The children were running back and forth between the playground and the swings. (孩子们在游乐场和秋千之间来回奔跑。)
We went back and forth on the decision before finally making up our minds. (我们在这个决定上反复权衡，最终下定决心。)
back of 在…后面
The parking lot is at the back of the building. (停车场在建筑物的后面。)
The important information is usually at the back of the book. (重要的信息通常在书的后面。)
back up后备,支援
Make sure you have a back up of your important files. (确保你有重要文件的备份。)
The team needed some extra back up to win the game. (这个团队需要一些额外的支援才能赢得比赛。)
bare of几乎没有,缺乏
The desert was bare of vegetation. (沙漠上几乎没有植被。)
The room was bare of furniture except for a single chair. (房间里除了一把椅子几乎没有家具。)
be able to do能够
With enough practice, you’ll be able to play the guitar. (通过足够的练习，你将能够弹吉他。)
I’m not able to attend the meeting tomorrow due to a prior engagement. (由于之前有约，我不能参加明天的会议。)
be around差不多
I think the meeting will be around 2 o’clock. (我想会议差不多是在2点左右。)
We’ve known each other for around 10 years. (我们认识彼此差不多10年了。)
be available to sb.可用,可供
The manager is available to answer any questions you may have. (经理可以回答你可能有的任何问题。)
The report will be available to download from the website starting next week. (该报告将从下周开始可供从网站下载。)
be bound to一定
If you don’t study, you’re bound to fail the exam. (如果你不学习，你一定会考试失败。)
With such a talented team, they’re bound to win the championship. (有如此出色的团队，他们一定会赢得冠军。)
be capable of doing能够
He’s capable of speaking multiple languages fluently. (他能够流利地说多种语言。)
The new software is capable of handling large amounts of data. (新软件能够处理大量的数据。)
be concerned with 关心…，涉足…
The company is concerned with reducing its carbon footprint. (公司关心减少自己的碳排放。)
The research is concerned with the effects of climate change on agriculture. (这项研究关注气候变化对农业的影响。)
be dying to渴望
She’s been dying to see that movie for months. (她渴望看那部电影已经数月了。)
He’s dying to try the new restaurant in town. (他渴望尝试镇上的新餐厅。)
be fed up with受够了be tired of
I’m fed up with all the traffic on my commute. (我受够了通勤路上的交通拥堵。)
She’s fed up with her job and is looking for something new. (她对自己的工作感到厌倦，正在寻找新的工作。)
be in hospital 住院
He’s been in hospital for a week with a broken leg. (他因为腿骨折已经住院一周了。)
She’s going to be in hospital for a few days after the surgery. (手术后她将在医院住几天。)
be in season 上市的
The farmer’s market only sells produce that’s in season. (农夫市场只卖上市的农产品。)
in peak season旺季
The hotel is fully booked during peak season. (旺季期间酒店已经订满。)
be in the mood to do sth. 想做
I’m not really in the mood to go out tonight. (今晚我不是很想出去。)
She’s in the mood to try something new for dinner. (她想尝试新的晚餐菜式。)
be pressed for time时间不够
Sorry, I can’t talk right now, I’m pressed for time. (对不起，我现在没时间说话。)
We’re a bit pressed for time, so let’s try to finish this quickly. (我们有点时间紧迫，所以让我们尽快完成这个任务。)
be tied up with忙于
I’m sorry I can’t make it to the meeting, I’m tied up with another project. (很抱歉我不能参加会议，我正忙于另一个项目。)
She’s tied up with work and won’t be able to come to the party. (她忙于工作，不能参加聚会。)
be under the weather 身体不好
I’m feeling a bit under the weather today, so I’m going to stay home. (我今天感觉有点不舒服，所以我要呆在家里。)
He’s been under the weather for a few days and hasn’t been able to come to work. (他身体不舒服几天了，不能来上班。)
beat around the bush 拐弯没角
Stop beating around the bush and just tell me what you want. (别拐弯抹角了，直接告诉我你想要什么。)
He’s always beating around the bush and never gets to the point. (他总是拐弯抹角，从不直接点题。)
beat the crowd 避开人群
We left early to beat the crowd at the amusement park. (我们早早离开，以避开游乐园的人群。)
If you want to get a good spot at the concert, you need to beat the crowd. (如果你想在音乐会上获得一个好位置，你需要避开人群。)
before long 不久以后
We’ll be there before long, just be patient. (我们很快就会到那里，耐心等待。)
Before long, the sun will set and it will be dark. (不久以后，太阳将落山，天就会黑下来。)
behind schedule 误点
The train is behind schedule and won’t arrive for another hour. (火车误点了，还要再等一个小时才到。)
We’re behind schedule on this project and need to work harder to catch up. (我们在这个项目上误点了，需要更加努力赶上进度。)
bent on sth. 下定决心做…
She’s bent on becoming a doctor and won’t let anything stop her. (她下定决心要成为一名医生，不会让任何事情阻止她。)
He’s bent on winning the competition and has been practicing every day. (他下定决心要赢得比赛，一直在每天练习。)
beside point 离题的,不相干的
That’s beside the point, we need to focus on the main issue. (那是离题的，我们需要集中精力处理主要问题。)
Bringing up his past mistakes is beside the point and won’t help us solve the problem. (提出他过去的错误是离题的，不会帮助我们解决问题。)
beyond one’s ability超越某人的能力
The task was beyond his abilities and he had to ask for help. (这项任务超出了他的能力范围，他不得不寻求帮助。)
Climbing the mountain was beyond my abilities, so I had to turn back. (攀登这座山超出了我的能力范围，所以我不得不回头。)
beyond question 毫无疑问
It’s beyond question that she’s the best candidate for the job. (毫无疑问，她是这个职位的最佳人选。)
The evidence is beyond question and proves his innocence. (证据毫无疑问，证明了他的清白。)
book on reserve 须留的图书
I need to put this book on reserve because it’s always checked out. (我需要把这本书须留，因为它总是被借走。)
The library requires a deposit to put a book on reserve. (图书馆需要交押金才能把书须留。)
booked up 订完了
I’m sorry, but all the tables are booked up for tonight. (很抱歉，今晚所有的桌子都订完了。)
The hotel is booked up for the weekend, so we’ll have to stay somewhere else. (酒店周末都订完了，所以我们得去别的地方住。)
bound for开往
The train is bound for New York City. (这趟火车开往纽约市。)
The plane is bound for Singapore and will take off in 30 minutes. (这架飞机开往新加坡，将在30分钟内起飞。)
break down抛锚
My car broke down on the way to work this morning. (今天早上我去上班的路上车子抛锚了。)
The elevator broke down and we had to take the stairs. (电梯出故障了，我们只能走楼梯。)
break though突破
She finally broke through her writer’s block and finished her novel. (她终于突破了写作障碍，完成了她的小说。)
The company’s new product is expected to break through the market and become a best-seller. (公司的新产品预计会突破市场，成为畅销品。)
break up with和某人分手be through with / be finished with
He broke up with his girlfriend last month. (他上个月和他的女朋友分手了。)
After years of fighting, she finally decided to break up with her business partner. (经过多年的争吵，她终于决定和她的商业合伙人分手。)
bring about 使…发生
The new law brought about significant changes in the education system. (新法律在教育系统中带来了重大的变革。)
His invention brought about a revolution in the field of technology. (他的发明在技术领域引起了一场革命。)
bring someone up to date 帮某人赶上
Can you bring me up to date on what happened while I was gone? (你能告诉我我不在的时候发生了什么吗？)
I need to bring my colleague up to date on the latest project developments. (我需要帮我的同事赶上最新的项目进展。)
help someone catch up 帮某人赶上
I need to help my friend catch up with the rest of the class after missing a week of school. (我需要帮助我的朋友在缺了一周学校后赶上班上其他同学。)
Our team needs to work together to help the new employee catch up with our project. (我们团队需要一起努力帮助新员工赶上我们的项目。)
by accident 偶然
I found this book by accident while browsing the shelves. (我在浏览书架时偶然发现了这本书。)
She met her future husband by accident when she missed her train. (她因为错过火车而偶然遇到了她的未来丈夫。)
by air 通过航空途径
I prefer to travel by air rather than by car. (我更喜欢乘飞机旅行，而不是开车。)
The package was shipped by air and arrived the next day. (包裹通过航空途径运送，第二天就到了。)
by all means 尽一切办法,务必
By all means, let’s go see the new movie tonight. (尽一切办法，我们今晚去看那部新电影吧。)
If you need any help, by all means, let me know. (如果你需要任何帮助，务必告诉我。)
by and by 不久,迟早
By and by, she became one of the most successful businesswomen in the country. (迟早，她成为了全国最成功的女商人之一。)
We’ll get through this rough patch by and by, just have patience. (我们迟早会度过这个艰难时期，只要有耐心。)
by chance 偶然,碰巧
I met my old friend by chance at the grocery store. (我在杂货店偶然遇到了我的老朋友。)
By chance, I found a rare book at the used bookstore. (碰巧，在二手书店我找到了一本珍贵的书。)
by far 最,…得多
This is by far the best pizza I’ve ever had. (这是我吃过的最好吃的披萨，毫无疑问。)
She is by far the most talented musician in the orchestra. (她是乐团中最有才华的音乐家，远远超过其他人。)
by hand 用手,用体力
The pottery was made by hand using traditional techniques. (这些陶器是用传统技艺手工制作的。)
We had to move all the furniture by hand because the elevator was broken. (由于电梯坏了，我们不得不用体力把所有家具搬走。)
by itself 自动地,独自地
The machine turns off by itself after it’s done running. (这个机器在运行完毕后会自动关闭。)
The picture is beautiful by itself, but it looks even better with a nice frame. (这张照片本身就很美，但用一个漂亮的相框装起来会更好看。)
by means of 用,依靠
We can solve this problem by means of negotiation. (我们可以通过谈判解决这个问题。)
The company increased its profits by means of cost-cutting measures. (公司通过削减成本来增加了利润。)
by mistake 错误地,无意地
I deleted the file by mistake and now I can’t find it. (我错误地删除了这个文件，现在找不到了。)
He took my bag by mistake because it looked similar to his own. (他无意地拿了我的包，因为它看起来和他自己的很相似。)
by no means 决不,并没有
By no means should you give up on your dreams. (你决不应该放弃你的梦想。)
This is by no means the end of the story, there’s more to come. (这并不是故事的结局，还有更多的内容。)
by oneself 单独地,独自地
He built the entire house by himself, without any help. (他独自一人建造了整座房子，没有任何帮助。)
She decided to go on the trip by herself to clear her mind. (她决定独自一人去旅行，让自己的思维清晰起来。)
by reason of 由于
The game was postponed by reason of the heavy rain. (由于大雨，比赛被推迟了。)
He was granted asylum by reason of his political beliefs. (由于他的政治信仰，他获得了庇护。)
by the way 顺便说说
By the way, have you heard about the new restaurant that just opened downtown? (顺便说说，你听说了刚在市中心开业的新餐厅吗？)
Oh, by the way, could you pick up some milk on your way home? (哦，顺便说一下，你回家的路上能买点牛奶吗？)
by virtue of 借助,由于
He won the race by virtue of his speed and endurance. (他凭借自己的速度和耐力赢得了比赛。)
By virtue of his hard work and dedication, he earned a promotion at work. (由于他的努力工作和奉献精神，他在工作中获得了晋升。)
by way of 经由,通过…方法
We can get to the beach by way of this hiking trail. (我们可以通过这条徒步小道到达海滩。)
I communicated with her by way of email since she lives in a different country. (由于她住在另一个国家，我通过电子邮件与她沟通。)
call off 取消
They had to call off the picnic due to the bad weather. (由于天气不好，他们不得不取消野餐。)
The wedding was called off at the last minute because the bride got cold feet. (新娘临时退缩，婚礼被取消了。)
call on 号召,邀请,点某人的名,拜访
The president called on the nation to come together in times of crisis. (总统号召全国在危机时刻团结一致。)
I’m going to call on my friend after work to see how she’s doing. (下班后我要去拜访我的朋友，看看她最近怎么样。)
capable of 能够
With hard work and dedication, anyone is capable of achieving their goals. (通过努力工作和奉献精神，任何人都能够实现自己的目标。)
This machine is capable of producing thousands of products per hour. (这台机器能够每小时生产数千个产品。)
careful of/about/with 小心,注意
Be careful of the slippery floor. (小心滑地。)
He’s always careful about what he eats because he has a sensitive stomach. (他总是小心注意自己吃什么，因为他的胃比较敏感。)
certain of/about 确信,肯定
I’m certain of his innocence. (我确信他是无辜的。)
Are you certain about the time of the meeting? (你确定会议的时间吗？)
chair a meeting 主持会议
The CEO will chair the meeting tomorrow. (明天CEO将主持会议。)
She’s been asked to chair the committee for the upcoming project. (她被要求主持即将开始的项目委员会。)
charge sb. with sth. 控告
The police charged him with theft. (警方控告他犯有盗窃罪。)
The prosecutor decided to charge the suspect with murder. (检察官决定控告嫌疑人谋杀罪。)
clear of 没有,不接触
Make sure the area is clear of any obstacles before starting the construction. (在开始建设之前，请确保该地区没有任何障碍物。)
He’s trying to stay clear of any drama in the office. (他试图避免卷入办公室的任何纷争。)
clever at 善于
She’s very clever at solving puzzles. (她非常善于解决难题。)
He’s clever at finding ways to save money. (他擅长想办法节省开支。)
close to 接近,亲近
The store is close to the train station. (商店离火车站很近。)
She’s very close to her grandmother. (她和她的祖母关系非常亲密。)
come in contact with 与…取得联系
I’ve never come in contact with anyone famous before. (我以前从未与任何名人接触过。)
He came in contact with the virus while traveling abroad. (他在国外旅行期间接触了病毒。)
come out of sth. alive 大难不死
Despite the dangerous situation, everyone came out of the accident alive. (尽管情况危险，每个人都大难不死地从事故中走了出来。)
He was lucky to come out of the war alive. (他很幸运能够在战争中生还。)
come up (with) 提出,拿出
She always comes up with creative ideas for our team projects. (她总是能够为我们的团队项目想出富有创意的想法。)
Can you come up with a plan to increase sales this quarter? (你能否提出一个计划来增加本季度的销售额？)
comparable to/with比作/比较
The new smartphone is comparable to the latest model from Apple. (这款新智能手机可以与苹果最新款相比。)
The growth of the company this year is not comparable with its performance last year. (公司今年的增长与去年的表现无法比较。)
The complexity of the situation is comparable to solving a Rubik’s Cube. (这种情况的复杂程度可以比作解决魔方。)
conscious of察觉到,意识到
She was conscious of someone following her in the dark alley. (她意识到有人在暗巷里跟踪她。)
The speaker was conscious of the audience’s reactions during his speech. (演讲者在演讲期间察觉到了听众的反应。)
We need to be conscious of our carbon footprint and reduce our impact on the environment. (我们需要意识到我们的碳足迹，减少对环境的影响。)
consequent on随之而来
The increase in demand for the product was consequent on its positive reviews. (对该产品的需求增加是由于它的好评。)
The company’s success was consequent on the hard work of its employees. (公司的成功是由于员工的努力工作。)
The delay in delivery was consequent on the bad weather conditions. (交货延迟是由于恶劣的天气条件。)
considerate towards体谅,体贴
She is always considerate towards her coworkers and tries to help them whenever possible. (她总是很体贴同事，尽可能地帮助他们。)
He was very considerate towards his girlfriend and always put her needs first. (他对女友非常体贴，总是把她的需求放在第一位。)
The hotel staff were very considerate towards their guests and went out of their way to make their stay comfortable. (酒店工作人员非常体贴客人，竭尽全力让他们的住宿舒适。)
contemporary with与…同时代
Shakespeare was a contemporary with Queen Elizabeth I. (莎士比亚与伊丽莎白一世同时代。)
The jazz musician Duke Ellington was contemporary with Louis Armstrong. (爵士音乐家杜克·艾灵顿与路易斯·阿姆斯特朗同时代。)
The philosopher Immanuel Kant was contemporary with the American Revolution. (哲学家伊曼纽尔·康德与美国革命同时代。)
content with满足于
She was content with her life as a teacher and didn’t aspire to become a principal. (她满足于自己作为一名教师的生活，不渴望成为校长。)
He was content with a simple lifestyle and didn’t need a lot of material possessions. (他满足于简单的生活方式，不需要很多物质财富。)
They were content with their modest home and didn’t feel the need to upgrade to a larger one. (他们对自己的普通住宅感到满意，不觉得需要升级到更大的房子。)
contrary to违反
His actions were contrary to the company’s code of conduct. (他的行为违反了公司的行为准则。)
Her beliefs were contrary to the mainstream view of society. (她的信仰与社会主流观点相违反。)
The politician’s statements were contrary to the facts of the situation. (政治家的言论与事实相违反。)
cost someone an arm and a leg代价很大
Sample sentence: The designer shoes she wanted to buy cost her an arm and a leg, so she decided to buy a cheaper alternative.
Chinese meaning: 她想买的那双设计师鞋代价很大，所以她决定买一个更便宜的替代品。
count down倒计时
Sample sentence: We are counting down the days until our vacation starts.
Chinese meaning: 我们正在倒计时直到我们的假期开始。
count one’s chickens before they are hatched过于乐观
Sample sentence: He was counting his chickens before they were hatched when he started planning his victory party before the election results were announced.
Chinese meaning: 当他在选举结果宣布之前就开始计划他的胜利派对时，他过于乐观了。
count on依靠
Sample sentence: I can always count on my best friend to be there for me when I need her.
Chinese meaning: 我总是可以依靠我最好的朋友在我需要她的时候。
count on依靠
Sample sentence: You can count on me to finish the project on time.
Chinese meaning: 你可以依靠我按时完成这个项目。
count the day期待
Sample sentence: She was counting the days until her wedding day.
Chinese meaning: 她期待着自己的婚礼日子的到来。
count the day期待
Sample sentence: We are counting the days until the release of the new album.
Chinese meaning: 我们期待着新专辑的发布日子的到来。
counter to与…相反
Sample sentence: His actions were counter to what he had promised earlier.
Chinese meaning: 他的行动与他之前的承诺相反。
crazy about热衷,着迷
Sample sentence: She is crazy about playing the guitar and practices every day.
Chinese meaning: 她热衷于弹吉他，每天都练习。
critical of挑剔,批评
Sample sentence: He is very critical of her work and always finds something to complain about.
Chinese meaning: 他对她的工作非常挑剔，总是能找到一些要抱怨的地方。
cry in one’s beer借酒消愁
Sample sentence: After his girlfriend broke up with him, he went to the bar to cry in his beer.
Chinese meaning: 在女友分手后，他去酒吧借酒消愁。
cry on one’s shoulder依靠
Sample sentence: Whenever she needs someone to talk to, she knows she can cry on her best friend’s shoulder.
Chinese meaning: 每当她需要有人倾听时，她知道她可以依靠她最好的朋友。
curious about好奇,想知道
Sample sentence: He is curious about how the new technology works and wants to learn more.
Chinese meaning: 他好奇新技术的工作原理并想要了解更多。
cut down on 减少
Sample sentence: In an effort to be healthier, she is trying to cut down on her sugar intake.
Chinese meaning: 为了更健康，她正试图减少摄入的糖分。
cut down削减
Sample sentence: The company is planning to cut down on its expenses to save money.
Chinese meaning: 公司计划削减开支以节省钱。
cut in插入
Sample sentence: He cut in the conversation to add his own opinion.
Chinese meaning: 他插入谈话并发表自己的意见。
cut off切断
Sample sentence: The phone was cut off because the bill was not paid.
Chinese meaning: 电话被切断了，因为账单没有支付。
cut out切除
Sample sentence: The doctor had to cut out the infected tissue to prevent the spread of the infection.
Chinese meaning: 医生不得不切除受感染的组织，以防止感染的扩散。
cut someone short打断
Sample sentence: She cut him short because she didn’t want to hear any more excuses.
Chinese meaning: 她打断了他，因为她不想再听任何借口。
cut through抄近路
Sample sentence: To avoid traffic, we decided to cut through the park.
Chinese meaning: 为了避开交通，我们决定抄近路穿过公园。
cut up切碎
Sample sentence: She cut up the vegetables for the salad.