calculus
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C1 noun /ˈkælkjʊləs/

calculus

微积分
Meaning
A branch of mathematics concerned with rates of change and accumulation; also a hard mineral deposit in the body such as on teeth.
Example
Calculus is essential for advanced studies in physics and engineering.
微积分是物理学和工程学高级研究的基础。
C1 noun /ˈkæmi.oʊ/

cameo

客串
Meaning
a small but significant role in a play, film, or show, often performed by a well-known person
Example
The actor made a surprise cameo in the movie.
那位演员在电影中出人意料地客串了。
C1 noun /ˈklaɪəntɛl/

clientele

客户群
Meaning
The clients or customers of a professional person or business.
Example
The salon's clientele includes many high-profile individuals.
这个沙龙的客户群包括许多高端人士。
C1 adjective kənˈkɝː.ənt

concurrent

同时发生的，平行的，在同一时间进行的
Meaning
Existing, happening, or done at the same time.
Example
The conference had concurrent sessions on various topics.
会议期间有多个并行的主题会议。
C1 noun /kənˈtɛndər/

contender

竞争者, 争夺者
Meaning
a person or team competing for a title or prize
Example
She is a strong contender for the mayoral position.
她是市长职位的强有力竞争者。
C1 noun /ˈsɪtəˌdɛl/

citadel

城堡
Meaning
A fortress protecting or dominating a city.
Example
The ancient citadel stood guard over the town for centuries.
古老的城堡为城市守卫了几个世纪。
C1 adjective /koʊˈɜːrsɪv/

coercive

强制性
Meaning
Relating to or using force or threats to make someone do something.
Example
The government faced criticism for adopting coercive measures against protestors.
政府因采用对抗议者的强制性措施而遭到批评。
C1 noun /kənˈfɔːrməns/

conformance

一致性
Meaning
The act of conforming to a rule, standard, or law.
Example
The product was tested for conformance with safety standards.
该产品已按照安全标准进行了符合性测试。
C1 noun kəˈmjuːnɪti ˈsɜːrvɪs aɪˈdiːəlz

community service ideals

社区服务理念
Meaning
Principles and standards of serving the community for social good.
Example
Community service ideals must be taught in schools.
社区服务理念必须在学校教授。
C1 noun /ˌkʌl də ˈsæk/

cul de sac

死胡同
Meaning
A street or passage closed at one end; a dead end.
Example
They bought a house at the end of a quiet cul de sac.
他们在一个安静的死胡同的尽头买了一栋房子。
C1 adjective /ˌʃoʊ.vəˈnɪs.tɪk/

chauvinistic

沙文主义
Meaning
Displaying or characterized by excessive or prejudiced loyalty or support, especially towards one's own gender or group.
Example
His chauvinistic attitude alienated many of his female colleagues.
他的沙文主义态度疏远了许多女性同事。
C1 noun /kuːp/

coop

鸡或其他鸟类的一个小围栏或笼子
Meaning
a small enclosure or cage for chickens or other birds
Example
The farmer checked the chickens in the coop every morning.
农民每天早上检查鸡舍里的鸡。
C1 noun /ˈkliː.vər/

Cleaver

切肉刀
Meaning
a heavy knife with a broad blade used for chopping meat or vegetables
Example
The chef used a cleaver to chop the chicken bones.
厨师用切肉刀切鸡骨头。
C1 verb /ˈklæmbər/

clamber

吃力地爬
Meaning
to climb with effort or difficulty, often using both hands and feet
Example
The children clambered over the rocks to reach the cave.
孩子们费力地爬过岩石，到达了洞穴。
C1 noun /ˌkɑːr.diˈɒl.ə.dʒɪst/

cardiologist

心脏病学家
Meaning
A doctor specializing in diagnosing and treating heart diseases.
Example
She made an appointment with a cardiologist for her chest pain.
她因胸痛预约了心脏病学家的诊察。
C1 noun /kliːk/

clique

小圈子
Meaning
a small, exclusive group of people
Example
The students formed a clique that excluded others.
学生们组成了一个排外的小圈子。
C1 noun /ˈkɒləmnɪst/

columnist

专栏作家
Meaning
a journalist who regularly writes articles or opinions for a newspaper or magazine
Example
The columnist wrote an article about climate change.
专栏作家写了一篇关于气候变化的文章。
C1 adjective /klaɪˈmæktɪk/

climactic

高潮的
Meaning
Relating to the most exciting or important moment of something.
Example
The film ended with a climactic battle scene.
电影以一场高潮的战斗场景结束。
C1 adjective/noun /ˈkɜːrsɪv/

cursive

斜体字
Meaning
Written with characters joined together in a flowing manner.
Example
The teacher asked students to write the essay in cursive handwriting.
老师让学生用斜体字写作文。
C1 verb /ˈkəʊ.dɪ.faɪ/

codify

编码
Meaning
to arrange laws, rules, or ideas into a clear and systematic code
Example
The committee worked to codify the existing laws.
委员会致力于编码现有的法律。
C1 noun /ˈkæn.dɚ/

candor

坦诚
Meaning
The quality of being open, honest, and straightforward in speech or expression.
Example
She spoke with candor about the challenges she faced.
她坦诚地谈论了她面临的挑战。
C1 verb /ˈkɒŋɡrɪɡeɪt/

congregate

聚集, 集合
Meaning
to gather together in a group; to assemble
Example
People congregate in the town square every evening.
人们每天晚上都会在市中心的广场上聚集。
C1 adjective /ˌkætəˈklɪzmɪk/

cataclysmic

灾难性的
Meaning
Relating to or denoting a violent natural event or upheaval.
Example
The war had cataclysmic effects on the nation's economy.
战争对该国经济产生了灾难性的影响。
C1 noun /ˈkɔːkəs/

caucus

政治会议
Meaning
A meeting of members of a political party to select candidates or decide policy.
Example
The party held a caucus to nominate their candidate for president.
政党举行了一个会议，提名他们的总统候选人。
C1 adverb /ˈkɔːrdiəli/

Cordially

热情地
Meaning
in a warm and friendly manner; sincerely
Example
You are cordially invited to our wedding ceremony.
你被热情邀请参加我们的婚礼仪式。
C1 noun ˈkætəlɪst

catalyst

催化剂
Meaning
A person or thing that precipitates an event or change.
Example
His speech acted as a catalyst for change in the community.
他的演讲成为了社区变化的催化剂。
C1 noun /ˈsɪvɪks/

civics

公民教育
Meaning
the study of the rights and duties of citizens and how government works
Example
Civics helps students understand their responsibilities as citizens.
公民教育帮助学生理解作为公民的责任。
C1 noun /kɑst/

Caste

种姓; 种姓制度
Meaning
a social class system; a hereditary class of Hindu society
Example
The ancient caste system divided society into different social groups.
古老的种姓制度将社会划分为不同的社会群体。
C1 noun /ˈsɪ.nɪk/

Cynic

愤世嫉俗者; 怀疑主义者
Meaning
a person who believes that people are motivated purely by self-interest; someone who is skeptical about human nature
Example
The old cynic believed that politicians only cared about getting votes.
那个老愤世嫉俗者相信政治家只关心获得选票。
C1 verb /ˈsenʃər/

censure

谴责, 批评
Meaning
to criticize severely; to express strong disapproval
Example
The committee censured the politician for his misconduct.
委员会因他的不当行为谴责了政治家。
C1 noun /koʊˈɜː.ʃən/

coercion

胁迫
Meaning
The practice of persuading someone to do something by using force or threats.
Example
Cybercriminals use coercion to extract information.
网络犯罪分子使用胁迫手段提取信息。
C1 verb /kɜːrˈteɪl/

curtail

减少
Meaning
to reduce or limit something, especially something considered undesirable
Example
The company had to curtail its spending due to budget cuts.
由于预算削减，公司不得不缩减开支。
C1 verb /ˈkrɪsən/

christen

命名
Meaning
to give a name to someone at baptism or to name something officially
Example
They christened the ship after the queen.
他们为船命名，以女王的名字。
C1 adjective /ˈkoʊvərt/

covert

秘密
Meaning
hidden, secret, or not openly acknowledged
Example
The spy conducted a covert operation behind enemy lines.
间谍在敌人的线背后进行了一项秘密行动。
C1 noun /kæpˈtɪv.ɪ.ti/

Captivity

禁锢
Meaning
the condition of being imprisoned or confined
Example
After years of captivity, the prisoner was finally released.
经过多年的禁锢，囚犯终于被释放。
C1 noun /ˈkærət/

carat

宝石重量单位
Meaning
a unit of weight for precious stones, equal to 200 milligrams
Example
She received a two-carat diamond ring for her engagement.
她收到了一个两克拉的钻石戒指作为订婚礼物。
C1 adjective /ˈkɒnvɛks/

convex

凸的，向外弯曲的
Meaning
curved or rounded outward
Example
The lens has a convex shape to focus light.
该镜片具有凸形状以聚焦光线。
C1 noun /ˈkeɪ.sɪŋ/

Casing

外壳; 外罩
Meaning
a cover or shell that protects or encloses something
Example
The mechanic removed the engine casing to examine the internal parts.
机械师拆下了发动机外壳以检查内部零件。
C1 adjective /ˈtʃɪə.ləs/

Cheerless

沉闷; 沮丧; 悲伤; 无欢乐
Meaning
lacking happiness or comfort; gloomy; depressing; without cheer
Example
The old house looked cheerless and abandoned in the winter rain.
这座老房子在冬雨中看起来显得沉闷和荒废。
C1 verb /ˈkænvəs/

canvass

征求选票
Meaning
to solicit votes or opinions; to examine thoroughly; to discuss in detail
Example
They will canvass the neighborhood for votes.
他们将在邻里为选票进行宣传。
C1 noun /ˈkroʊ.bɑːr/

Crowbar

撬棍
Meaning
a heavy iron bar with a curved end used as a lever for prying things apart
Example
He used a crowbar to remove the old nails.
他用撬棍把旧钉子取了出来。
C1 verb /tʃaɪd/

chide

斥责
Meaning
to scold or rebuke; to express disapproval
Example
The teacher chided the student for being late.
老师因为学生迟到而训斥了他。
C1 verb /kənˈsɛptʃuəlaɪz/

conceptualize

构思
Meaning
to form an idea or concept of something in your mind
Example
The artist conceptualized a new design for the exhibition.
艺术家为展览构思了一个新的设计。
C1 noun /ˌkɒrəˈneɪʃən/

coronation

加冕礼
Meaning
the act or ceremony of crowning a sovereign or monarch
Example
The coronation of the new king was attended by thousands of people.
新国王的加冕礼有成千上万的人参加。
C1 adverb /ˈkrɒswaɪz/

Crosswise

交叉方向
Meaning
in the form of a cross; diagonally across
Example
Place the logs crosswise to build a stable fire.
将木柴交叉放置以建立一个稳定的火堆。
C1 noun /kəˈmɪtl̩/

committal

监禁 / 扣押
Meaning
The action of sending a person to prison or a mental hospital; also the act of committing something to a particular place.
Example
The judge ordered the committal of the accused to custody.
法官命令将被告送入拘留。
C1 noun /krʌst/

crust

外壳
Meaning
the hard outer surface of something, especially bread or the Earth's outer layer
Example
He cut off the crust of the bread before eating.
他在吃之前切去了面包的外壳。
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 adjective, noun /ˈkeɪnaɪn/

canine

与狗有关的 / 犬齿
Meaning
Relating to dogs; also refers to the pointed teeth in humans and animals
Example
The police trained a canine unit for search operations.
警察训练了一个警犬单位进行搜寻工作。
C1 adjective /kənˈtɛmptʃuəs/

contemptuous

轻蔑的, 鄙视的
Meaning
showing or expressing contempt; scornful
Example
She gave him a contemptuous glance.
她给了他一个轻蔑的眼神。
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 verb /ˈkætəˌlaɪz/

catalyze

催化
Meaning
To cause or accelerate a reaction or change.
Example
The new law catalyzed reforms across the sector.
新法律催化了整个行业的改革。
C1 noun /ˈkɒt.ən ˈfæb.rɪk/

Cotton Fabric

棉布
Meaning
textile made from cotton fibers, known for being soft, breathable, and comfortable
Example
Cotton fabric is perfect for summer clothing.
棉布是夏季衣物的完美选择。
C1 noun /ˌkɔːriˈɒɡrəfi/

choreography

编舞
Meaning
The art of designing and arranging dances and movements.
Example
The choreography of the ballet was breathtaking.
芭蕾舞的编舞令人惊叹。
C1 noun /ˈkælɪbər/

caliber

口径
Meaning
The quality of someone's ability or character; the internal diameter of a gun barrel.
Example
The university attracts students of high caliber.
这所大学吸引了高口径的学生。
C1 adjective /kənˈtɪɡ.ju.əs/

contiguous

相邻
Meaning
sharing a common border; touching
Example
The two continguous houses shared a wall.
这两座相邻的房子共享了一面墙。
C1 adjective ˌkɑːr.sɪ.nəˈdʒen.ɪk

carcinogenic

致癌的
Meaning
Having the potential to cause cancer in living tissue.
Example
Processed meat contains carcinogenic compounds.
加工肉类含有致癌的化合物。
C1 verb /tʃæsˈtaɪz/

chastise

Meaning
to criticize or punish severely
Example
The teacher chastised the student for being late.
C1 verb /ˌkɒm.pɑːtˈmen.təl.aɪz/

compartmentalize

划分
Meaning
To divide into sections or categories; to separate things into compartments.
Example
To increase efficiency, he compartmentalized his work tasks.
为了提高效率，他将工作任务划分开来。
C1 adjective /ˈkoʊpiəs/

copious

大量
Meaning
abundant in supply or quantity
Example
She took copious notes during the lecture.
她在讲座期间做了大量笔记。
C1 noun /klaʊt/

clout

影响力
Meaning
influence or power, especially in politics or business
Example
The businessman has a lot of political clout.
这位商人有很大的政治影响力。
C1 adjective /kənˈkluː.sɪv/

Conclusive

决定性的; 终结的; 完全解决问题
Meaning
final; decisive; settling a matter completely
Example
The evidence was conclusive and left no room for doubt.
证据是决定性的，没有留下任何怀疑的空间。
C1 noun /ˈkoʊhɔːrts/

cohorts

队列
Meaning
Groups of people who share a common feature or experience.
Example
Researchers compared the health outcomes of different cohorts.
研究人员比较了不同队列的健康结果。
C1 noun /klæn/

clan

氏族
Meaning
a large family group or a close-knit community with shared interests or ancestry
Example
The entire clan gathered to celebrate the festival.
整个氏族聚集在一起庆祝节日。
C1 noun /ˈkɒnstənsi/

constancy

忠诚/恒常
Meaning
the quality of being faithful and dependable
Example
Her constancy in friendship is admirable.
她在友谊中的恒常令人钦佩。
C1 noun ˈklaɪmət ˌrɛɡjʊˈleɪʃən

climate regulation

气候调节
Meaning
The moderation of climate conditions through natural or artificial processes.
Example
Forests help in climate regulation by stabilizing local temperatures.
森林通过稳定当地的温度来帮助气候调节。
C1 noun /ˈkɒz.moʊs/

Cosmos

宇宙花
Meaning
a colorful annual flower with daisy-like blooms and feathery foliage
Example
The cosmos flowers swayed gently in the summer breeze across the meadow.
宇宙花在夏季的微风中轻轻摇摆，穿过草地。
C1 noun /ˈkaʊn.tə.nəns/

countenance

面容，表情；支持
Meaning
a person's face or expression; support or approval
Example
Her cheerful countenance brightened the room.
她那愉快的面容照亮了房间。
C1 verb /kənˈfaʊnd/

confound

Meaning
to confuse or surprise someone, often by acting against their expectations
Example
The magician's trick seemed to confound the entire audience.
C1 verb /ˈkʌvət/

covet

渴望
Meaning
to desire something belonging to someone else
Example
He coveted his neighbor's new car.
他渴望邻居的新车。
C1 noun /ˈkriː.dəns/

credence

可信度, 信任
Meaning
belief in or acceptance of something as true
Example
The witness gave credence to the defendant's alibi.
证人给予被告的不在场证明可信度。
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 verb /ˈkæptɪveɪt/

captivate

迷住，吸引
Meaning
to attract and hold the interest of; to charm or fascinate
Example
Her beautiful voice captivated the audience.
她美丽的声音迷住了观众。
C1 noun kənˈɡlɒm.ər.ət

conglomerate

企业集团
Meaning
A large corporation formed by the merging of separate and diverse firms.
Example
The company grew into a multinational conglomerate.
这家公司发展成为一家跨国企业集团。
C1 noun kəˈlɛktɪvɪzəm

collectivism

集体主义
Meaning
The practice or principle of giving a group priority over each individual in it.
Example
Collectivism emphasizes the importance of group over individual interests.
集体主义强调集体利益高于个人利益。
C1 noun /ˈkɔːl.drən/

Cauldron

大锅
Meaning
a large metal pot with a lid and handle, used for cooking over a fire
Example
The witch stirred her potion in a large cauldron.
巫婆在一个大锅里搅拌她的药水。
C1 noun /ˈsɛntrɪˌfjuːdʒ/

centrifuge

离心机
Meaning
A machine that spins substances at high speed to separate different components.
Example
The lab technician used a centrifuge to separate the blood cells from the plasma.
实验室技术员使用离心机将血细胞从血浆中分离出来。
C1 adjective /kɑːrˈnɪv.ər.əs/

Carnivorous

食肉动物
Meaning
feeding on other animals; meat-eating
Example
Lions are carnivorous animals that hunt other animals for food.
狮子是食肉动物，它们捕猎其他动物作为食物。
C1 verb /ˈkʌn.dʒər/

conjure

召唤
Meaning
to summon something as if by magic; to imagine vividly
Example
The magician conjured a rabbit out of the hat.
魔术师从帽子里召唤出了一只兔子。
C1 adjective /kənˈteɪ.dʒəs/

Contagious

传染性; 有感染力
Meaning
likely to spread to and affect others; infectious
Example
Her laughter is contagious and makes everyone smile.
她的笑声具有传染性，让每个人都微笑。
C1 adjective /kənˈtɪn.ju.əl/

Continual

持续的；不停的
Meaning
happening repeatedly over a long period of time; constant and uninterrupted
Example
The continual noise from the construction site was very annoying.
来自建筑工地的持续噪音非常让人烦恼。
C1 adjective /kənˈdʒiːniəl/

congenial

和蔼可亲
Meaning
pleasant and friendly because of having similar interests or qualities
Example
They found the café a congenial place to meet and talk.
他们发现那家咖啡馆是一个和蔼可亲的地方，适合见面和交谈。
C1 noun ˌkæl.ɪˈbreɪ.ʃən

calibration

校准
Meaning
The action or process of adjusting or determining the accuracy of measuring instruments.
Example
The accuracy of a scale depends on regular calibration.
秤的准确性取决于定期校准。
C1 noun /ˈsɛntɪˌliːtər/

centiliter

Meaning
A metric unit of capacity equal to one hundredth of a liter.
Example
The recipe calls for 20 centiliters of milk.
C1 verb ˌsɝː.kəmˈvent

circumvent

巧妙地避免或绕过障碍或规则
Meaning
To cleverly avoid or find a way around obstacles or rules.
Example
He tried to circumvent the security system.
他试图绕过安全系统。
C1 noun /kjʊˈreɪtər/

curator

策展人
Meaning
a person who is responsible for the care and management of a museum, gallery, or collection
Example
The curator organized a new exhibition of ancient artifacts.
策展人组织了一个新的古代文物展览。
C1 noun /kənˈspɪrə.tər/

conspirator

阴谋者
Meaning
a person who secretly plans with others to do something unlawful or harmful
Example
The conspirator was arrested before the plan could be carried out.
阴谋者在计划得以实施之前被捕。
C1 noun kənˈvɜː.dʒəns

convergence

汇聚
Meaning
The process of coming together from different directions to meet at a common point; unification or integration.
Example
The convergence of technologies is revolutionizing industries.
技术的汇聚正在革命化行业。
C1 adjective /ˌkaʊntərɪnˈtuːɪtɪv/

counterintuitive

反直觉的
Meaning
contrary to what one would intuitively expect
Example
His approach seems counterintuitive but it actually works.
他的做法看起来很反直觉，但实际上很有效。
C1 verb /ˌkɒndɪˈsɛnd/

condescend

从高处以友善的态度
Meaning
to behave as if one is superior while being gracious to others
Example
He would not condescend to answer such a trivial question.
他不会屈尊回答如此琐碎的问题。
C1 noun /krəˈvæs/

crevasse

深裂缝
Meaning
a deep crack in a glacier or the earth’s surface
Example
The climbers carefully crossed the icy crevasse.
登山者小心地越过了冰冷的裂缝。
C1 adjective /ˈkʌlpəbl̩/

culpable

有罪的
Meaning
deserving blame or responsibility for a wrongdoing
Example
The judge found him culpable for the accident.
法官认定他对事故负有责任。
C1 noun /kəˈlɪɡrəfi/

calligraphy

美丽且装饰性的书写艺术
Meaning
The art of beautiful and decorative handwriting.
Example
She took a course to improve her calligraphy skills.
她参加了一个课程来提高她的书法技能。
C1 noun /ˌklɔːstrəˈfəʊbiə/

claustrophobia

Meaning
an extreme or irrational fear of being in confined spaces
Example
He avoids elevators because of his claustrophobia.
C1 adjective /kəˈrəʊsɪv/

corrosive

腐蚀性，损害
Meaning
tending to cause corrosion; harmful or destructive to materials or people
Example
The chemical is highly corrosive and should be handled with care.
该化学物质具有高度的腐蚀性，应该小心处理。
C1 noun /ˈkɑr.nɪdʒ/

Carnage

屠杀
Meaning
the killing of a large number of people; widespread slaughter
Example
The battlefield was filled with carnage after the brutal war.
战争后，战场上充满了大屠杀。
C1 noun /kəmˈpʌl.ʃən/

Compulsion

强迫; 强制;
Meaning
the action or state of forcing or being forced to do something; an irresistible urge to behave in a certain way
Example
He felt a strong compulsion to check his phone every few minutes.
他感到强烈的冲动，每隔几分钟就检查一次手机。
C1 noun /ˌkɒndʒʊˈɡeɪʃən/

conjugation

词形变化
Meaning
the variation of the form of a verb to indicate tense, person, and number
Example
French verbs have complex conjugations.
法语动词有复杂的变位。
C1 adverb kəmˈpæktli

compactly

紧凑地
Meaning
In a closely packed or dense manner.
Example
Protons and neutrons are compactly arranged.
质子和中子紧密地排列。
C1 noun /ˈkæzəm/

chasm

裂缝 / 巨大差异
Meaning
a deep fissure in the earth's surface or a wide difference between people or ideas
Example
There was a great chasm between the two political parties.
两个政党之间有一个巨大的裂缝。
C1 adjective /ˈkɔːʃənˌɛri/

cautionary

警示性的
Meaning
serving as a warning; intended to prevent problems or mistakes by giving advice or examples
Example
The report offers a cautionary message about unchecked spending.
该报告对失控的支出发出了警示性的信息。
C1 adjective /ˈkælkjʊleɪtɪŋ/

calculating

精明的
Meaning
acting in a scheming and ruthlessly determined way
Example
He had a cold and calculating approach to business.
他在商业上采取了冷酷而精明的态度。
C1 verb /kɑːrp/

carp

抱怨
Meaning
to complain or find fault continually, often about trivial matters
Example
She tends to carp about the smallest inconveniences.
她倾向于为最小的不便抱怨。
C1 noun /ˌkɒn.əˈsɜːr/

connoisseur

行家
Meaning
an expert judge in matters of taste, especially in food, art, or wine
Example
She is a true connoisseur of fine art.
她是美术的真正行家。
C1 adjective ˈser.ɪ.brəl

cerebral

大脑的
Meaning
Of the cerebrum of the brain.
Example
Cerebral functions regulate thoughts.
大脑功能调节思想。
C1 noun kɒɡˈnɪʃ.ən

cognition

认知
Meaning
The mental action or process of acquiring knowledge and understanding through thought, experience, and the senses.
Example
Cognition plays a key role in learning.
认知在学习中起着关键作用。
C1 noun /kəˈmændər ɪn tʃiːf/

Commander-in-chief

最高指挥官
Meaning
the supreme leader of a nation's armed forces
Example
The president serves as the commander-in-chief of the military.
总统担任军队的最高指挥官。
C1 noun /ˈkʌn.stə.bəl/

constable

巡警
Meaning
a police officer of the lowest rank
Example
The constable directed traffic at the busy intersection.
巡警在繁忙的十字路口指挥交通。
C1 noun /kræɡ/

crag

陡峭的悬崖或岩石面
Meaning
a steep or rugged cliff or rock face
Example
The hikers climbed the jagged crag to reach the summit.
远足者攀登陡峭的岩石面到达山顶。
C1 adjective /kəmˈpʌlsɪv/

compulsive

强迫的
Meaning
Resulting from or acting on an irresistible urge, especially one that is against one's conscious wishes.
Example
He is a compulsive gambler who cannot stop placing bets.
他是一个强迫症赌博者，无法停止下赌注。
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 /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 adjective /kəˈləʊ.kwi.əl/

colloquial

口语
Meaning
Used in ordinary conversation rather than formal speech or writing; informal language.
Example
His colloquial expressions made the speech relatable.
他的口语表达让演讲更加生动。
C1 verb /kəmˈpjuːt/

compute

计算
Meaning
To calculate or determine by using a computer or mathematical methods.
Example
The software can compute the total cost in seconds.
该软件可以在几秒钟内计算出总成本。
C1 adjective /kəˈmɛmərətɪv/

commemorative

纪念的
Meaning
Serving as a reminder or in honor of a person or event.
Example
They issued a commemorative coin for the independence anniversary.
他们发行了一枚纪念币，庆祝独立纪念日。
C1 verb /kəˈrəʊd/

corrode

腐蚀
Meaning
to gradually destroy or wear away metal or other materials through chemical action
Example
The iron pipes corroded over time due to exposure to water.
铁管因暴露在水中而随着时间的推移而腐蚀。
C1 noun /ˈkæviˌæt/

caveat

警告
Meaning
a warning or condition to be considered before taking action
Example
The proposal was accepted with one caveat.
该提案在附带警告的情况下被接受。
C1 noun /ˈkɒb.lər/

Cobbler

鞋匠
Meaning
a person who repairs shoes and other leather goods
Example
The cobbler fixed my broken shoes perfectly.
鞋匠完美地修好了我的破鞋。
C1 adjective /ˈkɒz.mɪk/

cosmic

宇宙的, 广阔的
Meaning
relating to the universe or cosmos; vast
Example
Astronomers study cosmic phenomena to understand the universe.
天文学家研究宇宙现象，以理解宇宙。
C1 noun /ˈsɪtrɪk ˈæsɪd/

Citric Acid

柠檬酸
Meaning
a natural acid found in citrus fruits, used as a food preservative and flavoring agent
Example
Add a pinch of citric acid to preserve the color of the fruit jam.
加入一撮柠檬酸以保持果酱的颜色。
C1 noun /kəmˈpəʊ.ʒər/

composure

冷静和自我控制的状态
Meaning
The state or feeling of being calm and in control of oneself.
Example
She maintained her composure during the interview.
她在面试中保持了冷静。