/

originate

起源

Meaning

to come into existence; to begin; to create or produce

Example

The tradition originated in ancient times.

这个传统起源于古代。

C2 noun /ˈɒbsɪkwi/

obsequy

葬礼仪式

Meaning

A funeral rite, usually used in plural form obsequies.

Example

The village gathered for the obsequy of their beloved teacher.

村庄聚集在一起，参加他们心爱的老师的葬礼。

C2 noun /ˌɒpəˈrɛtə/

operetta

轻歌剧

Meaning

a short opera with light and humorous themes

Example

The theater staged a famous operetta by Gilbert and Sullivan.

剧院上演了吉尔伯特与沙利文的著名轻歌剧。

A1 adjective /əʊˈkeɪ/

okay

没问题

Meaning

used to express agreement or acceptance

Example

It's okay to leave early today.

今天早些离开没问题。

B2 noun ˈəʊ.və.hed

overhead

管理费用

Meaning

Ongoing business expenses not directly attributable to creating a product or service.

Example

The company reduced its overhead to increase profits.

公司减少了管理费用以增加利润。

B2 noun /wʌn θɜːd/

one-third

三分之一

Meaning

one part of something that is divided into three equal parts

Example

One-third of the class was absent today.

班级的三分之一今天缺席。

B2 verb /ɒpt/

opt

选择

Meaning

to choose or decide to do something instead of something else

Example

Many students opt to study abroad for better opportunities.

许多学生选择出国留学以获得更好的机会。

C1 adjective /ˌəʊ.vərˈɑː.tʃɪŋ/

overarching

总体, 包容, 全面

Meaning

Comprehensive or all-embracing; forming an arch over something.

Example

The overarching theme of the book is human resilience.

这本书的总体主题是人类的韧性。

A1 adjective /oʊld/

old

旧的

Meaning

having lived for a long time; not new or young

Example

He still drives his old car.

他仍然开着他的旧车。

机会主义者

Meaning

A person who takes advantage of situations for personal gain, often disregarding principles.

Example

He is seen as an opportunist who always puts his interests first.

他被看作是一个机会主义者，总是把自己的利益放在第一位。