open up to trade
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phrasal-verb

open up to trade

开始允许国际贸易或经济交换
Meaning
to start allowing international trade or economic exchange
Example
Many developing nations are trying to **open up to trade** to attract foreign investment.
许多发展中国家正在努力**开放贸易**以吸引外国投资。
idiom

on the line

处于危险中；有丢失的风险
Meaning
at risk; in danger of being lost
Example
The company’s reputation is **on the line** after the failed shipment.
在运输失败后，公司的声誉**岌岌可危**。
idiom

on solid ground

处于安全或稳定的状况
Meaning
in a safe or stable situation
Example
After months of hard work, the company is now **on solid ground**.
经过几个月的辛勤工作，公司现在处于稳定的状况。
idiom

olive branch

和平或和解的姿态
Meaning
a gesture of peace or reconciliation
Example
The president extended an **olive branch** by inviting his rival to the summit.
总统通过邀请他的对手参加峰会来伸出**橄榄枝**。
idiom

on the tip of one's tongue

当你几乎记得某事但不完全
Meaning
when you can almost remember something but not quite
Example
His name is **on the tip of my tongue**, but I can’t recall it.
他的名字就在我嘴边，但我想不起来。
phrasal-verb

opt against

决定不选择特定选项
Meaning
to decide not to choose a particular option
Example
After considering the risks, the company **opted against** the merger.
在考虑了风险之后，公司**选择反对**合并。
idiom

off the wall

不寻常或非常规
Meaning
unusual or unconventional
Example
His ideas are often **off the wall**, but they sometimes work.
他的想法常常**off the wall**，但有时会有效。
idiom

on good terms

保持友好和平的关系
Meaning
to have a friendly and peaceful relationship
Example
They are still **on good terms** even after the breakup.
他们即使分手后仍然关系很好。
idiom

once in a blue moon

非常罕见
Meaning
very rarely
Example
I only see him **once in a blue moon**.
我很少见到他。
idiom

on one’s last legs

接近力气或生命的尽头
Meaning
to be near the end of one’s strength or life
Example
After the long hike, we were all **on our last legs**.
经过长时间的徒步旅行后，我们都快撑不住了。
idiom

on the market

可供出售
Meaning
available for sale
Example
Their house has been **on the market** for over six months.
他们的房子已经在市场上待了超过六个月。
idiom

open Pandora’s box

开始做会引发许多意想不到问题的事情
Meaning
to start something that causes many unforeseen problems
Example
Creating sentient AI could **open Pandora’s box** of ethical challenges.
创造有感知的人工智能可能会打开伦理挑战的潘多拉盒子。
idiom

out of the frying pan into the fire

从糟糕的情况进入更糟糕的情况
Meaning
to go from a bad situation to a worse one
Example
Leaving that job was like jumping **out of the frying pan into the fire**.
离开那份工作就像是跳**出火坑进火海**。
idiom

Old school

拥有传统的观念或价值观；不现代
Meaning
Having traditional ideas or values; not modern
Example
My father still prefers handwritten letters; he’s really **old school**.
我父亲仍然更喜欢手写信件；他真的是老派。
idiom

On the record

正式声明并可报告
Meaning
Officially stated and reportable
Example
She made her statement **on the record** during the interview.
她在面试中做了**正式声明**。
idiom

on your last legs

完全筋疲力尽或濒临崩溃
Meaning
completely exhausted or near collapse
Example
After working 18 hours straight, I was **on my last legs**.
连续工作了18小时后，我已经**精疲力尽**了。
idiom

One step at a time

逐渐处理任务，而不是一次完成所有的任务。
Meaning
Handle tasks gradually and not all at once.
Example
Don't stress, just take **one step at a time**.
别担心，只需**一步一步来**。
idiom

off the beaten track

在一个很少有人去的地方；偏远或不寻常
Meaning
in a place not visited by many people; remote or unusual
Example
We found a lovely beach **off the beaten track**.
我们发现了一个美丽的海滩，远离人群。
phrasal-verb

open up to someone

与您信任的人分享个人感受或问题
Meaning
to share personal feelings or problems with someone you trust
Example
He finally **opened up to** his friend about what he had been going through.
他终于**对他的朋友敞开心扉**，讲述了他经历的事情。
idiom

out of bandwidth

太忙或太累，无法处理更多任务
Meaning
too busy or overwhelmed to handle more tasks
Example
I’m **out of bandwidth** today, can we talk tomorrow?
我今天太忙了，我们明天可以谈吗？
idiom

Out of the frying pan and into the fire

从糟糕的情况进入更糟的境地。
Meaning
Going from a bad situation to an even worse one.
Example
Quitting that job put him **out of the frying pan and into the fire**.
辞掉那份工作让他从煎锅跳进了火坑。
idiom

own up to

承认或坦白你做错的事情
Meaning
to admit or confess to something you did wrong
Example
She finally **owned up to** breaking the vase.
她最终**承认**打破了花瓶。
phrasal-verb

open up to diversity

开放多样性
Meaning
to become accepting and appreciative of different backgrounds or perspectives
Example
Education helps people **open up to diversity** and reduce prejudice.
教育帮助人们开放多样性并减少偏见。
phrasal-verb

open toward

对某人表示温暖或接受
Meaning
to show warmth or acceptance toward someone
Example
He became more **open toward** his classmates.
他变得更加**对同学开放**。
idiom

on the house

免费；由店家招待
Meaning
free of charge; paid for by the establishment
Example
The drinks were **on the house** tonight.
今晚的饮料是店家请客的。
idiom

out of memory

无法清晰思考；精神上筋疲力尽
Meaning
unable to think clearly; mentally exhausted
Example
After working all night, I was completely **out of memory**.
通宵工作后，我精神上完全筋疲力尽。
idiom

one in a million

非常特别或稀有
Meaning
very special or rare
Example
Her kindness makes her **one in a million**.
她的善良使她成为**百万分之一**。
idiom

on the mend

从疾病或受伤中恢复
Meaning
recovering from an illness or injury
Example
I was sick last week, but I’m **on the mend** now.
我上周生病了，但现在正在恢复中。
idiom

on trial

正在被测试或审判
Meaning
being tested or judged
Example
The company is **on trial** for violating privacy laws.
该公司因违反隐私法而正在**受审**。
idiom

on the run

试图避开警察的追捕
Meaning
trying to avoid being caught by the police
Example
The suspect has been **on the run** for three days.
嫌疑人已经**on the run**三天了。
idiom

on background

提供给记者的信息，无法归属来源
Meaning
information given to a journalist that cannot be attributed to the source
Example
The official spoke **on background** about the new policy.
官方在**on background**谈论新政策。
idiom

opt out

选择不参与
Meaning
to choose not to participate
Example
Employees can **opt out** of the program if they want.
员工可以选择不参加该程序，如果他们愿意的话。
phrasal-verb

open up to challenges

愿意以信心面对或接受困难的情况
Meaning
to be willing to face or accept difficult situations with confidence
Example
If you want to grow, you must **open up to challenges** instead of avoiding them.
如果你想成长，你必须**open up to challenges**，而不是回避它们。
idiom

on the cutting block

被考虑为淘汰或停止
Meaning
being considered for elimination or discontinuation
Example
Due to budget cuts, several research projects are now **on the cutting block**.
由于预算削减，几个研究项目现在处于被淘汰的边缘。
idiom

on the rocks

处于困境或可能失败（特别是关系或婚姻）
Meaning
in trouble or likely to fail (especially a relationship or marriage)
Example
Their marriage is **on the rocks** after constant arguments.
他们的婚姻在**困境中**，因为不断争吵。
idiom

off the top of one's head

未经仔细思考或核对就说出某事
Meaning
to say something without thinking carefully or checking
Example
**Off the top of my head**, I think there are five options.
我想，大概有五个选项。
idiom

on your plate

需要你处理的责任或工作
Meaning
something that is your responsibility or job to handle
Example
I have too much **on my plate** right now with all the projects.
现在我有太多的事情 **在我的盘子里**，有所有的项目。
idiom

on the ball

机警、聪明并且反应迅速
Meaning
alert, smart, and quick to react
Example
You need to be **on the ball** to handle this job.
你需要非常机警才能处理这份工作。
phrasal-verb

open up to differences

接受并欣赏多样性
Meaning
to accept and appreciate diversity
Example
Children should learn to **open up to differences** from an early age.
孩子们应该从小学习**接纳差异**。
phrasal-verb

open up new perspectives

帮助某人以新的或不同的方式看待事物
Meaning
to help someone see things in a new or different way
Example
Traveling to different countries can **open up new perspectives** on life.
到不同的国家旅行可以 **开启新的视角** 关于生活。
idiom

open up about

分享个人的想法或感受
Meaning
to share personal thoughts or feelings
Example
He finally **opened up about** the project stress.
他终于谈到了项目压力。
phrasal-verb

open the lines of communication

在一段沉默之后重新开始交谈
Meaning
to start talking again after a period of silence
Example
She wanted to **open the lines of communication** with her best friend again.
她想再次与她最好的朋友**打开沟通渠道**。
idiom

on the front line

直接参与某事中最活跃或最危险的部分
Meaning
directly involved in the most active or dangerous part of something
Example
Doctors were **on the front line** during the pandemic.
在疫情期间，医生们**在前线**。
idiom

open one's heart

真诚地表达感受或情感
Meaning
to express feelings or emotions honestly
Example
She finally decided to **open her heart** and share her feelings.
她终于决定**敞开心扉**，分享她的感受。
idiom

out of one’s mind

疯狂或极度担忧
Meaning
crazy or extremely worried
Example
He must be **out of his mind** to drive so fast in the rain.
他一定是**疯了**，才会在雨中开车这么快。
phrasal-verb

overflow with

充满积极的情感或情绪
Meaning
to have a large amount of positive feeling or emotion
Example
The parents were **overflowing with** pride at their son’s success.
父母因儿子的成功而**满溢着**骄傲。
idiom

on the same page

对某事有相同的理解或达成一致意见
Meaning
to agree or have the same understanding about something
Example
Before we continue, let’s make sure we’re **on the same page**.
在我们继续之前，请确保我们**在同一页面**上。
phrasal-verb

open yourself up to feedback

愿意接受并接受建设性的批评
Meaning
to be willing to receive and accept constructive criticism
Example
To grow, you need to **open yourself up to feedback** from others.
要成长，你需要**愿意接受他人的反馈**。
idiom

on the radar

正在被监视或考虑的某事
Meaning
something that is being monitored or considered
Example
The new scientific theory is now **on the radar** of researchers across the world.
新的科学理论现在已经**在雷达上**，全球的研究人员都在关注。
idiom

offstage

在公众视野之外或私人生活中
Meaning
outside of public attention or in private life
Example
He is very different **offstage** than he appears in his shows.
他在舞台下的表现与他在节目中展现的完全不同。
idiom

out like a light

很快就睡着了
Meaning
to fall asleep very quickly
Example
He was **out like a light** as soon as his head hit the pillow.
他的头一碰到枕头就睡着了。
phrasal-verb

open hearts to

向其他文化的人们展示善良和接受
Meaning
to show kindness and acceptance toward people of other cultures
Example
We should **open our hearts to** people who are different from us.
我们应该**向不同于我们的人敞开心扉**。
phrasal-verb

open dialogue with

与其他文化或群体开始对话或讨论
Meaning
to start conversations or discussions with another culture or group
Example
The organization aims to **open dialogue with** minority communities.
该组织旨在**与**少数群体**开展对话**。
phrasal-verb

open up over

因某个特定话题分享个人想法
Meaning
to share personal thoughts because of a particular topic
Example
She finally **opened up over** her anxiety during group coaching.
她终于在小组辅导中分享了她的焦虑。
idiom

open-hearted

善良和诚实地表达感情
Meaning
kind and honest in expressing feelings
Example
She is an **open-hearted** person who always listens.
她是一个心地善良的人，总是倾听。
phrasal-verb

open oneself to

让自己体验或理解新思想或文化
Meaning
to allow oneself to experience or understand new ideas or cultures
Example
Living abroad helped him **open himself to** diverse ways of life.
在国外生活帮助他**开放自己**接受不同的生活方式。
idiom

on the fence

对某事感到不确定或犹豫不决
Meaning
undecided or unsure about something
Example
She’s still **on the fence** about moving abroad.
她仍然对是否搬到国外**在围栏上**。
idiom

on the go

总是忙碌或活跃；经常旅行
Meaning
always busy or active; traveling a lot
Example
She's always **on the go** with her work trips.
她总是忙于工作旅行。
idiom

on your shoulders

用来表示某人对某事负有责任
Meaning
used when someone has responsibility for something
Example
The success of this plan rests **on your shoulders**.
这个计划的成功取决于你。
idiom

out of orbit

失去控制; 偏离常规路线
Meaning
beyond control; off the usual path
Example
The project went **out of orbit** after the manager left.
项目在经理离开后**离轨**了。
idiom

on the world stage

在国际舞台上
Meaning
in the international arena or community
Example
The country's economy is now strong **on the world stage**.
这个国家的经济现在在国际舞台上很强。
phrasal-verb

open channels with

与个人或团体开始沟通
Meaning
to start communication with an individual or group
Example
The company **opened channels with** its overseas partners to share updates.
公司已与海外合作伙伴开通了渠道以分享更新。
idiom

Out of focus

不清楚或不专心
Meaning
Not clear or not paying attention
Example
He looked tired and completely **out of focus** during the meeting.
他在会议期间看起来很累，完全没有集中注意力。
idiom

on the dot

正好准时；守时
Meaning
exactly on time; punctual
Example
The meeting started **on the dot** at 10 a.m.
会议在早上10点**正好准时**开始。
idiom

on the up and up

诚实的；真诚的；没有参与任何不正当行为
Meaning
honest; truthful; not involved in any wrongdoing
Example
She’s always been **on the up and up** with me.
她一直对我非常诚实。
phrasal-verb

open yourself to experiences

愿意尝试新的文化活动或视角
Meaning
to be willing to try new cultural activities or perspectives
Example
When you **open yourself to experiences**, you grow beyond your comfort zone.
当你敞开心扉接受新的体验时，你会超越自己的舒适区。
idiom

on the horizon

即将发生
Meaning
likely to happen soon
Example
A new product launch is **on the horizon**.
新产品的发布即将到来。
phrasal-verb

opt for

选择一件事物而不是另一件事物
Meaning
to choose one thing instead of another
Example
We decided to **opt for** the smaller but cheaper apartment.
我们决定**选择**更小但更便宜的公寓。
phrasal-verb

open yourself up

使自己情感脆弱或诚实
Meaning
to make yourself emotionally vulnerable or honest
Example
It’s hard to **open yourself up** after being hurt.
在受伤后，**打开自己**是很难的。
idiom

off the hook

摆脱某事的指责或责任
Meaning
to be free from blame or responsibility for something
Example
He was **off the hook** after his friend confessed.
在他的朋友承认之后，他摆脱了责任。
idiom

off the cuff

没有准备的讲话或表演
Meaning
to speak or perform without preparation
Example
He gave an **off the cuff** remark that impressed everyone.
他发表了一个即兴的评论，给大家留下了深刻印象。
phrasal-verb

open out

变得更有信心，放松，并在情感上更具表现力。
Meaning
to become more confident, relaxed, and expressive emotionally
Example
He started to **open out** after making new friends at work.
他在工作中结交新朋友后开始变得更有信心。
idiom

old friend

你认识很久的朋友
Meaning
a friend you have known for a long time
Example
I met an **old friend** from college yesterday.
我昨天遇到了一个大学的老朋友。
idiom

out of left field

某事出乎意料或令人惊讶
Meaning
something unexpected or surprising
Example
His question came **out of left field** and shocked everyone.
他的提问**out of left field**，让所有人都感到震惊。
phrasal-verb

open doors for

为连接或合作创造机会或可能性
Meaning
to create opportunities or possibilities for connection or collaboration
Example
Joining community events can **open doors for** meaningful relationships.
加入社区活动可以为**有意义的关系打开大门**。
phrasal-verb

open out to

变得更加开放或欢迎新的文化或体验
Meaning
to become more receptive or welcoming toward new cultures or experiences
Example
Traveling helped her **open out to** different perspectives.
旅行帮助她更加开放地接纳不同的视角。
idiom

on the warpath

非常生气并且可能争论或打架
Meaning
very angry and likely to argue or fight
Example
She was **on the warpath** after hearing the bad news.
她听到坏消息后非常生气。
idiom

over the moon

非常高兴或开心
Meaning
extremely pleased or happy
Example
She was **over the moon** when she won the prize.
她在赢得奖品时**over the moon**。
phrasal-verb

open eyes to

使某人意识到或了解某些重要的事情
Meaning
to make someone realize or become aware of something important
Example
The film **opened people’s eyes to** the struggles of the poor.
这部电影让人们**睁开眼睛**看到了贫穷的斗争。
idiom

old flame

曾经有过浪漫关系的人
Meaning
a person one had a romantic relationship with in the past
Example
He met his **old flame** at the reunion.
他在聚会上遇见了他的**老情人**。
idiom

own up to your mistakes

承认你做错了事
Meaning
to admit that you have done something wrong
Example
It takes courage to **own up to your mistakes**.
承认自己的错误需要勇气。
phrasal-verb

open around

与附近的人友好并且情感上可接触
Meaning
to act friendly and emotionally available with people nearby
Example
She always **opens around** people she trusts.
她总是向她信任的人敞开心扉。
phrasal-verb

open up to ideas

接受新颖和不同的想法
Meaning
to be receptive to new and different ideas
Example
We should **open up to ideas** from junior staff as well.
我们也应该接受来自初级员工的想法。
phrasal-verb

open up markets

使贸易或商业机会可用；消除贸易障碍
Meaning
to make trade or business opportunities available; to remove barriers to trade
Example
The trade agreement helped **open up markets** for local exporters.
贸易协议帮助当地出口商打开了市场。
idiom

off to a flying start

以非常成功的方式开始某事，像旅行一样
Meaning
to begin something, like a journey, very successfully
Example
Our trip was **off to a flying start** with perfect weather.
我们的旅行以完美的天气顺利开始。
idiom

on good terms with

与某人保持友好和积极的关系
Meaning
having a friendly and positive relationship with someone
Example
She’s **on good terms with** her ex-husband for the kids’ sake.
她为了孩子和前夫保持着良好的关系。
phrasal-verb

open your heart

变得更加情感上可用或充满爱
Meaning
to become more emotionally available or loving
Example
She decided to **open her heart** to love again.
她决定再次**敞开心扉**去爱。
idiom

out for blood

极其决心打败或惩罚某人
Meaning
to be extremely determined to defeat or punish someone
Example
After losing last time, the team is **out for blood** this season.
上次输了之后，队伍本赛季决心复仇。
phrasal-verb

open yourself emotionally

允许自己自由地感受和表达情感
Meaning
to allow yourself to feel and express emotions freely
Example
It's not easy to **open yourself emotionally** after being hurt.
在受伤后，**情感上敞开心扉** 并不容易
idiom

opt in

选择参与
Meaning
to choose to participate
Example
Employees can **opt in** to the wellness program.
员工可以选择参与健康项目。
idiom

out of this world

极其好或令人印象深刻
Meaning
extremely good or impressive
Example
The food at that restaurant is **out of this world**.
那家餐厅的食物令人赞叹。
phrasal-verb

own the mistake quickly

立即承认错误
Meaning
to admit an error right away
Example
I **own the mistake quickly** and explain the fix to my team.
我会立即承认错误，并向团队解释解决方案。
idiom

On the clock

工作中，通常有严格的时间限制或截止日期。
Meaning
Working, often with a strict time limit or deadline.
Example
I’m **on the clock** today, so I can’t waste any time.
我今天**在上班**，所以不能浪费时间。
idiom

Out of curiosity

出于想要知道或学习某事的愿望。
Meaning
Because of a desire to know or learn something.
Example
I asked him **out of curiosity**, not to interfere.
我出于**好奇**问了他，而不是为了干涉。
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。
phrasal-verb

open your mind to

开始考虑或接受新的思想或意见
Meaning
to start considering or accepting new ideas or opinions
Example
Studying anthropology can help you **open your mind to** cultural diversity.
学习人类学可以帮助你打开思维，接受文化多样性。
phrasal-verb

open the heart to

向某人表达真诚的情感
Meaning
to express your honest emotions to someone
Example
He finally **opened his heart to** his parents.
他终于 **向父母敞开了心扉**。
idiom

offline mode

断开互联网或无法使用的状态
Meaning
a state of being disconnected from the internet or unavailable
Example
He’s been in **offline mode** all weekend, not answering any messages.
他整个周末都处于离线模式，没有回复任何消息。
idiom

on the gravy train

处于一种通过少量努力赚取大量金钱的状态
Meaning
to be in a situation where one makes a lot of money with little effort
Example
He’s been riding **on the gravy train** since he took over the family business.
自从接管家族企业以来，他一直在**格雷维火车**上。
phrasal-verb

own up to mistakes

公开承认错误，以便可以修正
Meaning
to admit errors openly so they can be fixed
Example
Good leaders **own up to mistakes** before they snowball.
好的领导者在错误变得严重之前会承认错误。
phrasal-verb

open up new horizons

创造新的机会以学习或理解不同的文化
Meaning
to create new opportunities for learning or understanding different cultures
Example
Studying abroad can **open up new horizons** for personal and cultural growth.
出国留学可以为个人和文化成长**打开新的视野**。
idiom

out of the box thinking

以新颖、创新或创造性的方式思考
Meaning
thinking in a new, innovative, or creative way
Example
The solution requires **out of the box thinking** from all team members.
该解决方案需要所有团队成员进行**跳出思维定式的思考**。
idiom

on the spot

立即做出决定
Meaning
to make a decision immediately
Example
He was asked to decide **on the spot**.
他被要求**当场**做出决定。
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

outsmart the algorithm

击败或欺骗使用人工智能或自动化的系统
Meaning
to beat or trick a system that uses AI or automation
Example
People try to **outsmart the algorithm** to boost their posts.
人们试图通过**欺骗算法**来增加他们的帖子曝光。
phrasal-verb

open up space for joy

在痛苦之后为快乐腾出情感空间
Meaning
to make emotional room for happiness after pain
Example
After forgiving herself, she began to **open up space for joy**.
原谅自己后，她开始为快乐腾出空间。
idiom

Open a can of worms

开始做一些会带来许多新问题的事情。
Meaning
To start something that creates many new problems.
Example
By questioning the policy, he **opened a can of worms**.
通过质疑政策，他**打开了一罐蠕虫**。
idiom

on the big screen

出现在电影中
Meaning
appearing in a cinema film
Example
Her novel was adapted **on the big screen** last year.
她的小说去年在**大银幕上**改编。
idiom

overnight success

一个人或物品非常快速地变得成功
Meaning
a person or thing that becomes successful very quickly
Example
Her first song made her an **overnight success**.
她的第一首歌让她成为了**一夜成名**。
idiom

Out of fashion

不再流行或受欢迎
Meaning
No longer trendy or popular
Example
Those jeans went **out of fashion** years ago.
那些牛仔裤多年前就不流行了。
phrasal-verb

open with

通过做或说某事来开始某事
Meaning
to begin something by doing or saying something specific
Example
He **opened with** a personal story to connect with the audience.
他通过讲述一个个人故事开始，以便与观众建立联系。
idiom

on the money

完全正确或准确
Meaning
exactly correct or accurate
Example
His prediction about the stock was **on the money**.
他对股票的预测是 **on the money**。
phrasal-verb

open up emotionally

允许他人看到你的感受或情感状态
Meaning
to allow others to see your feelings or emotional state
Example
He started to **open up emotionally** after therapy.
他在治疗后开始**情感上开放**。
idiom

Open-minded

愿意考虑新的想法或意见。
Meaning
Willing to consider new ideas or opinions.
Example
A good therapist must be **open-minded**.
一个好的治疗师必须**思想开放**。
phrasal-verb

own responsibility for

接受你为发生的事情负责
Meaning
to accept that you are accountable for something that happened
Example
He chose to **own responsibility for** the team’s delay.
他选择为团队的延误负责。
idiom

Open book

一个容易理解或透明的人
Meaning
Someone who is easy to understand or transparent.
Example
She’s an **open book**; you always know what she’s thinking.
她是一本**open book**; 你总是知道她在想什么。
idiom

out of bounds

不允许或超出可接受的限制
Meaning
not allowed or beyond acceptable limits
Example
His rude comment was **out of bounds**.
他的粗鲁评论超出了界限
idiom

Out of sight, out of mind

当人或事物不可见或不在场时被遗忘。
Meaning
People or things forgotten when not visible or present.
Example
After moving away, our friendship faded—**out of sight, out of mind**.
搬家后，我们的友谊逐渐消退——**眼不见，心不烦**。
idiom

old friends are gold

老朋友是宝贵和珍贵的
Meaning
old friends are precious and valuable
Example
I always say, **old friends are gold**.
我总是说，**老朋友是黄金**。
idiom

on air

现场直播；在电视或广播中播放
Meaning
broadcasting live; being aired on television or radio
Example
The radio show will be **on air** from 7 to 9 PM.
广播节目将在晚上7点到9点**现场直播**。
idiom

on the rebound

在分手后不久开始一段新的关系
Meaning
starting a new relationship soon after a breakup
Example
He started dating again **on the rebound**.
他再次开始约会 **昂 迪 利宝德**。