after the rain comes the rainbow
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idiom

after the rain comes the rainbow

好时光跟随坏时光之后而来
Meaning
good times follow bad times
Example
Don’t lose faith; **after the rain comes the rainbow**.
别失去信心; **雨后总会有彩虹**。
idiom

a piece of cake

非常容易做的事情
Meaning
something that is very easy to do
Example
The exam was **a piece of cake** for me.
这次考试对我来说是**小菜一碟**。
idiom

a drop in the ocean

与所需相比非常少的量
Meaning
a very small amount compared to what is needed
Example
The money they raised was just **a drop in the ocean** compared to the total cost.
他们筹集的钱与总成本相比只是大海中的一滴水。
idiom

addiction to something

强烈且有害的做某事或使用某物的需求
Meaning
a strong and harmful need to do or use something
Example
He is struggling with his **addiction to smoking**.
他在与他的**吸烟成瘾**作斗争。
idiom

adapt or perish

为了生存，必须适应新的条件
Meaning
to survive, one must adjust to the new conditions
Example
In the business world, it's all about **adapt or perish**.
在商业世界中，一切都与**适应或灭亡**有关。
idiom

artificial instinct

机器做出看似自然或类似人类的决策的能力
Meaning
a machine’s ability to make decisions that seem natural or human-like
Example
The new model shows a kind of **artificial instinct** while driving.
新模型在驾驶时展示了一种**人工本能**。
idiom

ahead of the pack

比竞争对手更成功
Meaning
to be more successful than competitors
Example
Her innovative ideas always keep her **ahead of the pack**.
她的创新想法总是让她保持在竞争对手之前。
idiom

at the end of the day

当一切都考虑到时；最终
Meaning
when everything is considered; ultimately
Example
**At the end of the day**, teamwork solved the problem.
最终，团队合作解决了问题。
idiom

a bookworm

一个喜欢读书的人
Meaning
a person who loves reading books
Example
She’s **a bookworm**; she spends hours in the library.
她是**书虫**; 她在图书馆呆了几个小时。
idiom

a good Samaritan

一個在需要時幫助他人的人
Meaning
a person who helps others in need
Example
A **good Samaritan** helped the injured man on the road.
一個**好撒馬利亞人**幫助了路上受傷的男人。
idiom

act the part

以符合特定角色或情境的方式行事
Meaning
to behave in a way that fits a particular role or situation
Example
If you want to be treated like a leader, you need to **act the part**.
如果你想像一个领导者一样被对待，你需要**扮演角色**。
idiom

a global village

由于科技和通信，世界被视为一个单一的社区
Meaning
the world considered as a single community due to technology and communication
Example
The internet has turned the world into **a global village**.
互联网把世界变成了一个全球村。
idiom

a fool and his money are soon parted

那些不小心管理自己钱财的人，很快就会失去它
Meaning
people who are careless with their money will lose it quickly
Example
He spent all his money on useless gadgets; **a fool and his money are soon parted**.
他把所有的钱都花在了无用的电子产品上；**傻瓜和他的钱很快就会分开**。
idiom

a clear conscience

一种没有罪恶感或后悔的状态
Meaning
a state of being free from guilt or regret
Example
She could sleep soundly at night because she had **a clear conscience**.
她晚上能安然入睡，因为她有一颗清白的良心。
idiom

a wolf in sheep's clothing

看起来无害但实际上很危险的人
Meaning
someone who appears harmless but is actually dangerous
Example
He was **a wolf in sheep's clothing**.
他是披着羊皮的狼。
idiom

above board

诚实合法; 没有欺骗
Meaning
honest and legal; without deceit
Example
Their business deal was completely **above board**.
他们的商业交易完全是**诚实合法**的。
idiom

a burning desire

强烈和深切的渴望去实现某事
Meaning
a strong and intense wish to achieve something
Example
She has **a burning desire** to become the best in her field.
她有 **强烈的渴望** 成为她领域的最佳。
idiom

algorithmic trading

使用算法在金融市场中实现自动化交易
Meaning
the use of algorithms to automate trading in financial markets
Example
Banks are increasingly using **algorithmic trading** to optimize their investments.
银行越来越多地使用**算法交易**来优化他们的投资。
idiom

a man of his word

一个信守诺言的人
Meaning
a person who keeps their promises
Example
He’s **a man of his word**, you can trust him.
他是一个信守诺言的人，你可以信任他。
idiom

a run on the bank

由于担心银行倒闭，许多人从银行提取他们的钱
Meaning
a situation where many people withdraw their money from a bank due to fear of collapse
Example
Rumors of insolvency caused **a run on the bank**.
破产的传闻引发了**银行挤兑**。
idiom

at the top of one’s game

处于最佳状态
Meaning
to be performing at one’s best level
Example
The athlete is **at the top of his game** this season.
这位运动员本赛季处于最佳状态。
idiom

a weight on your shoulders

沉重的负担或责任，造成压力
Meaning
a heavy burden or responsibility causing stress
Example
Running the company alone is **a weight on his shoulders**.
独自管理公司是 **他肩上的重担**。
idiom

a heavy heart

深深的悲伤或痛苦的感觉
Meaning
a feeling of deep sadness or sorrow
Example
She left her hometown with **a heavy heart**.
她带着沉重的心情离开了她的家乡。
idiom

a light at the end of the tunnel

表示情况很快会有所改善的迹象；在困难情况下的希望
Meaning
a sign that a situation will improve soon; hope in a difficult situation
Example
After months of hard work, she finally saw **a light at the end of the tunnel**.
经过几个月的努力工作后，她终于看到了**隧道尽头的光**。
idiom

at the eleventh hour

在最后时刻
Meaning
at the very last moment
Example
He submitted his assignment **at the eleventh hour**.
他在最后时刻提交了他的作业。
idiom

a learning curve

学习新事物的过程，尤其是需要时间和努力的过程
Meaning
the process of learning something new, especially one that requires time and effort
Example
There was a steep **learning curve** when I first started the project.
当我开始这个项目时，有一个陡峭的学习曲线。
idiom

a sound mind in a sound body

心理健康依赖于身体健康
Meaning
mental health depends on physical health
Example
**A sound mind in a sound body** is the key to a happy life.
健康的身体才有健康的心灵，这是通往幸福生活的关键。
idiom

apology accepted

用于表示你原谅某人
Meaning
used to say that you forgive someone
Example
Don’t worry, **apology accepted**.
别担心，原谅了
idiom

a blank canvas

可以自由发展的一个人或情况
Meaning
a person or situation that can be developed freely
Example
Starting a new project is like working with **a blank canvas**.
开始一个新项目就像与**一张空白画布**一起工作。
idiom

AI arms race

公司或国家之间在人工智能发展中争夺领导地位的竞争
Meaning
competition among companies or nations to lead in AI development
Example
Big tech companies are engaged in an **AI arms race**.
大型科技公司正在参与一场**AI军备竞赛**。
idiom

at the back of one's mind

一个人没有积极地去想但仍然意识到的事情
Meaning
something that one is not actively thinking about but is still aware of
Example
The fear of failure was always **at the back of his mind**.
对失败的恐惧总是在他的脑海深处。
idiom

a storybook ending

一个完美或幸福的结局，就像童话故事一样
Meaning
a perfect or happy ending, like in a fairy tale
Example
Their wedding was a true **storybook ending**.
他们的婚礼真是一个童话般的结局。
idiom

a shoulder to lean on

给予你支持和安慰的人
Meaning
someone to give you support and comfort
Example
She’s always been **a shoulder to lean on** for me.
她一直是我可以依靠的**肩膀**。
idiom

a smart cookie

一个非常聪明或有智慧的人
Meaning
a very clever or intelligent person
Example
Don’t underestimate her; she’s **a smart cookie**.
不要低估她; 她是 **一个聪明的饼干**。
idiom

ace the test

在考试或任务中表现出色
Meaning
to perform extremely well on an exam or task
Example
She **aced the test** and got the highest score.
她**考试通过**并获得了最高分。
idiom

a front-page story

一条重要到足以登上报纸头版的新闻
Meaning
a news story that is important enough to be placed on the front page of a newspaper
Example
The fire in the city center was **a front-page story** for the national newspapers.
市中心的火灾是全国报纸的头版新闻。
idiom

a game plan

策略或行动计划
Meaning
a strategy or plan of action
Example
We need a clear **game plan** before we start the meeting.
我们在开始会议之前需要一个清晰的游戏计划
idiom

at peace with oneself

感到平静并接受自己
Meaning
feeling calm and accepting of oneself
Example
She felt **at peace with herself** after making the decision.
做出决定后，她感到**与自己和解**。
idiom

act on

根据信息采取行动
Meaning
to respond to information with action
Example
We need to **act on** the survey results immediately.
我们需要立即对调查结果采取行动。
idiom

a mind is a terrible thing to waste

不使用你的智力是一种浪费
Meaning
it is a waste not to use your mental abilities
Example
You should keep learning, **a mind is a terrible thing to waste**.
你应该继续学习，**思想是一种可怕的浪费**。
idiom

a double-edged sword

既有正面又有负面后果的事物
Meaning
something that has both positive and negative consequences
Example
The internet is **a double-edged sword**; it provides vast information but also exposes us to privacy risks.
互联网是**a double-edged sword**; 它提供了大量的信息，但也使我们面临隐私风险。
idiom

A Pandora’s box

无尽麻烦或复杂问题的来源。
Meaning
A source of endless complications or trouble.
Example
Discussing that topic will open a **Pandora’s box** of complaints.
讨论那个话题会打开一个潘多拉的盒子，引发很多抱怨。
idiom

a tough call

nán de juédìng
Meaning
a difficult decision to make
Example
Choosing between the two offers was **a tough call**.
Zài liǎng gè tíyì zhī jiān xuǎnzé shì nán de juédìng.
idiom

A political animal

一个非常感兴趣并且有才华的人
Meaning
A person who is very interested in politics and has a talent for it
Example
He’s known to be a real **political animal**.
他以一个真正的**政治动物**而闻名。
idiom

a weak link

系统或小组中最不可靠或最不安全的部分
Meaning
the least reliable or secure part of a system or group
Example
One careless employee can be **a weak link** in the security chain.
一个不小心的员工可能是安全链中的**薄弱环节**。
idiom

a feather in one’s cap

值得骄傲的成就
Meaning
an achievement to be proud of
Example
Winning the national award was **a feather in his cap**.
赢得全国奖项是他值得骄傲的成就。
idiom

a foot in the door

有一个小的机会开始在公司或行业工作
Meaning
to have a small opportunity to start working in a company or industry
Example
An internship is a great way to get **a foot in the door**.
实习是一个获得**工作机会**的好方式。
idiom

a shot in the arm

给人鼓励或能量的东西
Meaning
something that gives encouragement or energy
Example
The new funding was **a real shot in the arm** for the project.
新的资金对项目来说是**真正的强心针**。
idiom

a masterpiece

一件杰出的艺术作品或成就
Meaning
an outstanding work of art or achievement
Example
Her latest sculpture is truly **a masterpiece**.
她的最新雕塑真的是**一件杰作**。
idiom

as free as a bird

完全自由；无忧无虑
Meaning
completely free; without worries
Example
After the exams, I felt **as free as a bird**.
考试后，我感到完全自由。
idiom

a brush with fame

与名人短暂的相遇或经历
Meaning
a brief encounter or experience with a famous person
Example
During the exhibition, I had **a brush with fame** when I met a renowned painter.
在展览期间，我与一位著名画家见面，算是一次**与名气的擦肩而过**。
idiom

add insult to injury

让糟糕的情况变得更糟
Meaning
to make a bad situation even worse
Example
First, they lost the game, and then, to **add insult to injury**, their bus broke down.
首先，他们输了比赛，然后，**雪上加霜**，他们的公交车坏了。
idiom

a light bulb moment

突然的灵感或顿悟的时刻
Meaning
a moment of sudden inspiration or realization
Example
She had **a light bulb moment** during the meeting.
她在会议期间突然灵光一现。
idiom

A Scrooge

一个非常吝啬或小气的人。
Meaning
A very stingy or miserly person.
Example
Don’t be **a Scrooge**—it’s Christmas!
别做吝啬鬼——现在是圣诞节！
idiom

a friend in need is a friend indeed

真正的朋友是在困难时帮助你的人
Meaning
a true friend helps you in difficult times
Example
When I was sick, Jane took care of me—**a friend in need is a friend indeed**.
我生病时，简照顾了我——患难见真情。
idiom

A battle of wits

一个人们用智慧或聪明才智相互较量的比赛或情况。
Meaning
A contest or situation where people use intelligence or cleverness to outsmart each other.
Example
The negotiations were a true **battle of wits** between the two leaders.
这次谈判是两位领导人之间真正的**智慧较量**。
idiom

answer for

对某事负责，并就此向他人解释
Meaning
to be responsible for something and answer to others about it
Example
She had to **answer for** the mistakes made by her team.
她必须为她团队所犯的错误**负责**。
idiom

a brainwave

一个突然聪明的主意或解决方案
Meaning
a sudden clever idea or solution
Example
I had **a brainwave** and realized how to fix the issue.
我有了**一脑波**，并意识到如何解决这个问题。
idiom

a lawyer's brief

一个摘要或简明陈述一个论点或案件
Meaning
a summary or concise statement of an argument or case
Example
The **lawyer's brief** was submitted to the judge before the trial began.
**律师的摘要** 在审判开始前提交给法官。
idiom

a well-oiled machine

一个高效且顺畅协作的小组
Meaning
a group that works efficiently and smoothly together
Example
Our team worked like **a well-oiled machine** during the event.
我们的团队在活动中像**一台润滑良好的机器**一样工作。
idiom

answer for something

对发生的坏事负责
Meaning
to be responsible for something bad that happens
Example
You’ll have to **answer for your actions** if things go wrong.
如果事情出了问题，你必须为你的行为负责。
idiom

a walking encyclopedia

一个知道很多关于许多主题的人
Meaning
a person who knows a lot about many subjects
Example
Ask him anything about history—he’s **a walking encyclopedia**.
问他任何关于历史的事情——他是**一本行走的百科全书**。
idiom

A team player

在团队中能与他人合作良好的人。
Meaning
Someone who works well with others in a group.
Example
John is **a team player** who always supports his colleagues.
约翰是一个**团队成员**，总是支持他的同事。
idiom

at your breaking point

由于压力而接近失控的边缘
Meaning
to be very close to losing control due to stress
Example
After months of overwork, she was **at her breaking point**.
经过几个月的超时工作后，她已经**接近崩溃的临界点**。
idiom

a problem shared is a problem halved

讨论问题让它更容易解决
Meaning
discussing a problem makes it easier to solve
Example
Don't hesitate to ask for help. **A problem shared is a problem halved**.
不要犹豫请求帮助。**一个共享的问题是一个减轻的问题**。
idiom

a snowball's chance in hell

完全没有机会
Meaning
no chance at all
Example
He has **a snowball's chance in hell** of winning the lottery.
他没有赢得彩票的机会。
idiom

a trusted ally

一个可以信任并且可靠的人或团体
Meaning
a person or group that is trusted and reliable
Example
She has always been **a trusted ally** in our business ventures.
她一直是我们商业计划中的**一个可信赖的盟友**。
idiom

A giant leap

一个重要的进步或成就。
Meaning
A significant advancement or achievement.
Example
Landing on the moon was **a giant leap** for mankind.
登月是人类的一大飞跃。
idiom

a house divided against itself cannot stand

一个团体或组织在意见或方向上分裂，无法成功
Meaning
a group or organization that is divided in opinion or direction cannot succeed
Example
In a team, **a house divided against itself cannot stand**; everyone needs to agree on the same goal.
在一个团队里，**一间房子分对自己并不能站立**; 每个人都应该对同一个目标共识。
idiom

a taste of your own medicine

体验你曾经给别人带来的不愉快
Meaning
to experience the same unpleasantness you caused to others
Example
He was rude to everyone, but now he’s getting **a taste of his own medicine**.
他曾经对每个人都很粗鲁，但现在他正在体验**他自己的药**。
idiom

a paradigm shift

方法或基本假设的根本变化
Meaning
a fundamental change in approach or underlying assumptions
Example
The invention of the internet marked a **paradigm shift** in communication and information sharing.
互联网的发明标志着通信和信息共享的**范式转变**。
idiom

a leopard can't change its spots

一个人不能改变他们与生俱来的本性或特征
Meaning
someone cannot change their inherent nature or characteristics
Example
No matter how hard he tries, **a leopard can't change its spots**.
不管他怎么努力，一只豹子不能改变它的斑点。
idiom

a chapter of one’s life

人生中的一个阶段或时期
Meaning
a period or stage in someone’s life
Example
Leaving college was the end of an important **chapter of her life**.
离开大学是她人生中一个重要篇章的结束。
idiom

a Eureka moment

突然的发现或顿悟时刻
Meaning
a moment of sudden discovery or realization
Example
He had **a Eureka moment** when he solved the equation.
他在解决方程时经历了**尤里卡时刻**。
idiom

as thick as two short planks

非常愚蠢或迟钝
Meaning
very stupid or slow-witted
Example
He’s **as thick as two short planks**, bless him.
他**像两块短木板一样愚蠢**，祝福他。
idiom

an open book

一个容易理解或非常诚实的人
Meaning
someone who is easy to understand or very honest
Example
He’s **an open book**; you can always tell what he’s thinking.
他是一本打开的书；你总能知道他在想什么。
idiom

a full plate

非常忙或有很多事情要做
Meaning
to be very busy or have many things to do
Example
I can’t join the trip now; I’ve got **a full plate**.
我现在不能参加旅行；我有**很多事情要做**。
idiom

As far as I can tell

根据我理解的；根据我知道的
Meaning
As I understand; based on what I know
Example
As far as I can tell, everything is fine.
根据我理解的，一切都很好。
idiom

a cold war

没有公开战争的政治敌对状态
Meaning
a state of political hostility without open warfare
Example
The two nations seem to be entering **a cold war** again.
这两个国家似乎又进入了一场冷战。
idiom

a penny for your thoughts

询问某人在想什么的一种方式
Meaning
a way of asking someone what they are thinking about
Example
You look lost in thought — **a penny for your thoughts**?
你看起来心事重重——在想什么？
idiom

artificial intelligence

机器中人类智能的模拟，编程使其能够思考和学习。
Meaning
The simulation of human intelligence in machines that are programmed to think and learn.
Example
The company has invested heavily in **artificial intelligence** to enhance automation.
公司已经在**人工智能**方面进行了大量投资，以增强自动化。
idiom

a job well done

一项成功完成的任务
Meaning
a task completed with great success
Example
The project was completed ahead of schedule, truly **a job well done**.
项目提前完成，真的**做得很好**。
idiom

a man of faith

一个坚信某个宗教或原则的人
Meaning
a person who strongly believes in a particular religion or principle
Example
He is known as **a man of faith** in his community.
他在他的社区被称为**信仰之人**。
idiom

a kind heart

一个慷慨而关心他人的人
Meaning
a person who is generous and caring
Example
Her **kind heart** is what makes her loved by everyone.
她的**善良的心**使她深受大家喜爱。
idiom

agree to disagree

接受你有不同的观点并停止争论
Meaning
to accept that you have different opinions and stop arguing
Example
We’ll just **agree to disagree** on this topic.
我们只需在这个话题上**同意不同意**。
idiom

a miscarriage of justice

法院作出的错误或不公平的决定
Meaning
a wrong or unfair decision by a court
Example
The innocent man’s imprisonment was **a miscarriage of justice**.
无辜男子的监禁是**司法的不公**。
idiom

A truth universally acknowledged

一个普遍接受的真理。
Meaning
A widely accepted truth or belief.
Example
**A truth universally acknowledged** is that honesty is important.
**一个普遍接受的真理** 是诚实很重要。
idiom

a tough act to follow

某事如此令人印象深刻，以至于其他人难以匹配或超越
Meaning
something so impressive that others find it hard to match or surpass
Example
His last performance was **a tough act to follow**.
他的最后一次表演是**一个难以超越的精彩表演**。
idiom

a ray of hope

可能成功或改善的一个小迹象
Meaning
a small sign of possible success or improvement
Example
The new treatment gave patients **a ray of hope**.
新的治疗给患者带来了**希望的光芒**。
idiom

a clean slate

一个崭新的开始; 有机会重新开始，而不犯以前的错误
Meaning
a fresh start; an opportunity to begin again without past mistakes
Example
He moved to a new city for **a clean slate**.
他为了**全新的开始**搬到了一个新城市。
idiom

a chain is only as strong as its weakest link

一个团体的力量取决于最弱的成员
Meaning
the strength of a group depends on the weakest member
Example
In any team, **a chain is only as strong as its weakest link**.
在任何团队中，**链条的强度取决于最弱的环节**。
idiom

A pack of lies

一整套虚假的陈述。
Meaning
A complete set of false statements.
Example
His excuse was nothing but **a pack of lies**.
他的借口不过是**一包谎言**。
idiom

a people person

喜欢与他人在一起并交谈的人
Meaning
someone who enjoys being with and talking to other people
Example
Maria is **a people person**, she makes friends everywhere she goes.
玛丽亚是一个善于交际的人，她到哪里都能交到朋友
idiom

a heart of steel

一个情感上坚强且不屈的人
Meaning
someone who is emotionally strong and unyielding
Example
Despite all the challenges, he handled everything with **a heart of steel**.
尽管面临所有挑战，他以**铁一般的心脏**应对了一切。
idiom

a helping hand

帮助或协助他人的人
Meaning
someone who helps or assists others
Example
She offered **a helping hand** to the new student in class.
她为班级里的新学生提供了**一只援助之手**。
idiom

a flash in the pan

一开始看起来有希望但最终失败的东西
Meaning
something that seems promising at first but fails to deliver
Example
The peace talks were just **a flash in the pan**.
和平谈判只是**昙花一现**。
idiom

as fit as a fiddle

对某事感到非常厌烦或恼火
Meaning
in very good health
Example
My grandfather is 80 but still **as fit as a fiddle**.
我已经厌倦了听他的借口。
idiom

a drama queen

一个夸大其词或对情况过度反应的人
Meaning
someone who exaggerates or overreacts to situations
Example
Stop acting like **a drama queen**; it’s not that serious.
别像一个戏剧女王一样表现; 事情没有那么严重。
idiom

a shoulder to cry on

当你难过时，能听你倾诉并支持你的人
Meaning
someone who listens and supports you when you are sad
Example
She has always been **a shoulder to cry on** when I needed help.
当我需要帮助时，她总是**一个可以哭诉的肩膀**。
idiom

artificial empathy

人工智能模仿或模拟人类情感的能力
Meaning
AI's ability to simulate or mimic human emotions
Example
The robot therapist shows **artificial empathy** during sessions.
机器人治疗师在会话中展示**人工同理心**。
idiom

a bright spark

聪明且聪慧的人；有原创想法的人
Meaning
a clever and intelligent person; someone with original ideas
Example
He's such **a bright spark**; he always finds innovative solutions.
他真是个聪明的人；总是能找到创新的解决办法。
idiom

add fuel to the fire

使糟糕的情况变得更糟
Meaning
to make a bad situation worse
Example
Your comments **added fuel to the fire**.
你的评论让情况更糟了。
idiom

a picture is worth a thousand words

一张图片可以比文字更好地表达复杂的想法
Meaning
a visual image can express complex ideas better than words
Example
That photo truly proves that **a picture is worth a thousand words**.
那张照片真正确认了**一张图片胜过千言万语**
idiom

a catnap

小睡一会儿
Meaning
a short, light sleep
Example
I took **a catnap** after lunch.
我在午饭后小睡了一会儿。
idiom

ask around

向多个人询问
Meaning
to inquire with several people
Example
I’ll **ask around** to see who can cover the shift.
我会 **向多个人询问** 看谁能替我顶班。
idiom

As I see it

根据我的理解或意见
Meaning
According to my understanding or opinion
Example
As I see it, we need to try a different strategy.
在我看来，我们需要尝试不同的策略。
idiom

A scoop

一条独家的新闻
Meaning
An exclusive piece of news
Example
The journalist got **a scoop** about the minister’s resignation.
记者得到了有关部长辞职的**独家新闻**。
idiom

art for art’s sake

艺术应因其美而被重视，而非出于任何道德或政治目的
Meaning
art should be valued for its beauty and not for any moral or political purpose
Example
He believes in **art for art’s sake**, not propaganda.
他相信**为了艺术而艺术**，而不是宣传。
idiom

a heart of gold

一个非常友善和关心他人的人
Meaning
someone who is very kind and caring
Example
She has **a heart of gold**, always helping anyone in need.
她有**一颗金子般的心**，总是帮助有需要的人。
idiom

a crash course

短期强化学习课程
Meaning
a short and intensive course of study
Example
I had to take a **crash course** in programming before starting the job.
在开始工作之前，我不得不参加一个编程**速成课程**。
idiom

a ray of sunshine

给人带来幸福的人或事
Meaning
someone or something that brings happiness
Example
Her smile is **a ray of sunshine** on a gloomy day.
她的笑容是**阴暗日子里的阳光**。
idiom

a close call

一个灾难或事故险些发生的情况。
Meaning
A situation where a disaster or accident was narrowly avoided.
Example
That was **a close call** — the car almost hit us!
那真是**千钧一发** — 车差点撞到我们！
idiom

a thing of the past

不再存在或发生的事情
Meaning
something that no longer exists or happens
Example
With smartphones, landline phones are **a thing of the past**.
有了智能手机，座机电话成了**过去的事情**。
idiom

a quick study

一个快速学习的人
Meaning
someone who learns new things very fast
Example
She’s **a quick study** and mastered the topic in a day.
她很快学习并在一天内掌握了这个话题。
idiom

a slow learner

一个理解或学习事物较慢的人
Meaning
someone who takes time to understand or learn things
Example
Don’t worry if you need more time—you’re just **a slow learner**.
如果你需要更多时间，别担心——你只是一个**慢学习者**。
idiom

Above reproach

完全诚实且没有缺陷。
Meaning
Completely honest and without fault.
Example
Her integrity is **above reproach**.
她的诚信无可挑剔。
idiom

above the law

不受法律约束；认为自己无法被规则触及
Meaning
not subject to the law; thinking one is untouchable by rules
Example
Some powerful people act as if they are **above the law**.
一些有权势的人表现得像他们 **高于法律**。
idiom

a universe of possibilities

无尽的机会或选择
Meaning
endless opportunities or options
Example
Technology has opened **a universe of possibilities**.
技术开启了**无限的可能性**。
idiom

a steep learning curve

当某事很难学习，通常是迅速的
Meaning
when something is difficult to learn, usually quickly
Example
The new software had a **steep learning curve**, but I managed to understand it.
新软件有一个**陡峭的学习曲线**，但我设法理解了它。
idiom

a smooth sea never made a skilled sailor

挑战和困难让人变得更强大，更有经验。
Meaning
Challenges and difficulties make people stronger and more experienced.
Example
Remember, **a smooth sea never made a skilled sailor**—you’ll learn from tough times.
记住，**平静的海洋从未造就过一个熟练的水手** — 你会从困难时光中学习。
idiom

a dime a dozen

非常常见且不值钱
Meaning
very common and not valuable
Example
Those toys are **a dime a dozen** at the market.
那些玩具在市场上非常常见。