backpropagation
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idiom

backpropagation

一种用于神经网络的学习算法，通过调整网络中的权重来最小化错误
Meaning
a learning algorithm used in neural networks to minimize error by adjusting weights through the network
Example
The **backpropagation** algorithm helps in optimizing the neural network's performance.
反向传播算法有助于优化神经网络的性能。
idiom

bottle up your feelings

隐藏或压抑你的情感
Meaning
to hide or suppress your emotions
Example
Don't **bottle up your feelings**; talk about them.
不要**压抑你的情感**；谈论它们。
idiom

burn rubber

开得非常快
Meaning
to drive very fast
Example
They **burned rubber** as they raced to the hospital.
他们飞快地驶向医院。
idiom

bail someone out

帮助某人摆脱困境
Meaning
to help someone out of a difficult situation
Example
His friend **bailed him out** when he ran out of money.
他的朋友在他没钱时**救了他**。
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

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

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

bear with

对某人或某事保持耐心
Meaning
to be patient with someone or something
Example
Please **bear with** us while we resolve the issue.
请在我们解决问题时耐心等待。
idiom

breach of trust

未能保持信息或承诺的安全
Meaning
a failure to keep information or promises secure
Example
Leaking user data is a major **breach of trust**.
泄露用户数据是一个严重的**信任破裂**。
idiom

burn your fingers

因不好的决定或错误而遭受痛苦
Meaning
to suffer because of a bad decision or mistake
Example
He **burned his fingers** by trusting the wrong person.
他因为信错了人，**烧了自己的手指**。
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

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

bring the curtain down

结束某事；完成一场表演或活动
Meaning
to end something; to finish a performance or event
Example
The concert **brought the curtain down** on the music festival.
音乐会**为音乐节画上了句号**。
idiom

be accountable for

对某事负责并能够解释它
Meaning
to be responsible for something and able to explain it
Example
As the team leader, he is **accountable for the project's outcome**.
作为团队领导，他对**项目的结果负责**。
idiom

backdoor

一种未记录的访问系统或软件的方式，通常由黑客用来绕过安全防护。
Meaning
An undocumented way of accessing a system or software, usually used by hackers to bypass security.
Example
The attacker installed a **backdoor** to access the system at any time without being detected.
攻击者安装了一个**后门**，以便在任何时候都能访问系统，而不被发现。
idiom

bring up a family

抚养和照顾孩子
Meaning
to raise and take care of children
Example
They worked hard to **bring up a family**.
他们努力工作以抚养一个家庭。
idiom

bold as brass

非常自信，完全不害羞
Meaning
to be very confident and not shy at all
Example
She walked into the meeting **bold as brass**.
她毫不羞怯地走进了会议。
idiom

Blue skies thinking

无边界的创造性或开放性思维。
Meaning
Creative or open-minded thinking without limits.
Example
Our brainstorming session encouraged **blue skies thinking**.
我们的头脑风暴会议鼓励了无边界的思维。
idiom

bite the dust

失败或被打败
Meaning
to fail or be defeated
Example
Several small startups **bit the dust** last year.
去年有几家小型初创公司**失败了**。
idiom

break new ground

做一些创新或开创性的事情
Meaning
to do something innovative or pioneering
Example
Their research **broke new ground** in medical science.
他们的研究在医学科学上开辟了新天地。
idiom

blank mind

无法清晰思考或记起某事
Meaning
unable to think clearly or remember something
Example
During the exam, my **mind went blank**.
考试时，我的**脑子一片空白**。
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

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

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

break a promise

违背承诺
Meaning
to fail to do what one promised
Example
She **broke her promise** and didn’t call him.
她违背了承诺，没有给他打电话。
idiom

black sheep

被认为是团体或家庭耻辱的人
Meaning
a person who is considered a disgrace to a group or family
Example
He is the **black sheep** of the family.
他是家里的**黑羊**。
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

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

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

beyond one’s comprehension

太难以理解
Meaning
too difficult to understand
Example
Quantum physics is **beyond my comprehension**.
量子物理学**超出了我的理解范围**。
idiom

blue chip

一个历史悠久且财务稳健的公司
Meaning
a well-established and financially sound company
Example
He prefers to invest in **blue chip** stocks for stability.
他更喜欢投资**蓝筹**股票以获得稳定性。
idiom

bring down

让某人感到难过或减少某物
Meaning
to make someone feel sad or to reduce something
Example
Don’t let one rude comment **bring down** your confidence.
不要让一个粗鲁的评论 **降低** 你的自信。
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

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

build one's confidence

增加自信或相信自己的能力
Meaning
to increase one's self-assurance or belief in one's abilities
Example
Public speaking classes helped him **build his confidence**.
公共演讲课程帮助他**建立了自信**。
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

buckle down

开始认真工作
Meaning
to start working seriously
Example
If you want to pass the exam, you’d better **buckle down** and study.
如果你想通过考试，你最好**buckle down**并开始学习。
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

bank on

依赖于或依靠某事发生
Meaning
to rely on or depend on something happening
Example
You can **bank on** her support during tough times.
你可以在困难时刻依赖她的支持。
idiom

blow out of the water

完全惊讶或击败
Meaning
to surprise or defeat completely
Example
Their performance **blew us out of the water**.
他们的表现**完全让我们吃惊**。
idiom

be a good sport

在困难的情况下保持公平和积极
Meaning
to be fair and positive in difficult situations
Example
Even when she lost the game, she was **a good sport** and congratulated the winner.
即使她输了比赛，她还是一个好运动员，祝贺了获胜者。
idiom

behind someone’s back

在他们不知道的情况下做某事
Meaning
to do something secretly without their knowledge
Example
She was talking about me **behind my back**.
她在**我背后**说我的坏话。
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

between a rock and a hard place

面临两个困难的选择
Meaning
facing two difficult choices
Example
She’s **between a rock and a hard place** — neither option is good.
她处于两难境地——没有哪个选项是好的。
idiom

Breaking news

新鲜且重要的信息正在立即报道
Meaning
New and important information being reported immediately
Example
We have **breaking news** about the election results.
我们有关于选举结果的**突发新闻**。
idiom

blast off

以极大的能量或热情开始
Meaning
to take off or start with great energy or enthusiasm
Example
The project is ready to **blast off** next week.
该项目准备在下周启动。
idiom

break the silence

在一段沉默之后开始说话
Meaning
to start talking after a period of silence
Example
He was the one to **break the silence** after the awkward pause.
尴尬的沉默之后，他是那个**打破沉默**的人。
idiom

byte the bullet

勇敢地面对困难的情况
Meaning
to face a difficult situation bravely
Example
We have to **byte the bullet** and fix the system bugs now.
我们必须勇敢地面对并修复系统的漏洞。
idiom

bag of bones

一个非常瘦的人
Meaning
a very thin person
Example
After his illness, he turned into a **bag of bones**.
生病后，他变成了一个瘦骨如柴的人。
idiom

Batten down the hatches

为困难或危险的情况做好准备。
Meaning
To prepare for a difficult or dangerous situation.
Example
We’d better **batten down the hatches**; a storm is coming.
我们最好做好准备；风暴来了。
idiom

Bring peace to

在某种情况下恢复平静或安宁。
Meaning
To restore calm or tranquility in a situation.
Example
Her kind words helped **bring peace to** the argument.
她的好话帮助**带来了平和**的争论。
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

burning desire

强烈的实现某事的动力
Meaning
a strong motivation to achieve something
Example
He has a **burning desire** to succeed in life.
他有一个**强烈的愿望**在生活中取得成功。
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

Be all ears

非常专心地听。
Meaning
To listen very attentively.
Example
I’m **all ears**, tell me what happened!
我**全神贯注**，告诉我发生了什么!
idiom

black and white

明确界定；没有混淆或模糊
Meaning
clearly defined; without confusion or ambiguity
Example
The contract terms are **black and white**.
合同条款非常清晰。
idiom

bounce rate

在只查看一个页面后离开网站的访客百分比
Meaning
the percentage of visitors who leave a website after viewing only one page
Example
We need to lower our **bounce rate** to keep visitors engaged.
我们需要降低我们的 **跳出率** 以保持访客的参与。
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

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

beyond your wildest dreams

比你想象的更好或更惊人
Meaning
better or more amazing than imagined
Example
Her success was **beyond her wildest dreams**.
她的成功超出了她最疯狂的梦想。
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

bust someone

逮捕或抓住某人做非法的事情
Meaning
to arrest or catch someone doing something illegal
Example
The officer was able to **bust someone** for selling drugs.
警察成功地逮捕了一个卖毒品的人。
idiom

bend the truth

稍微改变事实，使某事听起来更好
Meaning
to slightly change the truth to make something sound better
Example
He tends to **bend the truth** when telling stories.
他在讲故事时常常**bend the truth**。
idiom

birds of a feather flock together

有相似兴趣或性格的人往往会成为朋友。
Meaning
People who have similar interests or personalities tend to be friends.
Example
John and Mike are always together; well, **birds of a feather flock together**.
约翰和迈克总是在一起；俗话说，物以类聚，人以群分。
idiom

black sheep of the family

一个被认为是家庭耻辱的家庭成员
Meaning
a family member who is considered a disgrace
Example
He became the **black sheep of the family** after his bad decisions.
他在做出错误决策后，成了家族中的**black sheep of the family**。
idiom

bootstrapping

在没有外部资金的情况下建立业务
Meaning
building a business without external funding
Example
He started his company through **bootstrapping**, using only his savings.
他通过**bootstrapping**创办了自己的公司，只使用了自己的储蓄。
idiom

burning with envy

感到强烈的嫉妒
Meaning
feeling intense jealousy
Example
She was **burning with envy** when she heard about his promotion.
当她听说他的晋升时，她感到非常嫉妒。
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

beam me up

快速离开一个地方或逃避一个令人不愉快的情境
Meaning
to leave a place quickly or escape an unpleasant situation
Example
This meeting is so boring—someone please **beam me up**!
这个会议太无聊了—有人请**beam me up**!
idiom

bull market

股票价格上涨的时期
Meaning
a period when prices of stocks are rising
Example
Investors are optimistic during a **bull market**.
投资者在**牛市**期间持乐观态度。
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

black hat

一个具有恶意意图的黑客
Meaning
a hacker with malicious intent
Example
**Black hats** often exploit vulnerabilities for personal gain.
**Black hats** 常常利用漏洞来谋取个人利益。
idiom

brave the storm

勇敢地面对巨大的困难
Meaning
to face great difficulties with courage
Example
They **braved the storm** to rescue the stranded people.
他们**勇敢地面对风暴**去营救被困的人。
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

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 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

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

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

burst with energy

充满活力和热情
Meaning
to have a lot of energy and enthusiasm
Example
The children were **bursting with energy** during the game.
孩子们在游戏中充满活力。
idiom

buckle under pressure

因过度压力或压力而屈服或失败。
Meaning
to give in or fail due to too much stress or pressure
Example
Some employees **buckle under pressure**, while others thrive.
一些员工在压力下屈服，而其他员工则茁壮成长。
idiom

blind date

两个从未见过面的人之间的浪漫约会
Meaning
a romantic meeting between two people who have never met before
Example
She met her boyfriend on a **blind date**.
她是在一次相亲中遇到她的男朋友的。
idiom

battle-tested

通过经验或困难证明有效
Meaning
proven effective through experience or hardship
Example
She’s a **battle-tested** leader who knows how to stay calm under pressure.
她是一位有经验的领导者，知道如何在压力下保持冷静。
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

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

burn a hole in one's pocket

很快或不负责任地花钱
Meaning
to spend money quickly or irresponsibly
Example
After receiving his bonus, he couldn't resist and **burned a hole in his pocket** by buying a new car.
收到奖金后，他忍不住买了一辆新车，把钱都花光了。
idiom

brain like a computer

拥有极其分析性和高效的思维
Meaning
to have an extremely analytical and efficient mind
Example
She remembers every detail; she has a **brain like a computer**.
她记得每个细节；她有一个**像计算机一样的大脑**。
idiom

back up

支持或备份重要数据
Meaning
to support or to make a copy of important data
Example
Can you **back up** my explanation during the meeting?
你能在会议期间支持我的解释吗？
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

block out

忽略干扰或不愉快的想法
Meaning
to ignore distractions or unpleasant thoughts
Example
She tried to **block out** the noise and continue working.
她试图**阻挡**噪音并继续工作。
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

be comfortable in your own skin

对自己是谁感到自信和幸福
Meaning
to be confident and happy with who you are
Example
It took years for her to **be comfortable in her own skin**.
她花了好几年才能在自己的皮肤中感到舒适。
idiom

be there for someone

在需要时支持或帮助某人
Meaning
to support or help someone when they need it
Example
True friends **are there for you** when you need them.
真正的朋友会在你需要时为你提供帮助
idiom

Bailout package

为了防止公司或经济崩溃而提供的财务支持。
Meaning
Financial support given to prevent a company or economy from collapsing.
Example
The government announced a **bailout package** for struggling airlines.
政府为陷入困境的航空公司宣布了**bailout package**。
idiom

back and forth

反复改变意见或决策
Meaning
to change opinions or decisions repeatedly
Example
We’ve been going **back and forth** about this issue for weeks.
我们已经就这个问题讨论了几个星期。
idiom

Born with a silver spoon in one's mouth

出生在富裕家庭。
Meaning
To be born into a wealthy family.
Example
He never had to struggle; he was **born with a silver spoon in his mouth**.
他从未需要奋斗；他出生在富裕家庭。
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

break the ice

在尴尬的情况下开始友好的对话
Meaning
to start a friendly conversation in an awkward situation
Example
To **break the ice**, I told a funny story.
为了**打破僵局**，我讲了一个有趣的故事。
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

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

bring luck

带来好运
Meaning
to cause good fortune
Example
This bracelet is said to **bring luck** to whoever wears it.
有人说，这只手链会带来好运给佩戴它的人。
idiom

burn the candle at both ends

工作过度而没有足够的休息
Meaning
to work too hard without enough rest
Example
If you **burn the candle at both ends**, you’ll get exhausted soon.
如果你**两头烧蜡烛**，你很快会感到精疲力尽。
idiom

Big fish in a small pond

在一个小的组织或区域中是一个重要的人。
Meaning
An important person in a small organization or area.
Example
He prefers being a **big fish in a small pond** rather than competing globally.
他宁愿在一个小池塘里做一条大鱼，也不想在全球范围内竞争。
idiom

burn your boats

承诺采取行动而没有退路
Meaning
to commit yourself to a course of action without a way back
Example
He **burned his boats** when he quit his job to start a business.
当他辞去工作并开始创业时，他**烧掉了自己的船**。
idiom

build from the ground up

从头开始做某事
Meaning
to start something from the very beginning
Example
They **built their business from the ground up** with no investors.
他们**从头开始建立了他们的生意**，没有投资者。
idiom

blow someone's cover

揭露某人的秘密身份或隐藏目的
Meaning
to reveal someone's secret identity or hidden purpose
Example
The journalist accidentally **blew the cover** of the undercover agent.
记者不小心揭露了卧底特工的身份。
idiom

brick by brick

逐步而稳定地实现某事
Meaning
to achieve something gradually and steadily
Example
He built his business **brick by brick**.
他一点一点地建立了自己的事业。
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

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

be sure of yourself

对你的能力或意见有信心
Meaning
to have confidence in your abilities or opinions
Example
To be a leader, you must **be sure of yourself**.
成为一名领导者，你必须对自己有信心。
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 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**。
idiom

burning the midnight oil

熬夜工作
Meaning
working late into the night
Example
She’s been **burning the midnight oil** to finish the report.
她为了完成报告，一直在熬夜工作。
idiom

brand ambassador

通过个人影响力推广品牌的人
Meaning
a person who promotes a brand through personal influence
Example
They hired a celebrity as their **brand ambassador**.
他们聘请了一位名人作为他们的**品牌大使**。
idiom

butterflies in my 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

bite your tongue

强忍不说出自己想说的话
Meaning
to stop yourself from saying something you want to say
Example
I had to **bite my tongue** when my boss took credit for my work.
当老板抢走我的功劳时，我不得不忍住不说话。
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

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

Break the news

告诉某人重要或坏消息。
Meaning
To tell someone important or bad news.
Example
He didn’t know how to **break the news** to his parents.
他不知道如何将**这个消息传达**给他的父母。
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

Be as good as your word

Zuò nǐ suǒ chéngnuò de shì.
Meaning
To do what you promised to do.
Example
He said he’d help and he’s **as good as his word**.
Tā shuō tā huì bāngzhù, ér tā **rú tā de huà yīyàng hǎo**.
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。