saber rattling
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idiom

saber rattling

以军事行动威胁他人以示威慑
Meaning
threatening military action to intimidate others
Example
The country’s recent **saber rattling** alarmed its neighbors.
该国最近的 **saber rattling** 让邻国感到不安。
idiom

be in the driver’s seat

控制局势
Meaning
to be in control of a situation
Example
After the merger, our company is **in the driver’s seat**.
合并后，我们公司处于**驾驶员座位**。
idiom

talk nineteen to the dozen

说话非常快而且不停
Meaning
to talk very quickly and without stopping
Example
Once she starts, she **talks nineteen to the dozen**.
她一开始就**不停地说话**。
idiom

overfitting

当一个模型在训练数据上表现良好，但在未见过的数据上表现差
Meaning
when a model performs well on training data but poorly on unseen data
Example
The model seems to be **overfitting** because it performs well on the training data but poorly on the test set.
模型似乎在**过拟合**，因为它在训练数据上表现良好，但在测试集上表现差。
idiom

fight tooth and nail

拼命地奋斗，毫不退缩
Meaning
to fight very fiercely or with great determination
Example
They **fought tooth and nail** to protect their rights.
他们拼尽全力保护自己的权利。
idiom

join forces

为了共同的目标而联合起来
Meaning
to combine efforts with others for a common purpose
Example
Two companies **joined forces** to create a better product.
两家公司联合起来创造出更好的产品。
idiom

change of heart

对某事或某人感受的变化
Meaning
a change in the way one feels about something or someone
Example
He had a **change of heart** and decided to stay.
他改变了主意，决定留下。
idiom

the ball is in your court

现在轮到你做决定或采取行动
Meaning
it is your turn to make a decision or take action
Example
I've made my offer, now **the ball is in your court**.
我已经提出了我的报价，现在**球在你的场地**。
idiom

cut through the red tape

去除官僚障碍或延误
Meaning
to remove bureaucratic obstacles or delays
Example
The new policy helps **cut through the red tape** and speed up approvals.
新政策有助于去除官僚障碍并加快审批。
idiom

in the black

盈利；财务稳定
Meaning
making a profit; financially stable
Example
Our company is finally **in the black** after two years.
我们公司在两年后终于**盈利了**。
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

make an example of someone

惩罚某人以警告他人
Meaning
to punish someone to warn others
Example
The boss **made an example of** the dishonest employee.
老板以惩罚不诚实的员工来警告其他人。
idiom

nudge into

轻轻地鼓励某人做某事
Meaning
to gently encourage someone toward something
Example
They **nudged her into** presenting at the meetup.
他们轻推她在聚会上做演讲。
idiom

Bet your bottom dollar

对某事非常确定或自信。
Meaning
To be very sure or confident about something.
Example
You can **bet your bottom dollar** that he’ll show up late again.
你可以**打赌你最后一块钱**他又会迟到。
idiom

Down the rabbit hole

陷入一个奇怪、复杂或离奇的境地。
Meaning
Entering into a strange, complicated, or bizarre situation.
Example
I went **down the rabbit hole** researching ancient myths.
我在研究古代神话时陷入了 **down the rabbit hole**。
idiom

talk at cross purposes

在谈论不同的事情时误解彼此
Meaning
to misunderstand each other when talking about different things
Example
I think we’re **talking at cross purposes**—I meant next week, not this one.
我认为我们**在各自说错话**——我指的是下周，不是这一周。
idiom

A negative outlook

悲观的态度或观点
Meaning
A pessimistic attitude or perspective
Example
He always has **a negative outlook** on life.
他对生活总是持悲观态度。
idiom

burn one’s fingers

因为自己的错误而受苦
Meaning
to suffer because of one’s own mistake
Example
He **burned his fingers** by investing in a risky business.
他因为投资于一个冒险的生意而受到了损失。
idiom

follow your heart

根据你的感受做出决定
Meaning
to make a decision based on your feelings
Example
When choosing a career, it’s best to **follow your heart**.
选择职业时，最好**跟随你的心**。
idiom

cry one’s heart out

因悲伤而痛哭
Meaning
to cry very hard due to sadness
Example
She **cried her heart out** after the breakup.
她在分手后痛哭流涕。
idiom

it's a piece of cake

这很容易
Meaning
it's very easy
Example
The exam was **a piece of cake**.
考试很容易。
idiom

low-hanging fruit

容易实现或达到的事情
Meaning
something easy to achieve or target
Example
We should focus on the **low-hanging fruit** before tackling bigger goals.
我们应该先关注那些**容易实现的目标**，然后再处理更大的目标。
idiom

to put all your eggs in one basket

将所有的风险押注在一个冒险或决策上
Meaning
to risk everything on a single venture or decision
Example
I wouldn’t suggest **putting all your eggs in one basket** with this investment.
我不会建议在这项投资中**将所有的鸡蛋放在一个篮子里**。
idiom

out of the woods

不再处于危险或困难之中
Meaning
no longer in danger or difficulty
Example
She’s recovering now, so she’s **out of the woods**.
她现在正在康复，所以她已经脱离危险。
idiom

lost in the moment

完全沉浸在你正在做的事情中
Meaning
to be completely absorbed in what you’re doing
Example
She was **lost in the moment** while painting her favorite landscape.
她在画她最喜欢的风景时，完全沉浸在那个时刻。
idiom

ride out

在困难的情况下生存
Meaning
to survive a difficult situation
Example
We managed to **ride out** the storm without damage.
我们成功地度过了风暴，没有造成损害。
idiom

rocket science

非常复杂或难以理解的事物
Meaning
something very complicated or difficult to understand
Example
Coding isn’t **rocket science** if you practice regularly.
如果你定期练习，编程就不是**火箭科学**。
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

heart sinks

突然感到失望或悲伤
Meaning
to feel disappointed or sad suddenly
Example
My **heart sank** when I saw the exam result.
当我看到考试结果时，我的心沉了下来。
idiom

hands are tied

由于规则或限制而无法自由行动
Meaning
to be unable to act freely because of rules or restrictions
Example
The government’s **hands are tied** due to international trade laws.
由于国际贸易法的限制，政府的双手被束缚。
idiom

a pipe dream

一个不现实或不可能的梦想
Meaning
an unrealistic or impossible dream
Example
Owning a private island is just **a pipe dream** for most people.
拥有一个私人岛屿对大多数人来说只是 **一个不现实的梦想**。
idiom

hit it off

迅速而轻松地成为朋友
Meaning
to become friends quickly and easily
Example
They **hit it off** right after being introduced.
他们在介绍后立即成为了朋友。
idiom

burst with joy

高兴得难以抑制情感
Meaning
to be so happy that it’s hard to contain emotions
Example
The parents **burst with joy** when their child won the prize.
当孩子赢得奖项时，父母**高兴得合不拢嘴**。
idiom

on the stand

作为证人在法庭上作证
Meaning
testifying as a witness in court
Example
She was nervous when she was **on the stand**.
她在 **证人席** 上时感到很紧张。
idiom

chase your dreams

积极努力实现你的雄心
Meaning
to actively try to achieve your ambitions
Example
You should always **chase your dreams** no matter how hard it seems.
无论多么困难，你都应该始终**追求你的梦想**。
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

Dig deeper

更彻底地调查或发现更多细节。
Meaning
To investigate more thoroughly or find out more details.
Example
Journalists are trained to **dig deeper** into stories.
记者们接受了**更深入挖掘**故事的训练。
idiom

run in the family

一个许多家庭成员共享的特征
Meaning
a characteristic that many members of a family share
Example
Good looks **run in the family** — all of them are beautiful!
好看是**run in the family** — 他们都很漂亮！
idiom

ground control

管理情况的权威或人们
Meaning
authority or people managing a situation
Example
In this project, Sarah is **ground control**.
在这个项目中，Sarah 是控制中心。
idiom

out of sorts

感到稍微不舒服或不高兴
Meaning
feeling slightly unwell or upset
Example
He’s been **out of sorts** since he caught that cold.
自从感冒后，他就一直有些不高兴。
idiom

take responsibility

对你做过的事或你负责的事情负责。
Meaning
to be accountable for something you did or are in charge of.
Example
You need to **take responsibility** for your actions.
你需要为你的行为**承担责任**。
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

no such luck

当期望的事情没有发生时使用
Meaning
used when something hoped for did not happen
Example
I hoped to win the lottery, but **no such luck**.
我希望赢得彩票，但**no such luck**。
idiom

tiger mom

一位严格的母亲，她推动孩子们达到高标准
Meaning
a strict mother who pushes her children to achieve high standards
Example
Her friends call her a **tiger mom** because she’s very demanding.
她的朋友们称她为**老虎妈妈**，因为她要求很高。
idiom

As cool as a cucumber

非常冷静和放松。
Meaning
Very calm and relaxed.
Example
Even in stressful situations, she stays **as cool as a cucumber**.
即使在紧张的情况下，她也能保持镇定自若。
idiom

Economic bubble

一种资产价格远远高于其真实价值的情况。
Meaning
A situation where asset prices rise far above their real value.
Example
The housing **economic bubble** burst in 2008, causing a global crisis.
2008年住房经济泡沫破裂，引发了全球危机。
idiom

pumped up

充满活力和兴奋
Meaning
full of energy and excitement
Example
He was **pumped up** before the big presentation.
在大演示之前，他充满了激动。
idiom

drift apart

随着时间的推移，慢慢变得不再亲密或连接
Meaning
to slowly become less close or connected over time
Example
After college, they gradually **drifted apart**.
大学毕业后，他们渐渐地**疏远**了。
idiom

not the sharpest tool in the shed

不是很聪明
Meaning
not very intelligent
Example
He’s kind but **not the sharpest tool in the shed**.
他很友好，但**不是最聪明的**。
idiom

a black hole

一个地方或情况，事情丢失后再也找不到
Meaning
a place or situation where things are lost, never to be found again
Example
The document I was looking for seems to have disappeared into **a black hole**.
我找的文件似乎已经消失在**黑洞**里了。
idiom

empty nest

一个孩子长大并离开的家
Meaning
a home where the children have grown up and left
Example
After her kids moved out, she felt the **empty nest** syndrome.
在她的孩子搬出去后，她感到了**empty nest**综合症。
idiom

train your brain

锻炼并提高自己的认知能力
Meaning
to practice and improve one’s cognitive abilities
Example
Use puzzles to **train your brain** like an AI model.
用拼图来像人工智能模型一样训练你的大脑。
idiom

take heart

感到鼓舞或更自信
Meaning
to feel encouraged or more confident
Example
You should **take heart**; things will get better soon.
你应该**鼓起勇气**; 很快事情会变得更好。
idiom

cover all the bases

为每个可能的情况做好准备
Meaning
to prepare for every possible situation
Example
We need to **cover all the bases** before the meeting.
我们需要在会议之前做好准备。
idiom

slip into

逐渐进入某种状态或开始穿戴某物
Meaning
to gradually enter a state or start wearing something
Example
She quickly **slipped into** a more comfortable outfit.
她迅速**滑入**了更舒适的服装。
idiom

own it

为你是谁或你做的事而感到骄傲
Meaning
to take pride in who you are or what you do
Example
Don’t be shy about your success—**own it**!
不要因你的成功而感到害羞——**自豪吧**！
idiom

gain ground

取得进展或前进
Meaning
to make progress or advance
Example
The company has been **gaining ground** in the tech industry.
该公司在科技行业**取得进展**。
idiom

take the scenic route

选择一条更长或更美的路线旅行
Meaning
to choose a longer or more beautiful way to travel
Example
Let’s **take the scenic route** through the mountains.
让我们沿着山间的风景路线走吧。
idiom

get your point across

清楚地表达一个想法，让别人理解
Meaning
to express an idea clearly so that others understand it
Example
It’s important to **get your point across** during discussions.
在讨论中**清楚地表达你的观点**很重要。
idiom

In for the long haul

准备长时间做某事。
Meaning
Prepared to continue something for a long time.
Example
He knew that success would take years, but he was **in for the long haul**.
他知道成功需要多年，但他已经准备好**长期奋斗**。
idiom

set your sights high

瞄准有抱负的目标
Meaning
to aim for something ambitious
Example
Always **set your sights high** if you want to grow.
如果你想成长，始终设定高目标。
idiom

Move fast and break things

快速创新，即使在过程中出现错误。
Meaning
To innovate quickly, even if mistakes happen along the way.
Example
Our CEO encourages us to **move fast and break things** to stay ahead of competitors.
我们的 CEO 鼓励我们 **快速行动并破坏事物**，以便领先于竞争对手。
idiom

A pretty picture

一个愉快或理想的情况；通常用于讽刺
Meaning
A pleasant or ideal situation; often used ironically
Example
This isn’t **a pretty picture** – we need to fix these problems.
这不是**一幅美丽的画面** – 我们需要解决这些问题。
idiom

top-notch

最高质量的; 极好的
Meaning
of the highest quality; excellent
Example
Your presentation was absolutely **top-notch**.
你的演讲绝对是顶级的。
idiom

warp speed

非常高的速度；极快的进展
Meaning
very high speed; extremely fast progress
Example
The project is moving at **warp speed** now.
该项目现在正在以速战速决的速度推进。
idiom

Take it easy

放松，不要太担心。
Meaning
To relax and not worry too much.
Example
**Take it easy**, everything will be fine.
放松，一切都会好起来的。
idiom

book smart

从学习中获得知识而不是从经验中获得的人
Meaning
knowledgeable from studying rather than experience
Example
He’s **book smart** but lacks practical experience.
他很有书本知识，但缺乏实际经验。
idiom

all in the same boat

处于相同的情况或面临相同的挑战
Meaning
in the same situation or facing the same challenges
Example
We're all **in the same boat**, so let's work together to solve this problem.
我们都**在同一条船上**，所以让我们一起合作解决这个问题。
idiom

kindness goes a long way

一小个善举可能带来巨大的积极影响
Meaning
a small act of kindness can have a big positive impact
Example
Remember, **kindness goes a long way** in building good relationships.
记住，**善良有很大的作用**在建立好关系时。
idiom

glue together

用胶水牢牢粘合部分
Meaning
to attach pieces firmly using adhesive
Example
Let the students **glue together** the collage pieces.
让学生们**用胶水粘合**拼贴画的部分。
idiom

mind your peace and quiet

保护你的平静，避免压力或干扰
Meaning
to protect your calm and avoid stress or disturbance
Example
She values her alone time to **mind her peace and quiet**.
她喜欢独处，保持平静，避免压力或干扰。
idiom

trust someone with something

把重要的事情交给某人负责
Meaning
to give someone responsibility for something important
Example
I trust you to **take care of the project**.
我相信你会**负责这个项目**。
idiom

sitting on the fence

避免站队或做决定
Meaning
to avoid taking sides or making a decision
Example
He is **sitting on the fence** about the new policy.
他对新政策没有表态。
idiom

start off on the right foot

以积极或良好的方式开始某事
Meaning
to begin something well or positively
Example
I want to **start off on the right foot** with my new job.
我希望在我的新工作中有一个好的开始。
idiom

push your luck

冒险希望获得更多成功
Meaning
take a risk hoping for more success
Example
You already got a discount, don’t **push your luck**.
你已经获得了折扣，不要再 **试探运气**。
idiom

speak of the devil

刚说到某人，他就出现了
Meaning
said when someone appears just as you mention them
Example
**Speak of the devil**, here comes John now!
**说曹操曹操到**，约翰来了！
idiom

You can say that again

用于强烈同意某人
Meaning
Used to strongly agree with someone
Example
‘It’s been a long day.’ ‘**You can say that again!**’
‘今天真是漫长的一天。’ ‘**你说得对！**’
idiom

separate the wheat from the chaff

区分有价值和无价值的东西
Meaning
to distinguish valuable things from worthless ones
Example
It’s time to **separate the wheat from the chaff** in this project.
现在是时候在这个项目中**将麦子和糠分开**了。
idiom

see the light

最终理解或接受真相或新观念
Meaning
to finally understand or accept the truth or a new idea
Example
After years of denial, he finally **saw the light**.
经过多年的否认，他终于看到了真相。
idiom

pull the strings

秘密地控制或影响某人或某事
Meaning
to control or influence someone or something secretly
Example
He got the job because his uncle **pulled the strings**.
他得到了这份工作，因为他的叔叔**拉了后退的线**。
idiom

switch on

打开某物以便其运作
Meaning
to turn something on so it operates
Example
Please **switch on** the lights before the clients arrive.
请在客户到达之前打开灯光。
idiom

hit a bump in the road

遇到暂时的问题或挫折
Meaning
to face a temporary problem or setback
Example
Our project **hit a bump in the road**, but we'll recover soon.
我们的项目**hit a bump in the road**，但我们很快就能恢复。
idiom

grin from ear to ear

因为高兴而露出灿烂的笑容
Meaning
to smile broadly because of happiness
Example
She was **grinning from ear to ear** after the compliment.
她在收到夸奖后笑得合不拢嘴。
idiom

lay the blame on

指责某人对某件坏事负责
Meaning
to accuse someone of being responsible for something bad.
Example
They tried to **lay the blame on** the new employee.
他们试图将责任归咎于新员工。
idiom

get ahead in life

在一个人的生活或职业中取得成功或进步
Meaning
to succeed or progress in one's life or career
Example
He worked hard to **get ahead in life** and build a successful career.
他努力工作，**在人生中取得进展**并建立了成功的职业。
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

steal the show

成为最杰出的表演者
Meaning
to be the most outstanding performer
Example
Her performance **stole the show** last night.
她的表演 **抢了所有的风头** 昨晚。
idiom

stoic calm

在困难或压力大的情况下保持冷静
Meaning
to remain calm in difficult or stressful situations
Example
Even during the crisis, she maintained **stoic calm**.
即使在危机时，她也保持了**stoic calm**。
idiom

road to success

通向成功的道路或行为
Meaning
the path or actions that lead to achievement
Example
Hard work is the **road to success**.
努力工作是通向成功的道路。
idiom

rule of thumb

基于经验的一般实践原则
Meaning
a general practical principle based on experience
Example
As a **rule of thumb**, I double-check every document.
作为一条经验法则，我会对每份文件进行双重检查。
idiom

get a handle on something

理解或控制某事
Meaning
to understand or gain control of something
Example
I'm trying to **get a handle on** the new software.
我正在努力理解新软件。
idiom

hang on

等一下
Meaning
to wait for a short time
Example
**Hang on** a minute, I’ll be right back.
等一下，我马上回来。
idiom

up to speed

拥有最新的信息或完全知情
Meaning
to have the latest information or be fully informed
Example
I’ll get you **up to speed** on the new system tomorrow.
我明天会让你**了解情况**关于新系统。
idiom

fall out with

与某人争吵或不再是朋友
Meaning
to argue or stop being friends with someone
Example
They **fell out with** each other over money.
他们因为钱 **闹翻了**。
idiom

hit a snag

遇到意外问题或障碍
Meaning
to face an unexpected problem or obstacle
Example
The project **hit a snag** when the server went down.
当服务器宕机时，项目**hit a snag**。
idiom

full steam ahead

全力以赴地前进
Meaning
to move forward with great energy or speed
Example
The team is going **full steam ahead** with the new logistics plan.
团队正全力以赴地推进新的物流计划。
idiom

make peace

结束分歧并重新成为朋友
Meaning
to end a disagreement and become friendly again
Example
The two families finally **made peace** after many years.
两家人经过多年终于和好了。
idiom

scared stiff

感到极度害怕
Meaning
to be extremely frightened
Example
I was **scared stiff** when I heard strange noises at night.
我听到夜晚的奇怪声音时吓坏了。
idiom

cross your mind

短暂地想到某事
Meaning
to think of something briefly
Example
It never **crossed my mind** that he could lie.
我从没想到他会撒谎。
idiom

down on your luck

经历一段倒霉时期
Meaning
experiencing a period of bad luck
Example
He’s been **down on his luck** since losing his job.
自从失业后，他一直处于倒霉时期。
idiom

brighten someone's day

让某人感到更开心
Meaning
to make someone feel happier
Example
Her kindness really **brightened my day**.
她的善良真的让我的一天更愉快。
idiom

architectural eye candy

某些在视觉上吸引人但可能缺乏实质或功能的东西
Meaning
something that is visually appealing but may lack substance or functionality
Example
The new skyscraper in the city is just **architectural eye candy**.
这座城市的新摩天大楼只是**建筑眼睛糖果**。
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

weakest link

系统或小组中最脆弱的部分
Meaning
the most vulnerable part of a system or group
Example
Human error is often the **weakest link** in cybersecurity.
人为错误常常是网络安全中的**最薄弱环节**。
idiom

smart cookie

聪明而机智的人
Meaning
a clever and intelligent person
Example
Don’t underestimate her—she’s a **smart cookie**.
不要低估她——她是一个**聪明的人**。
idiom

a fair game

一种双方都有平等机会成功或达成妥协的情况
Meaning
a situation where both parties have equal opportunities to succeed or compromise
Example
The terms of the contract were discussed until both sides agreed it was **a fair game**.
合同条款被讨论，直到双方都同意这是**a fer geim**。
idiom

the big cheese

一个重要或有影响力的人
Meaning
an important or influential person
Example
He's **the big cheese** in the company.
他是公司里的**重要人物**。
idiom

throw shade

微妙地侮辱或批评某人
Meaning
to subtly insult or criticize someone
Example
She was **throwing shade** at her ex during the conversation.
她在谈话中 **抛阴影** 给她的前男友。
idiom

to put one's finger on

精确识别或认出某物
Meaning
to identify or recognize something with precision
Example
The journalist was able to **put her finger on** the exact cause of the political unrest.
记者能够**指出**政治动荡的确切原因。
idiom

hold all the cards

处于强势地位来控制或影响局势
Meaning
to be in a strong position to control or influence a situation
Example
In the negotiations, the buyer **held all the cards**.
在谈判中，买家**掌控了所有牌**。
idiom

a ticking time bomb

一个随时可能变得危险的情况或人。
Meaning
A situation or person that could become dangerous at any moment.
Example
His anger issues make him **a ticking time bomb**.
他的愤怒问题让他成为一颗定时炸弹。
idiom

fall head over heels for someone

深深地爱上某人
Meaning
to fall deeply in love with someone
Example
He **fell head over heels for her** the moment they met.
他一见到她就**为她倾心**了。
idiom

data is the new oil

信息已成为现代世界中宝贵的资源
Meaning
information has become a valuable resource in the modern world
Example
Every company knows that **data is the new oil**.
每家公司都知道数据是新的石油。
idiom

by leaps and bounds

快速进展或改善
Meaning
to progress or improve very quickly
Example
Her English has improved **by leaps and bounds**.
她的英语进步**非常快**。
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

Throw money at something

试图通过花很多钱来解决问题，而不是寻找更好的解决办法。
Meaning
To try to solve a problem by spending a lot of money instead of using a better solution.
Example
The government keeps **throwing money at** the education problem instead of reforming it.
政府一直在**往教育问题上砸钱**，而不是去改革它。
idiom

busy bee

一个总是忙碌且活跃的人
Meaning
a person who is always busy and active
Example
She’s a **busy bee**, always working on something.
她是一个**忙碌的蜜蜂**，总是在忙碌着做事。
idiom

get to the root of the problem

发现问题的根本原因
Meaning
to discover the main cause of a problem
Example
We need to **get to the root of the problem** before we can fix it.
我们需要在解决问题之前**找到问题的根本原因**。
idiom

over the hill

过了巅峰期；不再年轻或处于最佳状态
Meaning
past one's prime; no longer young or at peak performance
Example
Some people think turning forty means you’re **over the hill**, but that’s not true.
有些人认为四十岁意味着你已经**过气了**，但事实并非如此。
idiom

Know your stuff

对某事有知识或技能
Meaning
to be knowledgeable or skilled about something
Example
You can tell she really **knows her stuff** about physics.
你可以说她对物理学真的很了解。
idiom

be on the same page

与某人达成一致或有相同的理解
Meaning
to agree with someone or have the same understanding
Example
Before getting married, they made sure they were **on the same page** about their future.
在结婚之前，他们确保他们在关于未来的事情上**达成一致**。