caught off guard
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idiom

caught off guard

被某些意外事情惊讶或震惊
Meaning
surprised or shocked by something unexpected
Example
She was **caught off guard** by the sudden question.
她被突如其来的问题吓了一跳。
idiom

clamp down

采取强硬措施来制止某事
Meaning
to take strong action to stop something
Example
The manager decided to **clamp down** on late arrivals.
经理决定对迟到的人采取严格措施。
idiom

call the tune

掌控; 做出重要决定
Meaning
to be in control; to make important decisions
Example
In this company, the investors **call the tune**.
在这家公司，投资者做出重要决策。
idiom

cash in on

从某个情况中获利，通常很快
Meaning
to profit from a situation, often quickly
Example
Several startups tried to **cash in on** the sudden trend.
几个初创公司试图从突如其来的趋势中获利。
idiom

carve your own path

开辟自己的道路以获得成功或独立
Meaning
to create your own way of achieving success or independence
Example
She decided to **carve her own path** instead of joining her family business.
她决定**开辟自己的道路**，而不是加入家族企业。
idiom

Cook up a story

编造一个虚假的故事。
Meaning
To invent a false story.
Example
He **cooked up a story** to explain why he was late.
他编造了一个故事来解释他为什么迟到。
idiom

Curiosity killed the cat

过于好奇可能导致麻烦。
Meaning
Being too inquisitive can lead to trouble.
Example
Don't ask too many questions about his past — **curiosity killed the cat**.
不要问他太多关于过去的问题 — 好奇害死了猫。
idiom

cry wolf

发出虚假的警报
Meaning
to raise a false alarm
Example
Do not **cry wolf** or no one will believe you later.
不要**发出虚假的警报**，否则以后没人会相信你。
idiom

cloud computing

使用远程服务器通过互联网存储、管理和处理数据的做法
Meaning
the practice of using remote servers to store, manage, and process data over the internet
Example
Many businesses rely on **cloud computing** for data storage and security.
许多企业依赖于**云计算**来进行数据存储和安全。
idiom

chain reaction

由一个事件引发的一系列事件
Meaning
a series of events triggered by one event
Example
One breakthrough can start a **chain reaction** of new innovations.
一个突破可以引发新的创新的**连锁反应**。
idiom

call to action

一种鼓励观众立即回应的提示
Meaning
a prompt that encourages an immediate response from an audience
Example
Your ad must include a strong **call to action**.
您的广告必须包含一个强有力的 **行动号召**。
idiom

carry the responsibility

负责某事或对其负责
Meaning
to be in charge of something or to be responsible for it
Example
As the project leader, he had to **carry the responsibility** for the entire team.
作为项目经理，他必须承担整个团队的责任。
idiom

caught between a rock and a hard place

进退两难
Meaning
in a difficult situation where any choice you make will have negative consequences
Example
I'm **caught between a rock and a hard place** - both options are terrible.
我进退两难，两个选择都很糟糕。
idiom

come straight to the point

直接而诚实，不浪费时间
Meaning
to be direct and honest without wasting time
Example
Please **come straight to the point** and tell me what happened.
请直接了当告诉我发生了什么。
idiom

come to terms with

在经过一些谈判后达成协议或接受一种情况
Meaning
to reach an agreement or accept a situation after some negotiation
Example
It took some time, but eventually we **came to terms with** the new policy.
这花了一些时间，但最终我们**接受了**新政策。
idiom

cat nap

白天短暂的小睡
Meaning
a short sleep during the day
Example
I took a **cat nap** before the meeting.
我在会议前小睡了一会儿。
idiom

cross the ethical line

做某事，被认为在道德上是错误的
Meaning
to do something that is considered morally wrong in ethics
Example
Selling user data without permission **crosses the ethical line**.
未经许可出售用户数据 **越过了道德界限**。
idiom

carry on about

激动或恼火地长时间讲述
Meaning
to speak at length in an excited or annoyed way
Example
He kept **carrying on about** the missed deadline all morning.
他整整一早上都在**讲述**错过的最后期限。
idiom

cry over spilled milk

为不能改变的事而烦恼
Meaning
to be upset about something that cannot be changed
Example
There's no use **crying over spilled milk**.
为已经发生的事哭泣没有意义。
idiom

cross that bridge when we come to it

只有在问题出现时才处理问题
Meaning
to deal with a problem only when it arises
Example
Don't worry about the challenges now, we will **cross that bridge when we come to it**.
现在不要担心挑战，我们会**当我们遇到问题时再解决**。
idiom

cut and dry

清晰直接; 没有混淆的空间
Meaning
clear and straightforward; no room for confusion
Example
The decision wasn’t as **cut and dry** as they expected.
决策并不像他们预期的那样明确直接。
idiom

cool as a cucumber

非常冷静和镇定
Meaning
very calm and composed
Example
He stayed **cool as a cucumber** during the meeting.
他在会议期间保持非常冷静。
idiom

check back in

稍后再次联系以获取更新
Meaning
to reconnect later to get an update
Example
Let’s **check back in** next week on the prototype.
我们下周再检查原型。
idiom

cross your heart and hope to die

真诚地发誓某事是真的
Meaning
to swear that something is true, often said with sincerity
Example
I **cross my heart and hope to die** that I will never lie to you.
我发誓并希望死去，我绝不会对你撒谎。
idiom

cop a plea

为了避免更严厉的惩罚，承认较轻的罪名
Meaning
to plead guilty to a lesser charge in order to avoid a more severe penalty
Example
He decided to **cop a plea** and serve a shorter sentence.
他决定认罪并服较短的刑期。
idiom

Catwalk queen

一个非常自信又时尚的女人，就像模特一样
Meaning
A woman who is very confident and stylish, like a model
Example
She walked into the room like a **catwalk queen**.
她走进房间，像一个T台女王。
idiom

count on

依赖某人做某事
Meaning
to rely on or trust someone to do something
Example
You can always **count on** me.
你总是可以依赖我。
idiom

catch some z’s

睡一会儿
Meaning
to get some sleep
Example
I need to **catch some z’s** before the meeting.
我需要在会议前睡一会儿。
idiom

chicken out

因为害怕而决定不做某事
Meaning
to decide not to do something because of fear
Example
He was going to ask her out but **chickened out** at the last minute.
他本来要约她出去，但在最后一刻**临阵退缩**了。
idiom

code of ethics

一组指导人工智能开发或使用的道德原则
Meaning
a set of moral principles guiding AI development or usage
Example
Developers must follow a strict **code of ethics** in AI research.
开发者必须在人工智能研究中遵守严格的**道德规范**。
idiom

catfish someone

通过创建虚假的在线身份来欺骗某人
Meaning
to deceive someone by creating a fake online identity
Example
He was **catfished** by someone pretending to be a model.
他被某个假装是模特的人**欺骗**了。
idiom

call to arms

为了捍卫某个原因而采取行动的号召
Meaning
a call to take action, especially to defend a cause
Example
The leader’s speech was a **call to arms** for all citizens to fight corruption.
领导人的演讲是一个**号召大家行动起来**，呼吁所有公民与腐败作斗争。
idiom

Cogito, ergo sum

我思故我在。一个基本的哲学命题，声称思考的行为是证明个体存在的证据。
Meaning
I think, therefore I am. A fundamental philosophical proposition that asserts the act of thinking is proof of one's existence.
Example
René Descartes' famous phrase **Cogito, ergo sum** highlights the importance of self-awareness in understanding existence.
勒内·笛卡尔的名句 **科吉托, 埃尔戈 苏姆** 突出了自我意识在理解存在中的重要性。
idiom

crazy about someone

深深地被某人吸引或迷住
Meaning
to be deeply attracted or infatuated with someone
Example
She’s **crazy about** her new boyfriend.
她对她的新男朋友**疯狂**。
idiom

cream of the crop

一组中的最佳；最优选择
Meaning
the best of a group; the finest selection
Example
These students are the **cream of the crop**.
这些学生是**最棒的**。
idiom

cold call

在没有事先介绍的情况下联系潜在客户
Meaning
to contact a potential customer without prior introduction
Example
He spent all morning making **cold calls** to new clients.
他花了一整个早上给新客户打**冷电话**。
idiom

castles in the air

不可能或不现实的梦想或计划
Meaning
dreams or plans that are impossible or unrealistic
Example
He’s always building **castles in the air** about his future.
他总是在为自己的未来建造**castles in the air**。
idiom

count to ten

在生气之前暂停并冷静下来
Meaning
to pause and calm down before reacting in anger
Example
When you’re upset, just **count to ten** before speaking.
当你生气时，在说话之前先**数到十**。
idiom

cross your heart

做出真诚的承诺
Meaning
to make a sincere promise
Example
I’ll never tell anyone, **cross my heart**.
我永远不会告诉任何人，**我发誓**。
idiom

Chart a course

计划达成某事的方法。
Meaning
To plan a way to achieve something.
Example
The company has **charted a course** for global expansion.
公司已为全球扩展**制定了计划**。
idiom

corner office

公司中成功或高职位的象征
Meaning
a symbol of success or high position in a company
Example
Everyone dreams of getting the **corner office** one day.
每个人都梦想有一天能得到 **角落办公室**。
idiom

come clean

告诉隐藏的事情的真相
Meaning
to tell the truth about something you have been hiding
Example
He finally **came clean** about what happened.
他终于坦白了发生了什么。
idiom

Cut your losses

停止做不再有利可图的事情。
Meaning
To stop doing something that is no longer profitable.
Example
It’s better to **cut your losses** and move on.
最好**止损**并继续前进。
idiom

cover up

掩盖某事的真相
Meaning
to hide the truth about something
Example
They tried to **cover up** the mistake.
他们试图掩盖这个错误。
idiom

cold feet

对某事感到紧张或犹豫不决
Meaning
to feel nervous or hesitant about something
Example
He got **cold feet** before proposing to her.
在向她求婚之前，他感到犹豫不决。
idiom

cornerstone of success

实现成功的最重要基础或要素
Meaning
the most important foundation or element for achieving success
Example
Hard work is the **cornerstone of success**.
勤奋工作是**成功的基石**。
idiom

cold war

国家之间没有实际战争的政治敌对和紧张状态
Meaning
a state of political hostility and tension between countries without actual warfare
Example
During the 20th century, the United States and the Soviet Union were engaged in a **cold war**.
在20世纪，美国和苏联参与了一场**冷战**。
idiom

chatterbox

一个说很多话的人
Meaning
a person who talks a lot
Example
My little sister is a real **chatterbox**.
我的小妹妹是个真正的喋喋不休的人。
idiom

circle back

稍后返回到一个话题或任务
Meaning
to return to a topic or task later
Example
Let's **circle back** to this issue after lunch.
我们午餐后再回到这个问题。
idiom

climb to the top

在公司或领域中达到最高职位
Meaning
to achieve the highest position in a company or field
Example
He’s determined to **climb to the top** of his profession.
他决心**登上顶峰**，成为他的职业巅峰。
idiom

climbing the ladder

改善自己的位置，通常是在职业或个人成长中
Meaning
to improve one's position, typically in a career or personal growth
Example
He started at the bottom of the company and has been **climbing the ladder** ever since.
他从公司最底层开始，从那时起他一直在**爬上梯子**。
idiom

clear the air

通过坦诚交谈消除紧张或误会
Meaning
to remove tension or misunderstanding by talking openly
Example
We need to sit down and **clear the air** about what happened last week.
我们需要坐下来坦诚地谈谈上周发生的事情，以消除误会。
idiom

couldn't believe my eyes

惊讶得不敢相信自己所看到的
Meaning
to be so surprised that you doubt what you see
Example
I **couldn’t believe my eyes** when I saw the results.
当我看到结果时，我简直不敢相信自己的眼睛。
idiom

cross your fingers

希望事情按你想要的方式发生
Meaning
to hope that things will happen the way you want
Example
I'm **crossing my fingers** that I get the job.
我在祈祷我能得到这份工作。
idiom

change one's tune

改变自己的意见或态度
Meaning
to change one's opinion or attitude
Example
After hearing the good news, he decided to **change his tune**.
听到好消息后，他决定**改变自己的看法**。
idiom

canary in the coal mine

潜在危险的早期警告
Meaning
an early warning of potential danger
Example
Melting glaciers are the **canary in the coal mine** for climate change.
融化的冰川是气候变化的**煤矿中的金丝雀**。
idiom

content is king

高质量的内容是在线成功的最重要因素
Meaning
high-quality content is the most important factor for success online
Example
Never forget that **content is king** in digital marketing.
永远不要忘记，在数字营销中，**内容就是王者**。
idiom

cool off

冷却或冷静
Meaning
to become less hot or less angry
Example
Let the soup **cool off** before serving.
让汤在上桌前冷却。
idiom

come down hard on

严厉地惩罚或批评某人
Meaning
to punish or criticize someone severely
Example
The company **came down hard on** employees who broke the rules.
公司严厉地惩罚了违反规则的员工。
idiom

connect the dots

在思想或信息之间建立联系
Meaning
to make connections between ideas or information
Example
Once you **connect the dots**, the whole picture will make sense.
一旦你**连接点**，整个图像就会有意义。
idiom

create buzz

引起人们对某个产品或活动的兴奋和讨论
Meaning
to generate excitement and talk about a product or event
Example
The teaser video helped **create buzz** before the product launch.
预告视频帮助在产品发布前引起了热议。
idiom

Culture shock

遇到不同文化时的困惑感
Meaning
A feeling of confusion when encountering a different culture
Example
Moving to Japan gave her a bit of **culture shock** at first.
搬到日本让她刚开始时感到有点 **文化冲击**。
idiom

come out with it

公开或诚实地说出你一直隐藏的事情
Meaning
to say something openly or honestly that you’ve been hiding
Example
Stop hesitating and just **come out with it**!
别再犹豫，直接说出来！
idiom

Climb the ranks

通过努力工作和经验升职到更高的位置。
Meaning
To move up to higher positions through hard work and experience.
Example
He **climbed the ranks** from an intern to a manager in five years.
他在五年内从实习生升职为经理，攀升了职级。
idiom

catch the train

准时赶上火车或事件
Meaning
to be on time for a train or event
Example
Hurry up or you’ll not **catch the train**!
快点，否则你会错过火车！
idiom

chip in

为共同的目标贡献金钱或努力
Meaning
to contribute money or effort to a shared goal
Example
Everyone agreed to **chip in** for Maya’s farewell gift.
大家一致同意为玛雅的告别礼物出钱。
idiom

cross one's heart

做出真诚的承诺，通常由孩子们使用
Meaning
to make a sincere promise, often used by children
Example
I’ll never lie to you again, **cross my heart**.
我再也不会对你撒谎了，**我发誓**。
idiom

come to mind

突然想起某事
Meaning
to suddenly remember something
Example
Her name didn’t **come to mind** at first.
她的名字一开始没有想起来。
idiom

Clean hands

无罪或没有负罪感。
Meaning
To be innocent or free from guilt.
Example
He claims to have **clean hands** in the scandal.
他声称在丑闻中有**clean hands**。
idiom

come out of one's shell

变得更外向或更自信
Meaning
to become more outgoing or confident
Example
She used to be shy, but now she has finally **come out of her shell**.
她以前很害羞，但现在她终于**走出了她的壳**。
idiom

crossed wires

两个人之间的误会
Meaning
a misunderstanding between two people
Example
We must have **crossed wires** about the meeting time.
我们可能在会议时间上产生了误会。
idiom

carve out

通过努力创造或获得某物
Meaning
to create or obtain something with effort
Example
She managed to **carve out** time for daily reading.
她成功地为每天阅读挤出了时间。
idiom

calm down

冷静下来或放松
Meaning
to become less angry or upset
Example
Please **calm down**, everything is under control.
请冷静下来，一切都在掌控之中。
idiom

come to the rescue

帮助陷入困境的人
Meaning
to help someone in trouble
Example
A firefighter **came to the rescue** of the trapped cat.
一名消防员**来救援**被困的猫。
idiom

cancel culture

在某人做了冒犯性的事情之后撤回对他们的支持的做法
Meaning
the practice of withdrawing support from someone after they do something offensive
Example
Many celebrities fear **cancel culture** online.
许多名人害怕在线的**取消文化**
idiom

Cut one’s losses

停止做一些失败的事情，以避免进一步的损失。
Meaning
To stop doing something that is failing to avoid further loss.
Example
It’s better to **cut your losses** and exit the market now.
现在最好是**减少你的损失**并退出市场。
idiom

come up with

想出一个计划、想法或解决方案
Meaning
to think of a plan, idea, or solution
Example
She managed to **come up with** a clever workaround overnight.
她成功地在一夜之间想出了一个巧妙的解决方法。
idiom

cross the floor

改变政治忠诚或党派
Meaning
to change political allegiance or party
Example
The MP shocked everyone when he decided to **cross the floor** and join the opposition.
当议员决定**跨越楼层**并加入反对党时，震惊了所有人。
idiom

chip in for

为共同费用出钱
Meaning
to contribute money toward a shared cost
Example
Everyone agreed to **chip in for** a farewell cake.
每个人都同意为告别蛋糕出钱。
idiom

clash of civilizations

不同文化、宗教或文明群体之间的冲突
Meaning
the conflict between different cultural, religious, or civilizational groups
Example
The debate about cultural differences is often seen as a **clash of civilizations**.
关于文化差异的辩论常被视为一次**文明的冲突**。
idiom

close ranks

在面对反对时团结并相互支持
Meaning
to unite and support each other when facing opposition
Example
The employees **closed ranks** after the company came under criticism.
员工们在公司受到批评后**团结一致**。
idiom

Cross my heart

我真诚地发誓或承诺。
Meaning
I swear or promise sincerely.
Example
I will help you, **cross my heart**.
我会帮你，**kruosi mai hat**。
idiom

cross the line

做被认为不可接受的事情
Meaning
to do something that is considered unacceptable
Example
He **crossed the line** when he insulted her in front of everyone.
当他当着所有人的面侮辱她时，他**越界了**。
idiom

change your mind

决定与之前不同的事情
Meaning
to decide something different from before
Example
She **changed her mind** about going to the party.
她**改变了主意**不去参加聚会。
idiom

catch someone red-handed

当某人做错事时把他抓住
Meaning
to catch someone in the act of doing something wrong
Example
The police **caught him red-handed** as he was stealing from the store.
警察**当场抓住了他**，当时他正在商店偷东西。
idiom

catch the travel bug

变得对旅行非常感兴趣
Meaning
to become very interested in traveling
Example
After visiting Thailand, she really **caught the travel bug**.
参观泰国后，她真的**感染了旅行的虫子**。
idiom

come through

在困难的情况下做出预期或承诺的事情
Meaning
to do what is expected or promised, especially in difficult situations
Example
She always **comes through** when we need her most.
她总是在我们最需要她的时候帮助我们。
idiom

cold case

一宗长时间未解决的刑事案件
Meaning
a criminal case that has not been solved for a long time
Example
The detective reopened a **cold case** from 1999.
侦探重新开启了1999年的**冷案**。
idiom

come out clean

被证明无罪或免除指责。
Meaning
To be proven innocent or free from blame.
Example
After investigation, he **came out clean**.
经过调查后，他被证明是清白的。
idiom

cover story

杂志或报纸封面的主要故事
Meaning
the main story on the front of a magazine or newspaper
Example
Her interview became the **cover story** of the week.
她的采访成为了本周的封面故事。
idiom

chill out

放松并停止生气或紧张
Meaning
to relax and stop being angry or nervous
Example
You need to **chill out** and enjoy the weekend.
你需要放松并享受周末。
idiom

clean conscience

有一种感觉，你没有做错任何事情
Meaning
feeling that you have done nothing wrong
Example
He can sleep well because he has a **clean conscience**.
他可以睡得很好，因为他有一颗**干净的良心**。
idiom

chin up, soldier

在困难的情况下保持勇敢和坚强
Meaning
to stay brave and strong in difficult situations
Example
**Chin up, soldier**, things will get better soon.
**振作起来，士兵**，一切很快就会好起来。
idiom

corner the market

主导特定市场
Meaning
to dominate a particular market
Example
They’ve managed to **corner the market** in organic products.
他们已经成功主导了有机产品市场。
idiom

Cut class

未经允许逃课
Meaning
To skip a class without permission
Example
He **cut class** to watch a movie.
他逃课去看电影了。
idiom

call someone out

公开批评某人的行为或行动
Meaning
to criticize someone publicly for their behavior or actions
Example
She **called him out** for being rude to the waiter.
她因对服务员无礼而**公开批评**了他。
idiom

conversion rate

网站访问者中采取期望行动（如购买或注册）的百分比。
Meaning
The percentage of visitors to a website who take a desired action, such as making a purchase or signing up.
Example
Our **conversion rate** has significantly improved after the redesign of the website.
网站重新设计后，我们的**转化率**显著提高了。
idiom

check over

仔细检查某事以发现错误
Meaning
to examine something carefully for mistakes
Example
Let’s **check over** the draft before sending it.
在发送之前我们检查过草稿。
idiom

change of guard

领导或权力的更替
Meaning
a change in leadership or authority
Example
There has been a **change of guard** in the ruling party.
在执政党发生了**换防**。
idiom

clean up one’s act

改善行为或表现；变得更加负责任
Meaning
to improve behavior or performance; to become more responsible
Example
The factory had to **clean up its act** to avoid heavy fines.
工厂必须**改善行为**以避免重罚。
idiom

crack the books

打开书本并开始学习
Meaning
to open your books and begin studying
Example
It's time to **crack the books** and prepare for finals.
是时候打开书本并为期末考试做准备。
idiom

chapter and verse

提供关于某事的完整和准确细节
Meaning
to provide full and exact details about something
Example
She can quote **chapter and verse** to support her argument.
她可以引用**chapter and verse**来支持她的论点。
idiom

Crooked as a snake

不诚实或不可靠
Meaning
Dishonest or untrustworthy.
Example
Everyone knows that politician is **crooked as a snake**.
大家都知道那位政治家是**像蛇一样不诚实**。
idiom

curtain call

当表演者回到舞台上接受掌声时
Meaning
when performers return to the stage to receive applause
Example
After their amazing act, the team received a standing ovation during the **curtain call**.
在他们精彩的表演之后，团队在**帷幕落下**时得到了站立的掌声。
idiom

clickbait

旨在吸引注意并鼓励点击的标题或内容
Meaning
a headline or content designed to attract attention and encourage clicks
Example
That article title is pure **clickbait**.
那篇文章的标题完全是**点击诱饵**。
idiom

cross that bridge when you come to it

等问题发生时再处理，不要提前
Meaning
to deal with a problem when it happens, not before
Example
We will **cross that bridge when we come to it**.
等到了那一步我们再说。
idiom

Change is the only constant

生活中的一切都在不断变化；没有什么保持不变。
Meaning
Everything in life keeps changing; nothing stays the same.
Example
Don’t resist — change is the only constant.
不要抵抗 — 变化是唯一不变的。
idiom

clear away

移除物品以整理空间
Meaning
to remove things to tidy a space
Example
Please **clear away** the dishes after lunch.
请在午餐后清理盘子。
idiom

chew someone out

生气地责骂或批评某人
Meaning
to angrily scold or criticize someone
Example
The coach **chewed out** the team for their poor performance.
教练因为球队糟糕的表现而责骂了球队。
idiom

cut back on

减少某事的数量
Meaning
to reduce the amount of something
Example
We’re trying to **cut back on** eating out during the week.
我们正在试图减少一周内外出就餐的次数。
idiom

check in with

与某人联系以交流最新情况
Meaning
to contact someone to exchange updates
Example
I’ll **check in with** the vendor later today.
我今天晚些时候会与供应商联系。
idiom

Cultural shock

当接触到不同的文化或生活方式时的困惑感
Meaning
A feeling of confusion when exposed to a different culture or way of life
Example
Moving from a small village to a big city gave me **cultural shock**.
从一个小村庄搬到大城市让我感到文化冲击。
idiom

cutting corners

以最简单或最便宜的方式做事，通常会牺牲质量
Meaning
to do something in the easiest or cheapest way, often sacrificing quality
Example
They finished early by **cutting corners**, but the result was poor.
他们通过“走捷径”提前完成，但结果很差。
idiom

come out on top

在某种情况下最好的或最成功的
Meaning
to be the best or most successful in a situation
Example
Despite the competition, she **came out on top**.
尽管有竞争，她**成功脱颖而出**。
idiom

carry on luggage

随身携带的小包或行李
Meaning
small bags taken with you on a plane or trip
Example
She packed all her essentials in her **carry on luggage**.
她把所有必需品都装在她的随身行李里。
idiom

call a spade a spade

诚实直接地说话，即使它令人不悦
Meaning
to speak honestly and directly, even if it’s unpleasant
Example
She always **calls a spade a spade**, no matter who gets offended.
她总是直言不讳，不管谁生气。
idiom

cloak and dagger

涉及秘密、神秘和欺骗
Meaning
involving secrecy, mystery, and deception
Example
The meeting was surrounded by **cloak and dagger** secrecy.
会议充满了‘cloak and dagger’的秘密。
idiom

come of age

达到成熟；完全发展
Meaning
to reach maturity; to become fully developed
Example
The company has **come of age** in the last few years.
公司在最近几年已经成熟。
idiom

cross off

从清单中删除一项
Meaning
to remove an item from a list
Example
You can **cross off** the tasks we’ve finished.
你可以把我们完成的任务**从清单中划掉**。
idiom

cut above the rest

比别人更好
Meaning
to be better than others
Example
His presentation was **a cut above the rest**.
他的演讲比别人更好。
idiom

Crossing the Rubicon

采取一个不可逆转的步骤，带来严重后果。
Meaning
Taking an irreversible step with serious consequences.
Example
By going public with the information, he was **crossing the Rubicon**.
通过公开信息，他迈出了一个不可逆转的步伐。