under the knife
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idiom

under the knife

动手术
Meaning
to have surgery
Example
She has to go **under the knife** for her knee problem.
她因为膝盖问题必须动手术。
idiom

under the radar

未被注意或未被发现
Meaning
unnoticed or undetected
Example
He stayed **under the radar** during the investigation.
他在调查期间保持低调。
idiom

upload your brain

将一个人的思想、知识或意识以数字方式转移或存储
Meaning
to transfer or store one’s thoughts, knowledge, or consciousness digitally
Example
One day we might be able to **upload our brain** into the cloud.
有一天我们可能能够将我们的脑袋**上传到云端**
idiom

under the table

秘密地或不诚实地完成，通常涉及金钱
Meaning
done secretly or dishonestly, often involving money
Example
He was paid **under the table** to avoid taxes.
他为了逃税而**秘密收款**。
idiom

under the hood

表面之下; 基本机制或系统
Meaning
behind the surface; the underlying mechanism or system
Example
Developers love to see what’s **under the hood** of a new app.
开发人员喜欢看到新应用的**引擎盖下**是什么。
idiom

under pressure

处于充满压力的环境中，面临很多要求
Meaning
to be in a stressful situation with a lot of demands
Example
She performs well even when she’s **under pressure**.
即使她在**压力下**，仍然表现出色。
idiom

under the pump

处于巨大的压力或压力之下
Meaning
to be under a lot of pressure or stress
Example
The team has been **under the pump** to meet the project deadline.
团队一直在 **巨大压力下**，以赶上项目的截止日期。
idiom

upload your thoughts

在网上表达或分享自己的想法
Meaning
to express or share one’s ideas online
Example
People love to **upload their thoughts** on social media.
人们喜欢在社交媒体上上传自己的想法。
idiom

under someone's nose

在一个明显的地方或情况下，某人应该注意到
Meaning
in an obvious place or situation where someone should have noticed
Example
The keys were **under my nose** the whole time on the kitchen table.
钥匙一直都在厨房桌子上，**就在我的鼻子底下**。
idiom

Unicorn company

一家估值超过十亿美元的初创公司。
Meaning
A startup valued at over one billion dollars.
Example
Becoming a **unicorn company** is every founder’s dream.
成为一家**独角兽公司**是每个创始人的梦想。
idiom

up against the wall

身处非常困难或绝望的境地
Meaning
to be in a very difficult or desperate situation
Example
The company is **up against the wall** financially after the recent losses.
该公司在最近的损失后，财务上**走投无路**。
idiom

under investigation

因涉嫌不当行为，正在由当局进行调查或审查
Meaning
being examined or looked into by authorities for possible wrongdoing
Example
The suspect is currently **under investigation** for his involvement in the crime.
嫌疑人目前因涉嫌参与犯罪而接受调查。
idiom

upgrade your thinking

改善你的思维过程或心态
Meaning
to improve your thought process or mindset
Example
To adapt to AI trends, you must **upgrade your thinking**.
为了适应人工智能趋势，你必须升级你的思维。
idiom

under construction

正在开发或建设中
Meaning
in the process of being developed or built
Example
Our new website is still **under construction**.
我们的网站仍在建设中。
idiom

under oath

在法庭上发誓说真话
Meaning
having sworn to tell the truth in court
Example
He lied **under oath** and was charged with perjury.
他在 **宣誓** 后撒谎，并被控伪证罪。
idiom

under the stars

在露天，特别是在夜晚
Meaning
in the open air, outside, especially at night
Example
We slept **under the stars** by the lake.
我们在湖边**在星空下**睡觉。
idiom

user journey

用户与品牌或产品的完整体验
Meaning
the complete experience a user has with a brand or product
Example
Mapping the **user journey** helps improve customer satisfaction.
绘制**user journey**有助于提高客户满意度。
B2 idiom

up in the air

不确定或未决定
Meaning
Uncertain or undecided
Example
The plans for the project are still up in the air.
这个项目的计划仍悬而未决。
idiom

use up

完全消耗某物
Meaning
to consume something completely
Example
We’ve **used up** all the printer paper already.
我们已经用完了所有的打印纸。
idiom

united we stand, divided we fall

人们在一起工作时更强大
Meaning
people are stronger when they work together
Example
Remember, **united we stand, divided we fall**.
记住，团结我们屹立，分裂我们倒下。
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

under someone's thumb

完全在某人控制之下
Meaning
completely under someone's control
Example
He's **under his boss's thumb** and can't make his own decisions.
他**在老板的控制下**，不能做出自己的决定。
idiom

under false pretenses

通过撒谎或误导别人
Meaning
by lying or misleading someone
Example
He got the job **under false pretenses**.
他是通过虚假的借口得到这份工作的。
idiom

Under the spotlight

接受公众注意或审查。
Meaning
Receiving public attention or scrutiny.
Example
The editor has been **under the spotlight** after the controversial article.
编辑在有争议的文章之后**成为焦点**。
idiom

under a cloud

被怀疑或遇到麻烦
Meaning
being suspected or in trouble
Example
He left the company **under a cloud** after the scandal.
在丑闻之后，他离开了公司 **under a cloud**。
idiom

under the gun

在压力下完成或做某事
Meaning
under pressure to perform or complete something
Example
We were **under the gun** to meet the deadline for the report.
我们为了赶报告的截止日期而承受压力。
idiom

under the microscope

被非常仔细地检查
Meaning
being examined very closely
Example
The new policy is **under the microscope** by analysts.
新政策正被分析师**在显微镜下**审查。
idiom

under the weather

感觉不舒服或生病
Meaning
feeling ill or unwell
Example
I didn’t go to work because I felt **under the weather**.
我没去工作，因为我感觉不舒服。
idiom

upgrade your mindset

让自己的思维方式适应现代的变化或创新
Meaning
to adapt one’s thinking for modern changes or innovation
Example
In the age of AI, it’s vital to **upgrade your mindset**.
在人工智能时代，**升级你的思维方式**非常重要。