back out of
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idiom

back out of

从协议或承诺中撤退
Meaning
to withdraw from an agreement or commitment
Example
He **backed out of** the trip at the last minute.
他在最后一刻**退出了**这次旅行。
idiom

back away from

从某个情境中撤退或退出
Meaning
to retreat or withdraw from a situation
Example
He chose to **back away from** the argument before it escalated.
他选择在争论升级之前**退出**。
idiom

bounce back

在挫折或失败后迅速恢复
Meaning
to recover quickly after a setback or failure
Example
She **bounced back** after losing the competition.
她在输掉比赛后迅速恢复了过来。
idiom

be a role model

成为别人应该模仿的榜样
Meaning
to be an example that others should imitate
Example
She is always a **role model** for younger employees in the company.
她总是公司里年轻员工的**榜样**。
idiom

breakthrough

一个重大的或突如其来的发展或发现；一个重要的成就
Meaning
a significant or sudden development or discovery; an important achievement
Example
The scientist made a major **breakthrough** in his research on cancer treatment.
科学家在癌症治疗研究中取得了一个重大的**bùruì kè sū**。
idiom

burst out laughing

突然大笑
Meaning
to suddenly start laughing loudly
Example
Everyone **burst out laughing** at his joke.
每个人听了他的笑话都**爆笑起来**。
idiom

buy a lemon

买到有缺陷或无价值的东西
Meaning
to buy something that is defective or worthless
Example
He **bought a lemon** when he got that used car.
当他买到那辆二手车时，他**买了一个柠檬**。
idiom

back out

退出协议或承诺
Meaning
to withdraw from an agreement or commitment
Example
They can’t **back out** after signing the contract.
他们在签署合同后不能退出。
idiom

be like family

像家庭成员一样亲近
Meaning
to be as close as family members
Example
My best friend is **like family** to me.
我最好的朋友对我来说**就像家人**。
idiom

Burning question

一个重要或紧急的问题，人们急于知道。
Meaning
An important or urgent question that people are eager to know.
Example
The **burning question** is whether the plan will actually work.
最关键的问题是这个计划是否真的有效。
idiom

be a person of your word

成为一个遵守承诺的人
Meaning
to be someone who keeps their promises
Example
She is truly **a person of her word**, always doing what she says.
她真的是一个信守承诺的人，总是做她说的事情。
idiom

bright spark

一个非常聪明或有才华的人
Meaning
a very clever or talented person
Example
The new intern is a real **bright spark** with great ideas.
新的实习生是一个真正的**bright spark**，拥有很棒的想法。
idiom

break the deadlock

打破僵局或脱离无法进展的局面
Meaning
to end a situation in which progress is not possible
Example
They finally managed to **break the deadlock** through discussion.
他们最终通过讨论打破了僵局。
idiom

balance of power

各国之间的权力分配，以防止任何一个国家变得过于强大
Meaning
the distribution of power between nations to prevent any one nation from becoming too powerful
Example
The United Nations aims to maintain the **balance of power** among its member states.
联合国旨在维持其成员国之间的**力量平衡**。
idiom

boil over

当愤怒变得无法控制时
Meaning
when anger becomes too much to control
Example
The argument finally **boiled over** into a shouting match.
争论最终爆发成了一场大喊大叫的争执。
idiom

bravery in the face of danger

在面对危险时表现出勇气
Meaning
showing courage even when facing danger
Example
The firefighter showed **bravery in the face of danger**.
消防员在面对危险时表现出了勇气。
idiom

born in the purple

出生于富裕或皇室家庭
Meaning
born into a wealthy or royal family
Example
He was **born in the purple**, so wealth was never an issue.
他出生于皇室家庭，因此财富从未是问题。
idiom

back to square one

重新开始
Meaning
to start over again
Example
After the computer crashed, I had to go **back to square one** with my report.
电脑崩溃后，我不得不重新开始我的报告。
idiom

beat down

重复用力打击，例如强烈的阳光或雨水
Meaning
to strike repeatedly with force, such as intense sun or rain
Example
The afternoon sun **beat down** on the field all day.
下午的阳光 **照射** 在田野上整整一天。
idiom

breeze through

轻松地做某事，几乎不费力气
Meaning
to do something easily and with little effort
Example
She managed to **breeze through** the exam without any problems.
她轻松地通过了考试，没有遇到任何问题。
idiom

beat the algorithm

找到一种方法来智取或绕过系统的逻辑
Meaning
to find a way to outsmart or bypass a system's logic
Example
Marketers always try to **beat the algorithm** for better reach.
营销人员总是尝试**击败算法**以获得更好的覆盖范围。
idiom

blackout

暂时失去意识
Meaning
to lose consciousness temporarily
Example
He suddenly **blacked out** during the match.
他在比赛中突然**晕倒**。
idiom

build bridges

改善人与人之间的关系
Meaning
to improve relationships between people
Example
We need to **build bridges** between our two departments.
我们需要在两个部门之间**建立联系**。
idiom

beat the clock

在截止日期前完成某事
Meaning
to finish something before the deadline
Example
We managed to **beat the clock** and submit the report early.
我们成功地**赶在最后期限前**提交了报告。
idiom

Best foot forward

努力给人留下最好的印象
Meaning
To try to make the best possible impression
Example
She always puts her **best foot forward** on important occasions.
她总是在重要场合尽力表现自己最好的一面。
idiom

burn out

由于过度工作而变得非常疲劳并失去动力
Meaning
to become very tired and lose motivation due to overwork
Example
If you don’t rest, you’ll **burn out** soon.
如果你不休息，你很快就会**精疲力尽**。
idiom

bosom friends

非常亲密和亲切的朋友
Meaning
very close and intimate friends
Example
They have been **bosom friends** since childhood.
他们从小就是非常亲密的朋友。
idiom

bark up the wrong tree

做出错误的假设
Meaning
to make a wrong assumption
Example
If you think I took your wallet, you’re **barking up the wrong tree**.
如果你认为我拿了你的钱包，你**做出了错误的假设**。
idiom

bounce back from

在挫折后迅速恢复
Meaning
to recover quickly after a setback
Example
The team needs to **bounce back from** last week's loss.
队伍需要从上周的失利中迅速恢复。
idiom

brush past

轻轻接触并迅速经过某人或某物
Meaning
to move quickly by someone or something with slight contact
Example
He **brushed past** the reporters without stopping.
他**轻轻地擦过**记者们没有停下来。
idiom

be at someone’s beck and call

随时准备帮助或服从某人
Meaning
to always be ready to help or obey someone
Example
The assistant is **at his boss’s beck and call**.
助理始终在老板的召唤下。
idiom

bury your head in the sand

忽略问题，指望它自己解决
Meaning
to ignore a problem hoping it will go away
Example
We can’t **bury our heads in the sand** about climate change any longer.
我们不能再对气候变化**把头埋在沙里**了
idiom

beyond the pale

超出可接受的规则或标准
Meaning
outside acceptable rules or standards
Example
His behavior was **beyond the pale**.
他的行为超出了可接受的范围。
idiom

break out in a cold sweat

因恐惧或焦虑而突然开始流汗
Meaning
to suddenly start sweating due to fear or anxiety
Example
He **broke out in a cold sweat** before his job interview.
他在面试前因害怕而出了一身冷汗。
idiom

believe you’re good enough

接受你是有能力和值得的人
Meaning
to accept that you are capable and worthy
Example
To overcome fear, you must **believe you’re good enough**.
要克服恐惧，你必须相信自己足够好。
idiom

burned out

因过度工作而完全疲惫
Meaning
completely exhausted or tired due to overwork
Example
After months of overtime, she felt **burned out**.
经过几个月的加班后，她感到筋疲力尽。
idiom

burst into tears

突然开始哭泣
Meaning
to suddenly start crying
Example
She **burst into tears** after hearing the bad news.
她听到坏消息后**突然哭了起来**。
idiom

branch out

扩展到新的活动或领域
Meaning
to expand into new activities or areas
Example
The bakery plans to **branch out** into catering services next year.
面包店计划明年扩展到餐饮服务。
idiom

birds of a feather

有相似兴趣或特征的人
Meaning
people with similar interests or characteristics
Example
Tom and Jerry are always together—**birds of a feather**.
汤姆和杰瑞总是在一起——他们是志同道合的朋友。
idiom

bargain chip

在谈判中用于获得更好交易的有价值的东西
Meaning
something of value used in negotiations to get a better deal
Example
His offer of a longer contract was a strong **bargain chip**.
他提出的更长期合同是一个强有力的 **bargain chip**。
idiom

blow away the cobwebs

在不活跃后让身心焕然一新
Meaning
to refresh one’s mind or body after inactivity
Example
A short walk helped me **blow away the cobwebs**.
一次短暂的散步帮助我**焕然一新**。
idiom

be your own biggest fan

欣赏并相信自己
Meaning
to appreciate and believe in yourself
Example
You should **be your own biggest fan** to stay motivated.
你应该成为自己最大的粉丝，以保持动力。
idiom

busy as a bee

非常活跃或勤奋
Meaning
very active or hardworking
Example
She’s **as busy as a bee** preparing for the wedding.
她正在为婚礼**像蜜蜂一样忙碌**。
idiom

bring to the table

贡献一些有用或有价值的东西
Meaning
to contribute something useful or valuable
Example
Each team member **brings something unique to the table**.
每个团队成员**带来一些独特的东西**。
idiom

bottom line

最重要的点；最终结果或利润
Meaning
the most important point; the final result or profit
Example
The **bottom line** is that trade deficits are increasing.
关键是贸易逆差正在增加。
idiom

block off

封锁一个区域，使人们无法进入
Meaning
to close an area so people cannot enter
Example
Police **blocked off** the street after the accident.
警方在事故后封锁了街道。
idiom

ballpark figure

一个近似的估算或数字
Meaning
an approximate estimate or number
Example
Can you give me a **ballpark figure** for the project cost?
你能给我一个项目成本的**近似估算**吗？
idiom

behind enemy lines

处于敌对或危险的情况中
Meaning
in a hostile or dangerous situation
Example
Journalists were working **behind enemy lines** to report the truth.
记者们在敌人的防线后工作，以报道真相。
idiom

beyond the scope

超出计划或预期的重点范围
Meaning
outside the planned or expected area of focus
Example
The new feature was beyond the scope of the original project but added great value.
新功能超出了原项目的范围，但增加了很大的价值。
idiom

back on track

返回正确的路径或计划
Meaning
to return to the right path or plan
Example
After some delays, our trip is **back on track**.
经过一些延迟后，我们的旅行已**恢复正常**。
idiom

bite the byte

应对困难的技术挑战
Meaning
to deal with a difficult technological challenge
Example
Developers had to **bite the byte** to fix the software issue.
开发人员必须 **bite the byte** 来修复软件问题。
idiom

back to the drawing board

在失败后重新开始
Meaning
to start over again after a failure
Example
Our proposal was rejected, so it's **back to the drawing board**.
我们的提案被拒绝了，所以我们必须**重新开始**。
idiom

big data

极大的数据集，可以通过计算分析来揭示模式、趋势和关联。
Meaning
Extremely large data sets that may be analyzed computationally to reveal patterns, trends, and associations.
Example
The company uses **big data** to improve customer experience.
公司使用**大数据**来提升客户体验。
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

blow off steam

表达愤怒或沮丧以使自己感觉更好
Meaning
to express anger or frustration so that you feel better
Example
He went for a run to **blow off steam** after the argument.
他在争论后去跑步以发泄情绪。
idiom

behind the times

过时或未跟上现代思想
Meaning
old-fashioned or not keeping up with modern ideas
Example
My uncle still uses a typewriter—he’s **behind the times**.
我的叔叔仍然使用打字机——他 **跟不上时代**。
idiom

backroom deal

由有权势的人达成的秘密协议
Meaning
a secret agreement made by powerful people
Example
The media exposed the **backroom deal** between the two parties.
媒体揭露了两方之间的**秘密协议**。
idiom

bang for your buck

花费的每一分钱的价值；一个好交易
Meaning
value for the money spent; a good deal
Example
This insurance plan gives you the best **bang for your buck**.
这个保险计划给你最划算的选择。
idiom

breathe in

深呼吸
Meaning
to inhale air deeply
Example
Take a moment to **breathe in** before you speak.
在说话之前，花一刻钟深呼吸。
idiom

build from scratch

从头开始做某事
Meaning
to start something from the very beginning
Example
They **built the company from scratch** with no outside funding.
他们从零开始建立公司，没有外部资金。
idiom

beat the rap

逃避惩罚或避免被定罪
Meaning
to escape punishment or avoid being convicted
Example
He managed to **beat the rap** thanks to a clever lawyer.
他凭借一个聪明的律师成功逃避了惩罚。
idiom

break the bank

花费太多钱；把所有的钱都用光
Meaning
to cost too much; to use up all your money
Example
Buying that car will **break the bank**.
买那辆车会让你**倾家荡产**。
idiom

brainstorm ideas

思考新的和创造性的想法
Meaning
to think of new and creative ideas
Example
The class gathered to **brainstorm ideas** for the science project.
班级聚集在一起为科学项目生成创意。
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

be at your wits' end

担心或烦恼到不知道该怎么办
Meaning
to be so worried or upset that you don't know what to do
Example
I'm **at my wits' end** trying to calm the kids down.
我在尽力平静孩子们时已经精疲力尽。
idiom

break the internet

在网上引起大量关注和讨论
Meaning
to cause an enormous amount of attention and discussion online
Example
The celebrity's new photo **broke the internet**.
这位名人的新照片**打破了互联网**。
idiom

bond of friendship

朋友之间信任和感情的强大联系。
Meaning
A strong connection of trust and affection between friends.
Example
Their **bond of friendship** grew stronger over the years.
他们的友谊之纽随着岁月变得更加牢固。
idiom

break into a cold sweat

因恐惧或焦虑而开始出冷汗
Meaning
to start sweating due to fear or anxiety
Example
He **broke into a cold sweat** before giving his speech.
他在发表演讲前**紧张得冒出了冷汗**。
idiom

by the book

严格按照规则行事
Meaning
to follow the rules exactly
Example
Our manager does everything **by the book**.
我们的经理做一切都**按规矩**。
idiom

by trial and error

通过实验和纠正错误来学习
Meaning
learning by experimenting and correcting mistakes
Example
We developed the best method **by trial and error**.
我们通过 **试验和错误** 开发了最好的方法。
idiom

blow your top

非常生气
Meaning
to become very angry
Example
He **blew his top** when he found out about the mistake.
他在得知错误后**火冒三丈**。
idiom

blind faith

不加质疑地信任
Meaning
trusting without questioning
Example
Having **blind faith** can sometimes lead to disappointment.
拥有**盲目信任**有时会导致失望。
idiom

break away

从小组或常规中分离
Meaning
to separate from a group or routine
Example
She plans to **break away** from the commute by working remotely twice a week.
她计划通过每周远程工作两次来**break away**通勤。
idiom

break into

成功进入一个新领域或职业
Meaning
to enter a new field or profession successfully
Example
She managed to **break into** the film industry last year.
她去年成功进入了电影行业。
idiom

be on duty

在某个时间值班或负责某事
Meaning
to be working or responsible for something at a certain time
Example
The guard was **on duty** all night.
警卫整晚都在值班。
idiom

book someone

正式指控某人犯罪
Meaning
to officially charge someone with a crime
Example
The police **booked** him for theft.
警察因盗窃指控了他。
idiom

buy into

接受或支持一个想法或计划
Meaning
to accept or support an idea or plan
Example
The team quickly **bought into** the new workflow.
团队迅速**接受了**新的工作流程。
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

bottle up feelings

把情感藏在心里不表达
Meaning
to keep emotions inside without expressing them
Example
It's not healthy to **bottle up your feelings** for too long.
长时间把情感压抑在心里对身体不好。
idiom

break the clutter

在拥挤或竞争激烈的市场中脱颖而出
Meaning
to stand out in a crowded or competitive market
Example
A good tagline can help a brand **break the clutter**.
一个好的标语可以帮助品牌在混乱中脱颖而出。
idiom

blow the whistle

揭露不正当行为或揭示机密信息
Meaning
to expose wrongdoing or reveal secret information
Example
He **blew the whistle** on the company’s illegal activities.
他揭露了公司非法活动。
idiom

by and large

大体上
Meaning
generally speaking; on the whole
Example
**By and large**, we agree with your proposal.
大体上，我们同意你的提案。
idiom

brute force attack

一种通过尝试所有可能的密码组合直到找到正确密码的黑客方法
Meaning
a method of hacking that tries all possible combinations of passwords until the correct one is found
Example
The attacker launched a **brute force attack** on the system’s login page.
攻击者对系统的登录页面发起了**暴力破解攻击**。
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

bear in mind

记住或考虑某事
Meaning
to remember or consider something
Example
**Bear in mind** that traffic will be heavy at that time.
请记住，那时交通会很拥挤。
idiom

bright future ahead

拥有积极的前景或可能性
Meaning
having positive prospects or possibilities
Example
With your hard work, you have a **bright future ahead**.
通过你的努力工作，你拥有一个 **光明的未来**。
idiom

bubbling with joy

非常开心和兴奋
Meaning
very happy and excited
Example
The children were **bubbling with joy** after receiving their gifts.
孩子们在收到礼物后非常开心和兴奋。
idiom

bolt from the blue

一个突然和意想不到的事件
Meaning
a sudden and unexpected event
Example
The project cancellation came as a **bolt from the blue**.
项目的取消就像晴天霹雳一样。
idiom

breathe easy

在压力大或危险的情况下放松
Meaning
to relax after a stressful or dangerous situation
Example
After the pollution control laws were enforced, people could finally **breathe easy**.
在污染控制法案实施后，人们终于能够**松口气**。
idiom

bring to life

使某事物更有趣或更逼真
Meaning
to make something more interesting or realistic
Example
The artist’s use of color really **brought the painting to life**.
艺术家使用的颜色真的 **使画作栩栩如生**。
idiom

butterflies in one's stomach

感到紧张或焦虑
Meaning
feeling nervous or anxious
Example
I had **butterflies in my stomach** before the interview.
面试前我感到很紧张。
idiom

build brand loyalty

建立对品牌的长期信任和依赖
Meaning
to create long-term trust and attachment to a brand
Example
Consistent quality helps **build brand loyalty** among customers.
持续的质量帮助在客户中建立品牌忠诚度。
idiom

beyond reasonable doubt

没有任何逻辑上的不确定性
Meaning
without any logical uncertainty
Example
The jury found him guilty **beyond reasonable doubt**.
陪审团认定他毫无合理怀疑地有罪。
idiom

bring forward

将某物移至较早的时间
Meaning
to move something to an earlier time
Example
We had to **bring forward** the meeting due to travel.
由于旅行，我们不得不提前会议。
idiom

be all smiles

看起来非常开心和愉快
Meaning
to look very happy and cheerful
Example
She was **all smiles** after hearing the good news.
听到好消息后，她面带笑容。
idiom

behind the firewall

受到保护或与外部威胁隔离
Meaning
protected or isolated from external threats
Example
Sensitive company data should always stay **behind the firewall**.
敏感的公司数据应该始终保持在**防火墙后面**。
idiom

bail on

突然抛弃某人或某事
Meaning
to abandon someone or something suddenly
Example
He wouldn’t **bail on** his friends at the last minute.
他不会在最后一刻抛弃他的朋友。
idiom

beyond a reasonable doubt

毫无合理怀疑；完全确定
Meaning
without any logical reason to doubt; with full certainty
Example
The evidence proved his guilt **beyond a reasonable doubt**.
证据证明了他的罪行毫无合理怀疑。
idiom

battle of wills

双方都拒绝让步的冲突
Meaning
a conflict where both sides refuse to give up
Example
It became a **battle of wills** between the manager and the team leader.
它变成了经理和团队领导之间的**意志之战**。
idiom

behind closed doors

私下里; 秘密地
Meaning
in private; secretly
Example
The deal was made **behind closed doors**.
交易是在闭门造车的情况下达成的。
idiom

brush up on

提高某人的技能或知识
Meaning
to improve one’s skill or knowledge
Example
She decided to **brush up on** her painting techniques.
她决定提高她的绘画技巧。
idiom

blow hot and cold

不断改变你的态度或情绪
Meaning
to keep changing your attitude or mood
Example
He’s **blowing hot and cold** about the new project.
他对这个新项目态度不断变化。
idiom

break into a market

成功进入一个新的市场或行业
Meaning
to successfully enter a new market or industry
Example
The company is trying to **break into the Asian market**.
公司正在尝试进入亚洲市场。
idiom

brand awareness

消费者对品牌的熟悉程度
Meaning
the extent to which consumers are familiar with a brand
Example
Our main goal is to increase **brand awareness** through social media.
我们的主要目标是通过社交媒体提高**品牌意识**。
idiom

Band together

为了共同的目标而团结起来。
Meaning
To unite for a common purpose.
Example
The workers **banded together** to demand better wages.
工人们团结起来要求更高的工资。
idiom

Breaking new ground

做出重要的新发现或创新；做一些前所未做过的事情。
Meaning
To make an important new discovery or innovation; to do something that has never been done before.
Example
The new trade agreement is **breaking new ground** in international relations.
新的贸易协议在国际关系中**开创了新局面**。
idiom

blow a fuse

突然变得非常生气或失去控制
Meaning
to suddenly become very angry or lose control
Example
He **blew a fuse** when he saw the mess.
他看到那一团糟时勃然大怒。
idiom

beat oneself up

对某事过分自责
Meaning
to blame yourself too much for something
Example
Don’t **beat yourself up** over one mistake.
不要因为一个错误而**过分责备自己**。
idiom

build up your confidence

逐渐变得更加自信
Meaning
to gradually become more confident
Example
Public speaking can help you **build up your confidence**.
公众演讲可以帮助你增强信心。
idiom

bosom friend

一个非常亲密和值得信赖的朋友
Meaning
a very close and trusted friend
Example
We’ve been **bosom friends** since childhood.
我们从小就是非常要好的朋友。
idiom

break one's word

未能履行承诺
Meaning
to fail to keep a promise
Example
Don’t **break your word**; people rely on you.
不要**打破承诺**；人们依赖你。
idiom

bent over backwards

非常努力地帮助或取悦某人
Meaning
to try very hard to help or please someone
Example
She **bent over backwards** to make sure everyone was happy.
她**弯腰后仰**确保每个人都很高兴。
idiom

blow your mind

极大地打动或震撼某人
Meaning
to impress or amaze someone greatly
Example
The new AI technology will **blow your mind**.
新的人工智能技术将让你震惊。
idiom

Bear with me

请耐心等我。
Meaning
Be patient with me.
Example
**Bear with me** while I fix this problem.
**请耐心等我** 当我解决这个问题时。
idiom

burn one's bridges

摧毁无法恢复的关系或机会
Meaning
to destroy relationships or opportunities that cannot be restored
Example
He **burned his bridges** when he insulted his boss.
他在侮辱老板时**烧了自己的桥梁**
idiom

bounce around

随意讨论或在想法之间游走
Meaning
to discuss or move between ideas casually
Example
Let’s **bounce around** concepts before we pick one.
让我们在挑选之前讨论概念。
idiom

brainstorm

在小组讨论中生成许多创意想法
Meaning
to generate many creative ideas in a group discussion
Example
Let’s **brainstorm** some ideas for our next campaign.
让我们为我们的下一个活动产生一些想法。
idiom

bookworm

一个喜欢阅读的人
Meaning
a person who loves reading
Example
He’s such a **bookworm**; he spends all his free time in the library.
他真是一个书虫；他把所有的空闲时间都花在图书馆里。
idiom

break even

收入与支出相等，既无利润也无损失
Meaning
to have equal income and expenses, neither profit nor loss
Example
The company finally **broke even** after three years.
公司终于在三年后**持平**。
idiom

Break a sweat

付出努力或在某事上辛苦工作。
Meaning
To exert effort or work hard at something.
Example
She didn't even **break a sweat** while finishing the entire project in one day.
她在一天内完成整个项目时，甚至没有出一滴汗。
idiom

be thick as thieves

成为非常亲密的朋友
Meaning
to be very close friends
Example
Those two have been **thick as thieves** since childhood.
这两个人从小就是**非常亲密的朋友**。