C1 adjective /ˌɔːrθəˈpiːdɪk/

orthopedic

与骨骼或肌肉畸形的矫正有关

Meaning

Relating to the correction of deformities of bones or muscles.

Example

She visited an orthopedic surgeon for her back pain.

她因为背痛去看了骨科医生。

B1 noun ˌɔː.ɡən.aɪˈzeɪ.ʃənz

organizations

组织

Meaning

Organized groups of people with a particular purpose

Example

Organizations play a key role in policymaking.

组织在政策制定中发挥着重要作用。

B2 noun /ˈaʊt.laɪn/

Outline

大纲; 轮廓; 摘要

Meaning

a general description or plan showing the essential features of something; the main points

Example

The teacher provided an outline of the course syllabus.

老师提供了课程大纲。

C1 noun /ˈɔːr.ə.tɔːr.i/

oratory

演讲艺术

Meaning

The art of public speaking; skilled and confident delivery of speeches to an audience.

Example

His exceptional oratory skills won him the debate competition.

他出色的演讲技巧使他赢得了辩论比赛。

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。

C1 noun /əbˈstrʌkʃən/

obstruction

障碍

Meaning

Something that blocks or gets in the way; the action of obstructing.

Example

There was an obstruction on the railway track.

铁路上有一个障碍。

C2 adjective /əbˈsiːkwɪəs/

obsequious

奉承

Meaning

Excessively obedient or attentive in a servile way.

Example

The waiter gave an obsequious bow to every customer.

服务员对每个顾客鞠了一躬。

C1 adjective /əˈblɪɡ.ə.tɔː.ri/

obligatory

强制的

Meaning

Required by a legal, moral, or other rule; compulsory.

Example

Wearing a seatbelt is obligatory in most countries.

在大多数国家，系安全带是强制的。

C1 noun /ɔːr/

Oar

桨

Meaning

a long pole with a flat blade used to row a boat

Example

He dipped the oar into the water and pulled the boat forward.

他将桨浸入水中并拉动船向前。

C1 adjective /ˌɒmnɪˈprezənt/

omnipresent

无所不在

Meaning

(of God) present everywhere at the same time.

Example

Social media has become an omnipresent force in modern society.

社交媒体已成为现代社会中无所不在的力量。

B2 noun /ˈaʊtlʊk/

outlook

前景, 预测

Meaning

a person's general attitude or view; a forecast or prospect

Example

The economic outlook for the year is positive.

今年的经济前景是积极的。

C2 verb /ˈɑːbdʒərˌɡeɪt/

objurgate

严厉批评

Meaning

to scold or rebuke severely

Example

The teacher objurgated the student for being dishonest.

老师因为学生不诚实而严厉批评了他。

C1 verb /əˈfɪʃieɪt/

officiate

主持

Meaning

To perform official duties, especially in a ceremony or as a referee.

Example

The priest will officiate the wedding ceremony.

牧师将主持婚礼仪式。

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 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。

B1 adjective /ˈaʊtər/

outer

外部

Meaning

situated on or toward the outside; external

Example

The outer layer of the jacket is waterproof.

夹克的外层是防水的。

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。

C2 adjective /ˈɒkjʊlər/

ocular

眼科的

Meaning

Relating to the eye or vision.

Example

The patient was referred to a specialist for ocular treatment.

患者被转诊到眼科专家进行治疗。

C1 verb /ˌaʊtˈstrɪp/

outstrip

超越

Meaning

To go faster or do better than someone or something; to surpass.

Example

The company outstripped its competitors in sales last year.

公司在去年超越了它的竞争对手。

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。

C1 noun ˌɒk.sɪˈdeɪ.ʃən

oxidation

氧化

Meaning

A chemical reaction that involves the combination of a substance with oxygen, often causing deterioration.

Example

Oxidation causes metal surfaces to weaken.

氧化会削弱金属表面。

B2 adjective /ˌoʊvərˈwɛlmɪŋ/

overwhelming

压倒性的

Meaning

Very intense; overpowering.

Example

Large tasks can feel overwhelming.

大型任务可能会让人感到压倒。

C2 noun /əˈprəʊ.bri.əm/

opprobrium

耻辱, 侮辱

Meaning

Harsh criticism or public disgrace.

Example

The scandal brought opprobrium on the politician.

丑闻给政治家带来了耻辱。

B2 noun /əˈfens/

Offence

罪行; 侵犯法规

Meaning

a breach of law or rule; an annoyance or resentment

Example

Stealing is a serious offence punishable by law.

盗窃是严重的罪行，依法可追究。

B2 noun /ˈɒkjʊpənt/

occupant

乘客

Meaning

A person who resides in or is present in a house, vehicle, seat, or place.

Example

The car had three occupants at the time of the accident.

事故发生时，车上有三名乘客。

C1 noun /əbˈdʒɛktər/

objector

反对者

Meaning

a person who expresses opposition or disapproval to something

Example

The objector raised his concerns during the town meeting.

反对者在市议会会议中表达了他的关切。

C2 noun /ˈɑːbəlɪsk/

obelisk

方尖碑

Meaning

A tall, four-sided, narrow tapering monument with a pyramid-shaped top.

Example

The ancient Egyptians built obelisks to honor their gods.

古埃及人建造了方尖碑来纪念他们的神。

B2 noun /ɒpˈtɪʃən/

optician

眼镜师

Meaning

A person who makes or sells glasses and contact lenses.

Example

The optician adjusted my new glasses to fit better.

眼镜师调整了我的新眼镜，以便更好地适应。

C1 verb /aʊtˈwɪt/

outwit

智胜

Meaning

to defeat or gain an advantage over someone by being more clever or cunning

Example

The fox managed to outwit the hunters.

狐狸成功地智胜了猎人。

C1 adjective /ˌaʊt ən ˈaʊt/

out-and-out

完全

Meaning

complete; absolute; used to emphasize something extreme

Example

The speech was an out-and-out lie.

这个演讲是一个完全的谎言。

C2 adjective /əˈrækjələr/

oracular

神谕的

Meaning

Resembling an oracle; giving wise, mysterious, or prophetic statements

Example

Her oracular words left the audience deep in thought.

她的神谕般的话让观众陷入了深思。

C1 verb /ˌoʊvərˈrʌn/

overrun

侵占

Meaning

to spread over or occupy completely; to exceed a limit or time

Example

The garden was overrun with weeds.

花园被杂草淹没。

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 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。

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 /ˌɒk.sɪ.dʒɪˈneɪ.ʃən/

oxygenation

供氧或氧气治疗

Meaning

The process of supplying or treating with oxygen.

Example

Deep breathing exercises improve oxygenation of the body.

深呼吸练习有助于改善身体的供氧。

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。

A1 adjective /ˈɔːr.ɪndʒ/

Orange

橙色

Meaning

having a color between red and yellow like that of a ripe orange fruit

Example

The orange sunset painted the sky magnificently.

橙色的日落把天空画得非常壮丽。

B2 noun /ˈɒs.trɪtʃ/

Ostrich

鸵鸟

Meaning

a large flightless bird native to Africa with long legs and neck

Example

The ostrich is the world's largest bird.

鸵鸟是世界上最大的鸟。

B2 noun /ˈaʊtˌskɜːrt/

outskirt

城市郊区

Meaning

the outer edge or border of a town or city

Example

They built a new factory on the outskirts of the city.

他们在城市郊区建了一家新工厂。

A2 noun /ˈoʊpənɪŋ/

opening

开幕

Meaning

an act or instance of beginning something

Example

The opening of the new store was a huge success.

新店的开业是一个巨大的成功。

C2 verb /əˈkluːd/

occlude

堵塞

Meaning

To block or close up an opening or passage.

Example

The pipe was occluded by mineral deposits.

管道因矿物沉积物而被堵塞。

C2 noun /əbˈstɛtrɪks/

obstetrics

产科

Meaning

The branch of medicine dealing with childbirth and care of women giving birth.

Example

She is studying obstetrics to become a specialist in childbirth.

她正在学习产科，想成为一名分娩专家。

C2 noun /ˈoʊ.vər.let/

Overlet

床垫

Meaning

a thin mattress or pad placed over a bed for additional comfort

Example

The overlet makes the bed more comfortable to sleep on.

欧弗雷特使床铺更适合睡觉。

B2 verb /ˌoʊvərˈlʊk/

overlook

忽略

Meaning

to fail to notice or consider something; to have a view from above

Example

It's easy to overlook small details when you're in a hurry.

当你赶时间时，很容易忽略小细节。

C1 noun /ˈɒptɪks/

optics

光学

Meaning

The branch of physics dealing with light and vision.

Example

She studied optics to understand how lenses work.

她学习了光学，以了解镜头是如何工作的。

A2 noun /ˈoʊ.ʃən/

ocean

海洋

Meaning

A very large expanse of sea, especially the main areas of sea between continents.

Example

The ocean covers more than 70% of the Earth's surface.

海洋覆盖了地球表面超过70%。

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。

C1 adjective /ˈɒm.ɪ.nəs/

Ominous

不祥的; 威胁的

Meaning

giving the impression that something bad will happen; threatening; foreboding

Example

The dark clouds looked ominous before the storm.

暴风雨前，黑云看起来预示着灾难。

B2 noun /ˈɔːɡən/

organ

器官

Meaning

a part of the body that performs a specific function

Example

The heart is an important organ in the human body.

心脏是人体重要的器官。

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。

C2 noun /ˌɔːrəˈtɔːri.oʊ/

oratorio

宗教音乐作品

Meaning

A large-scale musical composition for orchestra, choir, and soloists, usually on a sacred theme, performed without costumes or scenery.

Example

Handel's 'Messiah' is one of the most famous oratorios ever written.

亨德尔的《弥赛亚》是最著名的宗教音乐作品之一。

C2 adjective /ˌɔːfˈkiː/

off-key

跑调

Meaning

out of tune; not in accordance with expected standards

Example

The singer was slightly off-key during the performance.

歌手在表演时稍微跑调了。

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。

A1 adjective /oʊˈkeɪ/

ok

好的

Meaning

used to indicate agreement, approval, or understanding

Example

Okay, let's go to the park.

好的，我们去公园。

B2 verb /ˌoʊvərˈsiː/

oversee

监督

Meaning

to supervise or watch over something; to manage and direct

Example

The manager will oversee the entire construction project.

经理将监督整个建筑项目。

C1 noun ɔːrˈdiːl

ordeal

艰难的考验

Meaning

A physical or mental painful experience that must be endured

Example

Surviving the wilderness was a tough ordeal for them.

在野外生存对他们来说是一场艰难的考验。

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 noun /ˈɑb.lə.kwi/

Obloquy

严厉的批评或言语侮辱；公开谴责

Meaning

harsh criticism or verbal abuse; strong public condemnation

Example

The politician faced obloquy after the scandal.

政治家在丑闻之后遭遇了严厉的批评。

B1 verb /əˈkɜːr/

occur

发生

Meaning

to happen or take place; to be found or present

Example

The accident occurred at the intersection during rush hour.

事故发生在高峰时段的交叉口。

B1 adjective /əˈrɪdʒ.ɪ.nəl/

Original

原始的; 主要的; 真实的

Meaning

first; fundamental; primary; authentic

Example

This is the original document, not a copy.

这是原始文件，不是副本。

C2 noun /oʊˈbeɪsəns/

obeisance

敬礼

Meaning

A gesture of respect such as a bow or curtsy.

Example

They bowed in obeisance to the king.

他们向国王行了敬礼。

C1 noun /ɒpˈtɒmətri/

optometry

验光学

Meaning

The practice or profession of examining the eyes and prescribing corrective lenses.

Example

She studied optometry at the university to become an eye specialist.

她在大学学习验光学，成为一名眼科专家。

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。

C2 verb /oʊˈpaɪn/

opine

表达意见

Meaning

to express an opinion or belief

Example

The professor opined that the policy would fail.

教授认为政策会失败。

B2 verb /ˌoʊvərˈtɜrn/

overturn

推翻 / 取消裁决

Meaning

to turn something upside down or to reverse a decision or judgment

Example

The court decided to overturn the previous ruling.

法院决定推翻先前的裁决。

B2 adjective /ˈɔː.rəl/

Oral

口头的；与嘴巴相关的

Meaning

spoken rather than written; relating to the mouth

Example

The oral examination will test your speaking skills.

口头考试将测试你的口语技能。

B2 noun /ˈaʊtlet/

outlet

出口

Meaning

a means by which something is released, expressed, or distributed

Example

Art is a great outlet for emotions.

艺术是情感的一个极好的出口。

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。

C2 adjective /ˈɔːrnəri/

ornery

脾气暴躁的

Meaning

bad-tempered and combative; stubborn

Example

The ornery old man refused to leave his chair.

那个脾气暴躁的老头拒绝离开他的椅子。

C2 adjective /ˌoʊpəˈlɛsənt/

opalescent

欧泊色的

Meaning

showing or reflecting a milky, iridescent light like an opal

Example

The opalescent sky glowed with shades of pink and blue.

欧泊色的天空闪烁着粉色和蓝色的色调。

B2 noun /ˈɔr.fən.ɪʒ/

Orphanage

孤儿院

Meaning

an institution for the care and education of children who have lost their parents

Example

The charity built a new orphanage for homeless children.

慈善机构为无家可归的孩子建了一个新孤儿院。

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。

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。

B2 adjective + noun ˈɒptɪməl ˈtempərətʃər

optimal temperature

最佳温度

Meaning

The best or most favorable temperature for a particular purpose

Example

Winter provides optimal temperature for farming.

冬天提供了农业的最佳温度。

C1 noun /ˈoʊvərˌsiːər/

overseer

监督员

Meaning

a person who supervises work or workers; a manager

Example

The overseer made sure the workers followed safety rules.

监督员确保工人遵守安全规则。

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。

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 /ˌoʊvərprəˈdʌkʃən/

overproduction

过度生产

Meaning

The act of producing more of something than is needed or can be consumed.

Example

The economic crisis was caused by the overproduction of goods.

经济危机是由商品的过度生产引起的。

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。

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！

B2 adjective; verb (past participle) /ˈɒkjʊpaɪd/

occupied

被占用的；被占领的

Meaning

being in use or taken; filled or lived in; controlled or held by force

Example

The room is occupied, so please wait outside.

房间被占用，请在外面等候。

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 /ˈɒf.biːt/

offbeat

不寻常

Meaning

Unusual, unconventional, or different from the norm.

Example

She has a very offbeat sense of humor.

她有非常不寻常的幽默感。

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。

C2 noun /ˈoʊ.kəm/

oakum

旧绳纤维

Meaning

loose fibers obtained by untwisting old ropes, used for caulking ships

Example

The shipbuilders used oakum to seal the gaps in the wooden planks.

造船工人使用欧卡姆来密封木板之间的缝隙。

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。

C2 noun /ɒkˈteɪvoʊ/

octavo

八开 (通过将纸张折叠成八个部分而产生的书籍大小)

Meaning

A size of book page resulting from folding a sheet of paper into eight leaves (sixteen pages).

Example

The old library contained rare octavo editions of Shakespeare.

这座古老的图书馆里有莎士比亚的稀有八开版书籍。

C2 adjective /ɔːrˈθɑːɡənl/

orthogonal

正交

Meaning

at right angles; independent or unrelated

Example

In mathematics, two vectors are orthogonal if their dot product is zero.

在数学中，如果两个向量的点积为零，它们就是正交的。

A2 adverb /ˈɒbviəsli/

obviously

显然

Meaning

in a way that is easily perceived or understood; clearly

Example

Obviously, he didn’t read the instructions.

显然，他没有读说明书。

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。

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。

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。

A2 adjective /ˈɒb.vi.əs/

Obvious

显而易见的; 容易理解的

Meaning

easily perceived or understood; clear and apparent to the mind

Example

It was obvious that she was upset about something.

很明显，她因某事而不高兴。

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。

C1 adjective əˈblɪv.i.əs

oblivious

无意识的

Meaning

Being completely unaware of surrounding events.

Example

He was oblivious to the noise around him while reading.

他在阅读时完全没有意识到周围的噪音。

C1 adjective /əbˈdʒek.ʃən.ə.bəl/

Objectionable

令人反感的

Meaning

arousing distaste or opposition; unpleasant or offensive

Example

His objectionable behavior made everyone uncomfortable.

他的令人反感的行为让每个人都感到不舒服。

B2 adjective ˌɒp.ərˈeɪ.ʃən.əl

operational

操作的

Meaning

In working order; ready for use.

Example

The space project will be operational by 2025.

太空项目将在2025年投入使用。

C1 noun /ˌɒbstəˈtrɪʃən/

obstetrician

产科医生

Meaning

A doctor specializing in pregnancy, childbirth, and women's reproductive health.

Example

The obstetrician monitored the mother’s health throughout the pregnancy.

产科医生在整个怀孕过程中监测了母亲的健康。

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。

B2 noun /ˌaʊtˈsaɪdə(r)/

outsider

局外人

Meaning

a person who is not accepted as a member of a particular group or community

Example

As a new student, she often felt like an outsider at school.

作为新生，她常常觉得自己在学校是个局外人。

C1 adjective ˈɒk.sɪ.də.tɪv

oxidative

与氧化相关

Meaning

Related to or caused by oxidation, especially cellular damage from free radicals.

Example

Excess stress can lead to oxidative damage in cells.

过度的压力可能导致细胞中的氧化损伤。

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。

B2 noun /ˈoʊ.dər/

Odour

气味

Meaning

a distinctive smell, especially an unpleasant one

Example

The odour of fresh bread filled the kitchen.

新鲜面包的气味充满了厨房。

C1 adjective /əbˈtjuːs/

Obtuse

迟钝的; 愚笨的; 理解慢

Meaning

annoyingly insensitive or slow to understand; lacking in intelligence or perception

Example

He was being deliberately obtuse about the instructions.

他故意在指令上表现得迟钝。

B2 adjective /ˌɑːp.təˈmɪs.tɪk/

optimistic

乐观的

Meaning

hopeful and confident about the future

Example

She is optimistic about the success of her new project.

她对新项目的成功持乐观态度。

B2 noun /ˌoʊ.vɚˈkraʊ.dɪŋ/

overcrowding

过度拥挤

Meaning

Excessive crowd or packed condition, having more people or vehicles in a place than the approved capacity.

Example

The subway system suffers from severe overcrowding during peak hours.

地铁系统在高峰时段面临严重的过度拥挤。

B2 noun oʊˈbiː.sə.t̬i

obesity

肥胖症

Meaning

The condition of being grossly fat or overweight.

Example

Obesity increases the risk of diabetes and heart disease.

肥胖症增加糖尿病和心脏病的风险。

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 /aʊst/

oust

驱逐

Meaning

To remove someone from a position or place of power or authority.

Example

The rebels ousted the dictator from power.

叛乱者将独裁者赶下台。

外包

Meaning

The practice of having certain job functions done outside a company instead of having an in-house department or employee handle them.

Example

Many companies use outsourcing to reduce labor costs.

许多公司使用外包来降低劳动力成本。