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C1 adjective /koʊˈɪnsɪdənt/

coincident

同时
Meaning
Occurring at the same time; occupying the same position in space or time.
Example
The festival was coincident with the national holiday.
节日与国庆假日是同时发生的。
C1 noun /ɔːˈdæs.ə.ti/

audacity

胆量
Meaning
The willingness to take bold risks; boldness or fearlessness.
Example
His audacity to question authority was admirable.
他质疑权威的胆量令人钦佩。
C1 adjective /ˈrɪvɪtɪŋ/

riveting

引人入胜
Meaning
extremely interesting; holding the complete attention
Example
The movie was so riveting that nobody looked away.
这部电影如此引人入胜，以至于没有人移开视线。
C1 noun, verb /klɒt/

clot

血块
Meaning
a thick mass of coagulated liquid, especially blood; to form such a mass.
Example
The doctor removed a blood clot from the patient.
医生从病人身上取出了血块。
C1 verb /snɪər/

sneer

嘲笑
Meaning
to smile or speak in a mocking or contemptuous way
Example
She sneered at his attempt to sing.
她嘲笑他的唱歌尝试。
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。
C1 noun /ˈeɪ.kər.ɪdʒ/

acreage

英亩
Meaning
An area of land measured in acres.
Example
The farmer owns a large acreage of fertile land.
农民拥有一大片肥沃的英亩土地。
C1 noun /ˈɪntrɪkəsi/

intricacy

复杂性
Meaning
the quality of being very detailed or complicated
Example
The intricacy of the design impressed everyone.
设计的复杂性给每个人留下了深刻印象。
C1 noun /ˈtrɛtʃəri/

treachery

背叛
Meaning
Betrayal of trust; deceptive action or nature.
Example
His treachery was revealed when he sided with the enemy.
当他站在敌人一方时，他的背叛被揭露了。
C1 noun /ˈboʊ.ə/

Boa

蟒蛇
Meaning
a large non-venomous snake that kills prey by constriction
Example
The boa constrictor wrapped around its prey.
波阿蛇缠绕着它的猎物。
C1 adjective /ɪmˈpæsɪv/

impassive

冷漠
Meaning
Not showing or feeling emotion; expressionless.
Example
Despite the shocking news, she remained impassive.
尽管有令人震惊的消息，她依然无动于衷。
C1 verb /blɜːrt/

blurt

突然说出
Meaning
to say something suddenly without thinking
Example
He blurts out the secret accidentally.
他不小心说出了秘密。
C1 noun /blɜːrb/

blurb

宣传描述
Meaning
a short promotional description of a book, product, or service
Example
The back cover had a blurb praising the novel.
封底有一段宣传描述，赞扬这本小说。
C1 noun /ˈɪrɪtənt/

irritant

刺激物
Meaning
something that causes irritation or discomfort
Example
Dust is a common irritant for people with allergies.
灰尘是过敏者常见的刺激物。
C1 adjective /ˈneɪm.ləs/

Nameless

无名的; 匿名的; 不知名的; 未识别的
Meaning
having no name; anonymous; unknown; unidentified
Example
The nameless fear haunted him throughout the night.
无名的恐惧整晚困扰着他。
C1 noun /bɒɡ/

bog

沼泽
Meaning
an area of wet, spongy ground; a swamp or marsh
Example
The hikers got stuck in a bog.
徒步旅行者陷入了一个沼泽。
C1 noun /ˈblʌd.ʃed/

Bloodshed

流血; 屠杀
Meaning
the killing or wounding of people, typically in large numbers during a conflict
Example
The peace treaty was signed to prevent further bloodshed.
和平条约被签署，以防止进一步的流血。
C1 verb /ɪnˈlaɪvən/

enliven

使生动
Meaning
to make something more lively, interesting, or cheerful
Example
Her jokes helped enliven the dull meeting.
她的笑话帮助让枯燥的会议变得生动。
C1 noun /mɔːˈtæləti/

mortality

死亡率
Meaning
the state of being subject to death; the death rate of a population
Example
Advancements in medicine have reduced child mortality significantly.
医学的进步显著降低了婴儿死亡率。
C1 noun /diːˈkrɪp.ʃən/

decryption

解密
Meaning
The process of converting encrypted data back into its original form so it can be understood.
Example
Hackers attempted decryption of classified data.
黑客试图解密机密数据。
C1 adjective ˈriːdʒən spəˈsɪfɪk

region-specific

区域特定
Meaning
Relating to or characteristic of a particular region or area.
Example
Climate change impacts are region-specific.
气候变化的影响是区域特定的。
C1 noun /ˌnɑm.əˈni/

Nominee

提名人
Meaning
a person who is nominated for an office, award, or honor
Example
She was the nominee for the Best Actress award.
她是最佳女演员奖项的提名人。
C1 noun /ˈskaɪ.lɑːrk/

Sky-Lark

云雀
Meaning
a small brown bird known for singing while flying high in the sky
Example
The skylark sang beautifully as it soared above the meadow.
当云雀飞翔在草地上方时，它美丽地歌唱。
C1 adjective /ˈblʌdləs/

bloodless

无血
Meaning
without bloodshed; lacking violence or vitality
Example
The revolution was surprisingly bloodless.
这场革命出奇地没有流血。
C1 noun /pəˈræl.ə.sɪs/

Paralysis

瘫痪
Meaning
the loss of the ability to move part or all of the body; complete inability to act or function
Example
The accident left him with paralysis in his legs.
事故使他双腿瘫痪。
C1 noun /krʌks/

crux

关键
Meaning
the most important or decisive point of an issue
Example
The crux of the problem lies in poor communication.
问题的关键在于沟通不畅。
C1 noun /ˈfɔːrsəm/

foursome

四人组
Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
四人组一起享受了一场高尔夫比赛。
C1 noun /nɒb/

Knob

门或抽屉上的圆形把手; 机器上的小圆形开关
Meaning
a rounded handle on a door or drawer; a small rounded switch on a machine
Example
He turned the brass knob to open the old wooden door.
他转动铜制的门把手，打开了那扇旧木门。
C1 noun /ʃɑːrd/

shard

碎片
Meaning
a broken piece of glass, metal, or pottery
Example
He cut his finger on a shard of glass.
他用玻璃碎片割伤了手指。
C1 noun /ɪmˈpɜːrtɪnəns/

impertinence

无礼
Meaning
lack of respect; rudeness
Example
The teacher was shocked by the student's impertinence.
老师对学生的无礼感到震惊。
C1 adjective /ɪkˈspiːdiənt/

expedient

权宜之计
Meaning
suitable or convenient for achieving a particular end, sometimes at the expense of morality
Example
It was expedient to take the shortcut despite the risks.
尽管有风险，走捷径是权宜之计。
C1 verb /sərˈmaɪz/

surmise

推测
Meaning
to suppose something is true without having evidence
Example
She surmised that he was not coming to the meeting.
她推测他不会来参加会议。
C1 adjective ʌnˈpær.ə.leld

Unparalleled

无与伦比
Meaning
Having no equal; unmatched, peerless, and supreme in quality or achievement.
Example
The unparalleled beauty of the Taj Mahal amazes visitors.
泰姬陵无与伦比的美丽使游客惊叹。
C1 adjective ɪnˈkʌm.bənt

incumbent

有义务的
Meaning
necessary for (someone) as a duty or responsibility.
Example
It is incumbent upon all citizens to obey the law.
所有公民都有义务遵守法律。
C1 noun /ˌpærəˈnɔɪə/

paranoia

一种不合理且持续的感觉，认为别人想要伤害你或一直在监视你
Meaning
an irrational and persistent feeling that people are 'out to get you' or are constantly watching you
Example
His constant paranoia made it hard for him to trust anyone.
他不断的偏执让他很难信任任何人。
C1 adjective /ɑːrˈkeɪn/

arcane

深奥的
Meaning
understood by few; mysterious or secret
Example
The professor’s lecture was full of arcane details that only specialists could follow.
教授的讲座充满了只有专家才能理解的深奥细节。
C1 noun ˌvɛn.əˈreɪ.ʃən

veneration

崇敬
Meaning
Great respect; reverence; the action of regarding with great respect or reverence.
Example
Many cultures show veneration for their ancestors.
许多文化表现出对祖先的崇敬。
C1 noun /ˈdæɡ.ər/

Dagger

匕首
Meaning
a short knife with a pointed blade used as a weapon
Example
The ancient warrior carried a silver dagger.
古代战士携带着一把银色匕首。
C1 adjective, noun /ˈpæstərəl/

pastoral

乡村的，与牧羊人相关
Meaning
relating to the countryside, shepherds, or rural life; also relating to spiritual guidance by a pastor
Example
The painting had a calm pastoral scene with sheep grazing.
这幅画展示了一个安静的田园场景，羊群在吃草。
C1 noun ˈmæŋɡroʊv ˈfɒrɪst

Mangrove Forest

红树林
Meaning
A coastal forest ecosystem characterized by salt-tolerant trees and shrubs that grow in intertidal zones.
Example
Sundarbans is the world's largest mangrove forest.
孙达班是世界上最大的红树林。
C1 adjective /kwɪər/

Queer

奇怪的; 不寻常的; 特殊的
Meaning
strange; unusual; peculiar; odd
Example
The old house had a queer atmosphere that made visitors uncomfortable.
这座老房子有一种奇怪的气氛，让访客感到不舒服。
C1 verb /ˈpeɪtrənaɪz/

patronize

屈尊俯就
Meaning
to treat someone in a condescending way; to be a regular customer of a business
Example
Don't patronize me with your fake sympathy.
不要用你虚假的同情来屈尊俯就我。
C1 adjective /ˌʌnəkˈnɒlɪdʒd/

unacknowledged

未承认的
Meaning
Not recognized, admitted, or accepted; ignored or unnoticed
Example
Her contributions to the project went unacknowledged.
她对项目的贡献未被承认。
C1 verb /hiːd/

heed

注意
Meaning
to pay attention to; to take notice of
Example
You should heed the teacher's advice.
你应该听从老师的建议。
C1 verb /ˈbɒɡəl/

boggle

使迷惑
Meaning
to overwhelm or confuse; to be astonished or puzzled by something
Example
The complexity of the puzzle boggled his mind.
这个谜题的复杂性让他的头脑感到困惑。
C1 noun /səˈnɑːtə/

sonata

音乐作品 (奏鸣曲)
Meaning
A musical composition for one or more instruments, typically in several movements.
Example
She performed a beautiful Beethoven sonata on the piano.
她在钢琴上演奏了贝多芬的美丽奏鸣曲。
C1 noun /ˈfɛtɪʃ/

fetish

过度或不理智的痴迷
Meaning
an excessive or irrational devotion to something
Example
He has a fetish for collecting rare stamps.
他对收集稀有邮票有着一种痴迷。
C1 noun /nɑːrˈkɒtɪk/

narcotic

麻醉品
Meaning
A drug that dulls the senses and relieves pain, often causing sleep and sometimes addiction.
Example
The police seized a large amount of narcotic substances.
警察查获了一大批麻醉品。
C1 verb /flɪntʃ/

flinch

退缩
Meaning
to suddenly move back or away due to fear or pain
Example
He didn’t flinch when the doctor gave him the injection.
他在医生给他打针时没有退缩。
C1 noun /ˈæptɪˌtjuːd/

aptitude

能力
Meaning
a natural ability or talent to do something well
Example
She has a strong aptitude for learning new languages.
她在学习新语言方面有很强的能力。
C1 noun /ˌmiːdɪˈeɪʃən/

mediation

调解
Meaning
Intervention between parties to promote reconciliation, settlement, or compromise.
Example
The mediation helped resolve the conflict between the two teams.
调解帮助解决了两队之间的冲突。
C1 verb /daɪˈɡrɛs/

digress

Meaning
To leave the main subject temporarily in speech or writing.
Example
The professor began to digress from the main topic of the lecture.
C1 noun /ˈæmpɛər/

ampere

安培
Meaning
A unit of electric current in the International System of Units (SI), symbolized as A.
Example
The current flowing through the wire is measured in amperes.
流经电线的电流以安培为单位进行测量。
C1 noun /riːk/

Reek

有臭味; 给人强烈的不愉快或不想要的印象
Meaning
to have a very unpleasant smell; to give a strong impression of something unpleasant or undesirable
Example
The garbage can reeks of rotten food.
垃圾桶有腐烂食物的臭味。
C1 adjective /rɪˈsɪ.prə.kəl/

Reciprocal

互惠的; 相互的; 两方共同分享;
Meaning
given or done in return; mutual; shared equally by both parties;
Example
The two countries have a reciprocal trade agreement.
这两个国家有一个互惠的贸易协议。
C1 adjective /ˌpæn.əˈmer.ɪ.kən/

Pan-American

泛美洲的
Meaning
relating to all the countries of North, Central, and South America
Example
The Pan-American Games bring together athletes from across the continent.
泛美洲运动会将整个大陆的运动员汇聚在一起。
C1 adjective /ˈplaɪəbəl/

pliable

柔韧的
Meaning
easily bent or flexible; adaptable
Example
The metal is pliable enough to be shaped into jewelry.
金属足够柔韧，可以被塑造成珠宝。
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。
C1 adverb /əˈraɪ/

awry

出错
Meaning
away from the expected or proper direction; wrong or amiss
Example
The plan went awry when the weather suddenly changed.
计划在天气突然变化时出了问题。
C1 verb /rɪˈnaʊns/

renounce

放弃
Meaning
to formally declare rejection of something, such as a claim, belief, or way of life
Example
She renounced her citizenship to move abroad permanently.
她放弃了国籍以便永久定居国外。
C1 adjective /ˌʌnrɪˈkwaɪtɪd/

unrequited

Meaning
Not returned or reciprocated, especially in the context of love or affection.
Example
He suffered from unrequited love for years.
C1 noun /ˈdʒɑːr.ɡən/

jargon

行话
Meaning
Specialized or technical language used by a particular group or profession.
Example
The lawyer’s explanation was full of legal jargon.
律师的解释充满了法律行话。
C1 verb /vaɪ/

vie

争夺
Meaning
To compete eagerly with someone in order to do or achieve something.
Example
Several companies are vying for the contract.
几家公司正在争夺合同。
C1 verb /ˌriːɪnˈsteɪt/

reinstate

恢复
Meaning
To restore someone or something to their former position or condition.
Example
The company decided to reinstate the suspended employee.
公司决定恢复被停职的员工。
C1 noun /tɪf/

tiff

争执
Meaning
a small or petty quarrel or argument
Example
They had a little tiff over what movie to watch.
他们因为选哪部电影而发生了小争执。
C1 noun ˈtɑksɪk ɪˈmɪʃənz

toxic emissions

有毒排放
Meaning
Harmful or poisonous substances released into the environment, especially the atmosphere.
Example
Toxic emissions from vehicles pollute the atmosphere.
车辆的有毒排放污染了大气。
C1 adjective /ɪkˈsaɪtəbl̩/

excitable

易激动的
Meaning
easily excited or emotionally aroused
Example
The child was excitable and laughed at every small thing.
这个孩子很容易激动，对每个小事都笑。
C1 adjective /ˌkɒnvəˈlɛsnt/

convalescent

恢复中的，正在从疾病或治疗中恢复
Meaning
recovering from an illness or medical treatment
Example
The hospital has a special ward for convalescent patients.
医院有一个特别的病房，供恢复中的病人使用。
C1 adverb /ˈaʊtwədli/

Outwardly

表面上; 外观上;
Meaning
on the surface; externally; in appearance
Example
Outwardly, he seemed calm, but inside he was nervous.
表面上，他看起来很冷静，但内心却很紧张。
C1 verb /mɔːl/

maul

伤害
Meaning
To wound or injure someone by scratching or tearing; to handle roughly.
Example
The bear mauled the camper in the forest.
那只熊在森林里伤害了露营者。
C1 noun /deɪˈbɑː.kəl/

debacle

灾难
Meaning
A sudden and ignominious failure; a fiasco.
Example
The company's poor management led to a financial debacle.
公司的糟糕管理导致了财政灾难。
C1 noun /ˈɛmbləm/

emblem

象征
Meaning
A symbolic object, design, or figure representing an idea, group, or identity.
Example
The dove is an emblem of peace.
鸽子是和平的象征。
C1 adjective /ˌdɪfəˈrɛnʃəl/

differential

差异的
Meaning
Relating to or showing a difference; involving a distinction.
Example
There is a differential treatment between the two groups.
这两个群体之间存在差异待遇。
C1 noun /ˈseɪɑːns/

seance

灵媒会议
Meaning
A meeting where people attempt to communicate with the spirits of the dead.
Example
They held a seance to contact their late grandmother.
他们举行了灵媒会议，以联系已故的祖母。
C1 verb /ˈɡlɔːrɪfaɪ/

glorify

美化
Meaning
to praise or honor someone or something; to make something seem better than it is
Example
The movie glorifies war heroes.
电影美化了战争英雄。
C1 adverb /əˈkjuːtli/

acutely

敏锐地
Meaning
in a sharp, intense, or severe way; with keen awareness
Example
She was acutely aware of the risks involved.
她敏锐地意识到其中的风险。
C1 verb /ɪˈleɪt/

elate

使高兴
Meaning
To make someone very happy or proud.
Example
The success of the project elated the whole team.
项目的成功让整个团队都感到非常高兴。
C1 verb /əbˈzɒlv/

absolve

赦免
Meaning
to free someone from blame, guilt, or responsibility; to pardon
Example
The priest absolved him of his sins.
牧师赦免了他所有的罪。
C1 adjective /kɜːrt/

curt

简短
Meaning
Rudely brief in speech or manner.
Example
His curt reply made everyone uncomfortable.
他的简短回答让每个人都感到不舒服。
C1 adjective /mʌnˈdeɪn/

mundane

平凡
Meaning
lacking interest or excitement; dull and ordinary
Example
She tried to escape her mundane routine by traveling.
她试图通过旅行逃避她平凡的日常。
C1 noun /ˈdɪsɪdənt/

dissident

异见者
Meaning
A person who opposes official policy, especially that of an authoritarian state.
Example
The dissident was arrested for speaking against the government.
异见者因反对政府而被逮捕。
C1 noun /rʌk/

Ruck

推搡; 混乱的人群
Meaning
a situation where a crowd of people are pushing against each other; a disorderly crowd
Example
There was a ruck at the football match.
足球比赛中发生了推搡。
C1 noun /ˌɪntərˈmiːdiˌɛri/

intermediary

中介
Meaning
A person who acts as a link between people in order to try to bring about an agreement; a mediator.
Example
The diplomat served as an intermediary between the two conflicting nations.
外交官作为两国冲突中的中介起到了作用。
C1 noun /ˈziːnɪθ/

zenith

天顶
Meaning
The time at which something is most powerful or successful; the highest point.
Example
Her career reached its zenith in the late 1990s.
她的事业在1990年代末达到了天顶。
C1 noun ˌmɪs.kənˈsɛp.ʃən

misconception

误解
Meaning
A wrong idea or false understanding about something.
Example
There is a common misconception that success happens overnight.
有一个常见的误解，认为成功是一天之内发生的。
C1 adjective /rɪˈstreɪnd/

restrained

克制的
Meaning
characterized by reserve or self-control; held back
Example
Her restrained reaction surprised everyone.
她克制的反应让所有人都感到惊讶。
C1 adjective /ɪnˈedəbəl/

Inedible

不可食用
Meaning
not suitable or safe for eating; not edible
Example
The mushrooms were poisonous and completely inedible.
蘑菇是有毒的，完全不可食用。
C1 verb /hjuːˈmɪlieɪt/

humiliate

侮辱
Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
他因公共失败而感到羞辱。
C1 noun /ˈpɑːr.keɪ/

parquet

木质地板
Meaning
A floor made of wooden blocks arranged in a geometric pattern.
Example
The old mansion had a beautiful parquet floor.
那座古老的豪宅有一块漂亮的木质地板。
C1 noun /ˌænɛkˈseɪʃən/

annexation

吞并
Meaning
the act of adding or taking control of territory or property, especially by a state
Example
The annexation of the region led to international condemnation.
该地区的吞并引发了国际谴责。
C1 verb /weɪd/

wade

涉水而行
Meaning
to walk through water or another substance that impedes movement
Example
The children waded in the shallow river.
孩子们在浅水河中行走。
C1 adjective /ˈkræfti/

crafty

狡猾的, 精明的, 狡诈的
Meaning
skilled at achieving goals through cunning or deceit; sly
Example
The crafty fox evaded the hunters again.
狡猾的狐狸再次躲过了猎人的追捕。
C1 verb /skwiːl/

squeal

尖叫
Meaning
to make a high-pitched cry; to inform on someone
Example
The children squealed with delight when they saw the surprise.
孩子们看到惊喜时高兴地尖叫。
C1 adjective /ˈteɪn.tɪd/

Tainted

污染的; 玷污的
Meaning
contaminated or affected by something bad or undesirable
Example
The water supply was tainted with harmful chemicals.
水供应被有害的化学物质污染了。
C1 noun /ˈnɛktəriːn/

nectarine

油桃 (一种光滑皮肤的桃子品种)
Meaning
A smooth-skinned variety of peach.
Example
She bought a basket of fresh nectarines from the market.
她从市场上买了一篮子新鲜的油桃。
C1 adjective /ˌkævəˈlɪər/

cavalier

漫不经心
Meaning
showing a lack of proper concern; dismissive or offhand
Example
He had a cavalier attitude toward safety regulations.
他对安全规定有一种漫不经心的态度。
C1 noun, verb /buːz/

booze

酒
Meaning
alcoholic drink, especially strong liquor; to drink alcohol, often excessively
Example
They bought some booze for the party.
他们为派对买了酒。
C1 noun ɪnˈsɛpʃən

inception

开端
Meaning
The establishment or starting point of an institution or activity.
Example
The inception of the company marked a new era in the industry.
公司的创始标志着行业的新纪元。
C1 verb /ˈfɔːrtɪˌfaɪ/

fortify

加强
Meaning
To strengthen a place, person, or thing physically or mentally.
Example
They fortified the city walls to protect against invasion.
他们加固了城市的墙壁，以防止入侵。
C1 noun /ˌdɜːrməˈtɑːlədʒɪst/

dermatologist

皮肤科医生
Meaning
A doctor who specializes in the treatment of skin diseases.
Example
She consulted a dermatologist for her skin allergy.
她因皮肤过敏去咨询了皮肤科医生。
C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

逃犯
Meaning
a person who has escaped from a place or is in hiding, especially to avoid arrest
Example
The police launched a manhunt to capture the fugitive who escaped from prison.
警方展开了追捕行动，试图抓捕从监狱逃跑的逃犯。
C1 noun /ˈhɜːrniə/

hernia

疝气
Meaning
A medical condition where an organ pushes through the muscle or tissue holding it in place.
Example
The doctor diagnosed him with an inguinal hernia.
医生诊断他有腹股沟疝气。
C1 adjective ˈfjuː.taɪl

futile

徒劳的
Meaning
Incapable of producing any useful result; pointless.
Example
His attempts to change the situation were futile.
他改变局势的努力是徒劳的。
C1 adjective /əˈnɒmələs/

anomalous

异常
Meaning
deviating from what is standard, normal, or expected
Example
Scientists observed an anomalous result during the experiment.
科学家在实验中观察到了一个异常的结果。
C1 noun ˌɒb.səˈlɛs.əns

obsolescence

淘汰
Meaning
The process of becoming obsolete or outdated and no longer used.
Example
The rapid advancement of technology leads to the obsolescence of old devices.
科技的快速发展导致旧设备的淘汰。
C1 noun /rɪˈfaɪnəri/

refinery

炼油厂
Meaning
an industrial facility where raw materials are processed and purified
Example
The oil refinery processes thousands of barrels daily.
石油炼油厂每天处理数千桶石油。
C1 verb /ˈstaɪfl/

stifle

抑制
Meaning
to prevent or restrain an action, idea, or emotion; to suffocate
Example
She tried to stifle a laugh during the serious meeting.
她试图在严肃的会议中抑制笑声。
C1 verb, noun /mɛʃ/

mesh

网格, 编织
Meaning
To fit or work together properly; or a material made of interlaced threads.
Example
The two gears mesh perfectly to keep the machine running smoothly.
这两个齿轮完美契合，使机器平稳运行。
C1 adjective /ˌɛnɪɡˈmætɪk/

enigmatic

神秘的
Meaning
mysterious and difficult to interpret or understand
Example
He gave me an enigmatic smile.
他给了我一个神秘的微笑。
C1 noun /ˈkleɪmənt/

claimant

索赔人
Meaning
a person who makes a claim, especially in a legal or financial context
Example
The claimant filed for compensation after the accident.
索赔人事故后申请赔偿。
C1 adjective /nəʊˈmæd.ɪk/

nomadic

游牧
Meaning
Living the life of a nomad; wandering from place to place without a fixed home.
Example
The tribe led a nomadic lifestyle.
部落过着游牧生活。
C1 adjective /ɪnˈdetɪd/

Indebted

负债的; 感激的
Meaning
owing money or gratitude to someone; obligated; grateful
Example
I am deeply indebted to my teacher for all her guidance.
我对我的老师为我提供的所有指导深感感激。
C1 noun /ˌrɛspɪˈreɪʃən/

respiration

Meaning
The process of breathing or the exchange of gases in living organisms.
Example
Respiration is essential for all living beings.
C1 adjective /ˈɛərˌtaɪt/

airtight

密封的
Meaning
Completely sealed so that no air can get in or out.
Example
Store the cookies in an airtight container to keep them fresh.
将饼干存放在密封容器中，以保持其新鲜。
C1 verb /siːd/

cede

放弃
Meaning
to give up power, territory, or rights to another
Example
The country ceded territory after losing the war.
这个国家在输了战争后，放弃了领土。
C1 noun prəˈfaʊnd ɪˈnɪʃətɪv

profound initiative

深远的倡议
Meaning
A deep, meaningful, and significant action or program designed to create change.
Example
A profound initiative can create sustainable changes.
一个深刻的倡议可以创造可持续的变化。
C1 noun /fɪˈlæn.θrə.pi/

philanthropy

慈善事业
Meaning
the desire to promote the welfare of others, often expressed by the generous donation of money to good causes
Example
Philanthropy has helped improve healthcare in many developing countries.
慈善事业帮助改善了许多发展中国家的医疗保健。
C1 noun /ˈlɪməˌziːn/

limousine

由司机驾驶的豪华大轿车
Meaning
a large, luxurious car driven by a chauffeur.
Example
The bride arrived in a white limousine.
新娘乘坐一辆白色的豪华轿车到达。
C1 noun /ˌsəʊʃəˈbɪləti/

sociability

社交性
Meaning
The quality or state of being sociable; friendliness.
Example
Her sociability made her popular in the office.
她的社交性使她在办公室中非常受欢迎。
C1 noun /ˈneb.jʊ.lə/

nebula

星云
Meaning
A cloud of gas and dust in outer space, sometimes visible in the night sky.
Example
The Orion Nebula is one of the brightest in the sky.
猎户座星云是天空中最明亮的之一。
C1 noun /pəˈpaɪrəs/

papyrus

纸莎草
Meaning
An ancient writing material made from the pith of the papyrus plant; also refers to the plant itself.
Example
The ancient scroll was written on papyrus.
古老的卷轴是用纸莎草写的。