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C1 noun /ˈfɔːrɡraʊnd/

foreground

前景
Meaning
the part of a scene that is nearest to and in front of the viewer
Example
The flowers in the foreground brightened the picture.
前景的花朵使画面更加生动。
C1 adjective /ˈfɛrəl/

feral

野生的
Meaning
existing in a wild or untamed state; not domesticated
Example
The feral cat roamed the streets at night.
那只野猫在晚上游荡在街头。
C2 noun /fiːˈkʌndɪti/

fecundity

丰饶，繁殖力
Meaning
the ability to produce an abundance of offspring or new growth; fertility
Example
The fecundity of the river delta supports diverse wildlife.
河流三角洲的丰饶支持着多样化的野生动物。
A1 adjective/noun /fɔːrθ/

fourth

第四
Meaning
Constituting number four in a sequence; coming after the third in position.
Example
He finished in fourth place in the race.
他在比赛中获得了第四名。
B1 noun /fæts/

fats

脂肪
Meaning
Essential macronutrients that provide energy, support cell growth, and protect organs while helping absorb vitamins.
Example
Healthy fats from nuts and avocados support brain function.
来自坚果和鳄梨的健康脂肪支持大脑功能。
C2 adjective /ˈfraʊzi/

frowsy

邋遢
Meaning
Scruffy and neglected in appearance; musty or stale in smell.
Example
He wore a frowsy old jacket that smelled of damp.
他穿着一件邋遢的旧夹克，散发着潮湿的气味。
B2 noun /ˈfrɛʃnəs/

freshness

新鲜感
Meaning
The quality of being new, clean, and full of energy.
Example
The freshness of the morning air made everyone feel alive.
早晨的清新空气让每个人都感觉活力十足。
C1 adjective ˈflʌd proʊn

flood-prone

易受洪水影响
Meaning
Susceptible to flooding; likely to experience floods frequently.
Example
Bangladesh is a flood-prone deltaic nation.
孟加拉国是一个容易发生洪水的三角洲国家。
A2 noun /fiːld/

field

田野
Meaning
an area of open land, often used for farming, sports, or scientific study
Example
The children played football in the field.
孩子们在田野上踢足球。
A2 noun /ˈfɪt.nəs/

fitness

身体健康
Meaning
The condition of being physically fit and healthy, or the quality of being suitable to fulfill a particular role or task.
Example
Fitness tests ensure vehicle safety.
身体健康测试确保车辆安全。
C1 noun /ˈfoʊk.lɔːr/

folk-lore

民间传说
Meaning
The traditional beliefs, customs, stories, songs, and practices of a community, passed down through generations.
Example
Bangladeshi folk-lore is rich with myths and legends.
中国的民间传说充满了神话和传说。
A2 noun ˈfriː.dəm

freedom

自由
Meaning
The power or right to act, speak, or think as one wants without hindrance or restraint.
Example
Freedom empowers self-expression.
自由促进自我表达。
C2 adjective /ˈfɔːnɪŋ/

fawning

过分的恭维
Meaning
displaying exaggerated flattery or affection
Example
Her fawning compliments made everyone uncomfortable.
她过分的恭维让每个人都感到不自在。
A2 verb /friːz/

freeze

冻结
Meaning
to become solid due to cold; to preserve by cold
Example
Water freezes at zero degrees Celsius.
水在零摄氏度下结冰。
C2 noun /fækˈtoʊtəm/

factotum

全能工人
Meaning
an employee who does many different types of work; a general servant
Example
He worked as a factotum, handling both clerical and maintenance duties.
他作为一个全能工人工作，处理行政和维护任务。
A2 noun /ˈfæktəri/

factory

工厂
Meaning
A building or group of buildings where goods are manufactured.
Example
He works in a shoe factory.
他在一家鞋厂工作。
C2 adjective /ˈfæn.sɪ.ləs/

fanciless

没有想象力的，普通的
Meaning
without imagination or creativity; plain or ordinary
Example
His drawings were simple and fanciless.
他的画作既简单又没有想象力。
B2 adjective /ˈfæktʃuəl/

Factual

基于事实的; 真实的
Meaning
based on facts; accurate; true
Example
The report contains only factual information.
报告仅包含事实性的信息。
C1 noun /fruˈɪʃən/

fruition

实现
Meaning
The realization or fulfillment of a plan, project, or desire.
Example
Her dream of becoming a doctor finally came to fruition.
她成为医生的梦想终于实现了。
C2 noun /ˈflɛkʃən/

flection

弯曲
Meaning
The act of bending or the state of being bent, especially of a limb or joint.
Example
The doctor tested the patient's knee flection during the examination.
医生在检查过程中测试了病人的膝盖弯曲。
C2 verb /ˈfʌdəl/

fuddle

使困惑
Meaning
To confuse or stupefy, especially with alcohol or overwhelming information.
Example
The complicated instructions fuddled the new employees.
复杂的指令使新员工感到困惑。
C1 noun ˈfæl.ə.si

fallacy

谬误, 错误的信念, 错误推理
Meaning
False belief, misconception, false reasoning.
Example
The idea that success comes easy is a fallacy.
成功容易到来的这个想法是一个谬误。
A2 adjective /ˈfraɪtənd/

frightened

害怕的
Meaning
feeling fear or anxiety; scared
Example
The child was frightened by the loud noise.
孩子被巨大的噪音吓到了。
C1 noun /fɪˈnænʃɪər/

financier

金融家
Meaning
a person who manages large amounts of money or investments
Example
The financier advised the company on its investments.
金融家为公司提供了关于投资的建议。
B1 noun /ˈfæktər/

factor

因素
Meaning
A circumstance, fact, or influence that contributes to a result.
Example
Weather is an important factor in crop production.
天气是作物生产中的一个重要因素。
A1 adjective /ˈfʌn.i/

Funny

有趣的; 奇怪的; 好笑的;
Meaning
humorous; strange; amusing;
Example
He told a funny joke that made everyone laugh.
他讲了一个有趣的笑话，让大家都笑了。
C2 noun /flɛk/

fleck

小斑点
Meaning
a small spot or mark, often of a different color
Example
There was a fleck of paint on the floor.
地板上有一个小斑点。
B2 verb /feɪd/

fade

褪色
Meaning
To gradually lose brightness, color, or strength.
Example
The colors of the old photo have started to fade.
老照片的颜色开始褪色。
C2 noun /ˈfɪli/

filly

小母马
Meaning
a young female horse
Example
The filly ran swiftly across the meadow.
这匹小母马在草地上跑得很快。
C2 verb /flɛdʒ/

fledge

飞翔
Meaning
To develop wing feathers large enough for flight; to bring up until able to fly.
Example
The young birds will fledge in a few weeks.
年轻的鸟将在几周内学会飞行。
C2 adjective/noun /fɪˈduː.ʃi.er.i/

fiduciary

信托的
Meaning
Involving trust, especially with regard to the relationship between a trustee and a beneficiary.
Example
Banks have fiduciary duties towards their clients.
银行对客户有信托责任。
C2 adjective /ˈfiːbəlˌmaɪndɪd/

feebleminded

愚蠢或心智薄弱
Meaning
lacking intelligence or mental capacity; foolish or weak-minded
Example
The feebleminded man struggled to understand basic instructions.
那个心智薄弱的人很难理解基本的指示。
A2 noun /fluː/

flu

流感
Meaning
a contagious viral illness causing fever, aches, and respiratory symptoms; influenza
Example
She stayed home because she had the flu.
她因为得了流感待在家里。
C1 adjective /ˈflaʊəri/

flowery

花哨的 / 装饰的
Meaning
Full of flowers or overly elaborate in style or language.
Example
She wrote a flowery letter filled with poetic phrases.
她写了一封充满诗意的花哨信。
C2 verb /fɪltʃ/

filch

偷
Meaning
to steal something in a sneaky or petty way
Example
He tried to filch a candy bar from the shop.
他试图从商店偷一块糖果。
C1 noun /ˈfræk.tʃər/

Fracture

骨折; 骨裂
Meaning
the cracking or breaking of a hard object or material; a break in a bone
Example
The doctor confirmed that he had a hairline fracture in his wrist.
医生确认他在手腕上有一条细小的骨折。
B2 adjective /ˈfɪr.fəl/

fearful

害怕的
Meaning
feeling afraid or showing fear
Example
She was fearful of walking alone at night.
她害怕夜晚独自走路。
B1 noun /feɪk/

Fake

伪造品; 欺诈; 假物品
Meaning
a thing that is not genuine; a forgery or sham
Example
The painting was discovered to be a fake worth very little money.
这幅画被发现是一幅伪造品，价值非常低。
A2 adjective /ˈfaɪ.nəl/

Final

最后的; 决定性的; 终极的
Meaning
last; concluding; decisive; ultimate
Example
This is the final exam of the semester.
这是本学期的最终考试。
A2 verb /faʊnd/

found

创立
Meaning
to establish or create something; to discover
Example
They founded the company in 1995.
他们在1995年成立了公司。
C1 adjective /ˈfɜːr.vənt/

fervent

热情的，激情四射的
Meaning
having or showing intense passion or enthusiasm
Example
She gave a fervent speech about climate change.
她发表了关于气候变化的热情演讲。
A2 adverb /ˈfaɪ.nəl.i/

Finally

终于
Meaning
at last; after a long time; in the end; as the last point
Example
After years of hard work, she finally achieved her goal.
经过多年的努力工作，她终于达成了自己的目标。
C1 noun /frɪˈvɒləti/

frivolity

轻浮
Meaning
Lack of seriousness; silly or trivial behavior.
Example
The teacher discouraged frivolity during the exam.
老师在考试期间阻止了轻浮行为。
A2 verb /fiːd/

feed

喂
Meaning
to give food to a person or animal
Example
She feeds the birds every morning.
她每天早上喂鸟。
B2 adjective, verb (present participle) /ˈfloʊtɪŋ/

floating

浮动
Meaning
remaining on the surface of a liquid without sinking; moving lightly or freely
Example
The boat was floating gently on the calm lake.
船在平静的湖面上轻轻浮动。
C2 adjective /ˈfraʊzi/

frowzy

邋遢
Meaning
Unkempt, messy, or having a musty, unpleasant smell.
Example
He entered the room with a frowzy appearance after sleeping on the couch.
他在沙发上睡觉后，以邋遢的外貌走进了房间。
B2 noun /ˈfækəlti/

faculty

能力, 系
Meaning
an inherent mental or physical ability; a division of a university
Example
She has a remarkable faculty for languages.
她有惊人的语言能力。
A1 noun /faɪv/

five

五
Meaning
The number 5; one more than four and one less than six.
Example
She bought five apples from the market.
她从市场买了五个苹果。
B2 noun /fiːst/

Feast

盛宴; 宴会
Meaning
a large meal, typically one in celebration of something; an annual religious celebration
Example
The wedding feast included traditional dishes from both families' cultures.
婚礼盛宴包括了来自双方家庭文化的传统菜肴。
C2 noun /ˈfɔːrˌpiːk/

forepeak

船头舱
Meaning
The compartment in the forward part of a ship, often used for storage.
Example
The sailors stored extra ropes in the forepeak.
水手们将额外的绳索存放在船头舱里。
C1 noun /ˈfɔːrˌθɔːt/

forethought

预见
Meaning
careful consideration of what will be necessary or may happen in the future
Example
With a little forethought, we could have avoided the problem.
稍微有一点预见性，我们本可以避免这个问题。
C1 verb /ˈfrɒlɪk/

frolic

欢快地玩耍
Meaning
to play and move about cheerfully, energetically, or playfully
Example
The children frolicked in the garden all afternoon.
孩子们整个下午在花园里欢快地玩耍。
B1 noun /ˈfeɪ.vər/

Favour

好意; 帮助; 仁慈
Meaning
approval, support, or liking for someone or something; a kind or helpful act
Example
Could you do me a favour and help me move this heavy box?
你能帮我一个忙，帮我搬动这个重箱子吗？
C1 verb ˈflʌk.tʃu.eɪt

fluctuate

波动
Meaning
To regularly increase or decrease.
Example
Stock prices fluctuate due to market conditions.
股价因市场条件而波动。
C1 adjective /ˈfræɡməntɪd/

fragmented

碎片化, 分割, 不完整
Meaning
Having been broken into fragments; disjointed or incomplete.
Example
The information was fragmented and difficult to understand.
信息被碎片化了，难以理解。
C2 adjective /ˈfraɪəbl/

friable

脆弱
Meaning
Easily crumbled or reduced to powder.
Example
The old brick wall was friable and broke apart at a touch.
那堵老砖墙是脆弱的，轻轻一碰就破裂了。
C1 verb /feɪn/

feign

假装, 装作
Meaning
to pretend or fake; to give a false appearance of
Example
She feigned illness to avoid going to work.
她假装生病以避免去工作。
C1 adjective /fəˈnætɪkəl/

fanatical

狂热的
Meaning
showing extreme enthusiasm or obsession
Example
She has a fanatical interest in collecting vintage stamps.
她对收藏老式邮票有着狂热的兴趣。
C1 noun /ˈfɒdər/

fodder

饲料
Meaning
food for livestock such as cattle, horses, or sheep; also something considered of little value but used to supply a demand
Example
The farmer stored enough fodder for the cattle to last through winter.
农民储存了足够的饲料，以便牲畜能度过冬天。
A2 noun /ˈfæʃ.ən/

fashion

时尚
Meaning
a popular or accepted style of clothing, behavior, or way of doing something
Example
She always keeps up with the latest fashion.
她总是跟上最新的时尚。
C1 noun ˌfiː.zəˈbɪl.ə.ti

feasibility

可行性
Meaning
The state or degree of being easily or conveniently done; possibility.
Example
The company conducted a feasibility study before launching the project.
公司在启动项目之前进行了可行性研究。
C2 adjective /ˈflɒrɪd/

florid

过度装饰的 / 红润
Meaning
Having a red or flushed complexion; or excessively ornate and intricate.
Example
The speaker’s florid style made the lecture hard to follow.
演讲者过度装饰的风格使得讲座难以理解。
C1 verb /fɔːrˈɡoʊ/

forgo

放弃
Meaning
to decide not to do or have something
Example
She decided to forgo dessert to maintain her diet.
她决定放弃甜点以保持她的饮食。
B2 noun /ˈfɛmənɪst/

feminist

女性主义者
Meaning
a person who supports equal rights and opportunities for women and men
Example
She proudly calls herself a feminist and fights for gender equality.
她自豪地称自己为女性主义者，并为性别平等而奋斗。
B2 noun ˈfjuː.tʃɚ ˌdʒen.əˈreɪ.ʃənz

future generations

未来几代人
Meaning
People who have not yet been born, considered in terms of the environment or society they will inherit.
Example
Sustainable development ensures a better life for future generations.
可持续发展确保未来几代人更好的生活。
A1 number /ˌfɪfˈtiːn/

fifteen

十五
Meaning
the number 15
Example
There are fifteen students in the class.
班里有十五个学生。
C2 adjective /ˈfætʃuəs/

fatuous

愚蠢
Meaning
silly or foolish, especially in a self-satisfied way
Example
His fatuous comments during the meeting annoyed everyone.
他在会议中的愚蠢评论让所有人都感到烦恼。
B2 adjective /ˈflʌfi/

fluffy

幸福
Meaning
soft, light, and airy in texture
Example
She baked a fluffy cake for the party.
当她收到奖项时，她无法隐藏自己的幸福。
B2 adjective /fræŋk/

Frank

诚实的; 坦率的; 直率的; 真诚的
Meaning
honest; open; straightforward; candid
Example
She gave me a frank opinion about my presentation.
她对我的演讲给出了直率的意见。
B2 noun /ˈfeɪ.lɪŋ/

Failing

失败; 缺点; 弱点
Meaning
a weakness, especially in a person's character; a fault
Example
His only failing is that he talks too much during meetings.
他唯一的失败是他在会议中说得太多。
B2 verb ˈfaɪ.nəl.aɪz

finalize

最终确定
Meaning
To complete arrangements for something; put into final form.
Example
The treaty was finalized after the discussions.
协议在讨论后最终确定。
C2 adjective /ˈflʌməksd/

flummoxed

困惑的
Meaning
Completely confused or bewildered.
Example
He looked flummoxed after hearing the strange question.
他听到那个奇怪的问题后，看起来很困惑。
C2 noun /ˈflɛdʒlɪŋ/

fledgeling

初生小鸟
Meaning
A young bird that has just developed its feathers and is learning to fly; a beginner.
Example
The fledgeling was trying hard to take its first flight.
那只初生小鸟正在努力做第一次飞行。
B2 adjective /ˈfɛdərəl/

federal

联邦的
Meaning
Relating to the central government of a federation.
Example
The federal government passed a new law on healthcare.
联邦政府通过了一项关于医疗保健的新法律。
C2 noun /fez/

Fez

费兹帽
Meaning
a cone-shaped red hat with a tassel, traditionally worn by men in some Middle Eastern countries
Example
The traditional costume included a red fez with a black tassel.
传统服饰包括一顶红色的费兹帽和一个黑色的流苏。
C2 noun /ˈfɔːrˌnɑːlɪdʒ/

foreknowledge

预知
Meaning
Awareness of something before it happens or exists.
Example
The prophet claimed to have foreknowledge of the event.
先知声称他预知了这个事件。
B2 noun, verb /ˈfaɪlɪŋ/

filing

提交文件; 整理文件
Meaning
the act of submitting documents; the process of organizing papers
Example
The lawyer handled the filing of all court documents.
律师处理了所有法院文件的提交。
A2 adjective, adverb /ˈfʊl taɪm/

full-time

全职
Meaning
working or studying for the whole standard period of time
Example
She works full-time as a teacher.
她作为老师全职工作。
C2 verb /ˈfrʌktɪˌfaɪ/

fructify

使…成果丰硕
Meaning
To make fruitful or productive; to bear fruit.
Example
The new policies will help fructify the economic potential of the region.
新的政策将有助于使该地区的经济潜力丰产。
B2 noun /ˈfɪlmˌmeɪkər/

film-maker

电影制作人
Meaning
A person who directs or produces films
Example
The film-maker received an award for his latest documentary.
电影制作人因他最新的纪录片获得了奖项。
B2 adjective /fəˈbɪd.ən/

Forbidden

禁止的; 非法的
Meaning
not allowed; prohibited; banned
Example
Smoking is strictly forbidden in this building.
在这座建筑物内，吸烟是严格禁止的。
C1 noun flɛər

flair

天赋
Meaning
A natural ability to do something well.
Example
She has a flair for design, always creating visually stunning work.
她有设计的天赋，总是创造出视觉上令人印象深刻的作品。
C1 adjective /ˈfiːlaɪn/

feline

猫的特征
Meaning
relating to or characteristic of cats
Example
Her movements were graceful and almost feline in their elegance.
她的动作优雅，几乎像猫一样。
C2 adjective /ˈfʌsti/

fusty

陈腐的，霉臭的
Meaning
smelling stale, damp, or stuffy; old-fashioned
Example
The room smelled fusty after being closed for months.
房间在关了几个月后有了陈腐的味道。
B2 adjective /ˌfɔːrθˈkʌmɪŋ/

forthcoming

即将到来
Meaning
about to happen soon; willing to share information
Example
The company announced its forthcoming product launch.
公司宣布了即将到来的产品发布。
C1 noun /ˈfeɪvərɪtɪzəm/

favoritism

偏袒
Meaning
the practice of giving unfair preferential treatment to one person or group
Example
The manager was accused of favoritism towards certain employees.
经理被指控偏袒某些员工。
B2 noun /ˌfer.ˈwel/

Farewell

告别
Meaning
an act of parting or of marking someone's departure
Example
The company organized a farewell party for the retiring manager.
公司为即将退休的经理举办了告别派对。
C2 noun /ˈfoʊksl/

forecastle

船首舱
Meaning
The forward part of a ship below the deck, traditionally used as living quarters for the crew.
Example
The sailors gathered in the forecastle after their shift.
水手们在他们的班次结束后聚集在船首舱。
C1 noun /ˈfreɪlti/

frailty

脆弱
Meaning
The condition of being weak, delicate, or easily broken.
Example
Old age often comes with physical frailty.
衰老通常伴随着身体的脆弱。
B1 noun ˈfæmɪli triː

Family Tree

家谱
Meaning
A diagram showing the relationships between people in several generations of a family.
Example
Creating a family tree helps understand family history.
创建家谱有助于理解家庭历史。
C2 adjective /fɪˈdjuːʃəl/

fiducial

信任的，作为参考标准的
Meaning
based on trust or confidence; serving as a standard of reference
Example
The fiducial point on the map ensures accurate measurements.
地图上的菲杜西亚尔点确保了精确的测量。
C2 verb /fɪˈneɪɡəl/

finagle

通过聪明或欺骗得到某物
Meaning
to obtain something by cleverness or trickery
Example
He finagled a free ticket by pretending to be a VIP guest.
他通过假装是VIP客人来获得了一张免费票。
C2 verb /ˈfɛstər/

fester

恶化, 加剧
Meaning
to become worse or more intense, often through neglect or infection
Example
If grievances are ignored, they may fester into resentment.
如果不理会抱怨，它们可能会变成怨恨。
B1 noun /ˈfɔːr.mæt/

Format

格式
Meaning
the way in which something is arranged or set out; the shape, size, and presentation of a book or document
Example
Please submit your report in PDF format by the end of the week.
请在本周末之前以PDF格式提交您的报告。
B2 adjective /ˈfʌsi/

fussy

挑剔
Meaning
hard to please; very concerned with details
Example
The child is very fussy about what she eats.
这个孩子对她吃的东西非常挑剔。
A2 adjective /ˈfæstɪst/

fastest

最快的
Meaning
moving or capable of moving at the highest speed
Example
Usain Bolt is the fastest runner in the world.
尤塞恩·博尔特是世界上跑得最快的运动员。
C2 adjective /ˈfɪliəl/

filial

与儿子或女儿有关；表现出对父母的尊重或爱
Meaning
relating to a son or daughter; showing respect or affection toward parents
Example
He showed filial respect by caring for his aging parents.
他通过照顾年迈的父母展示了孝顺。
A2 adjective, adverb /ˈfæstər/

faster

更快
Meaning
moving or able to move quickly; more quickly than usual
Example
This car is faster than the old one.
这辆车比老车更快。
B2 verb fəˈsɪl.ɪ.teɪt

facilitate

促进
Meaning
Make an action or process easier or more achievable; to help bring about.
Example
Good infrastructure facilitates economic growth.
良好的基础设施促进经济增长。
A2 adjective /fɪfθ/

fifth

第五
Meaning
constituting number five in a sequence
Example
She lives on the fifth floor of the building.
她住在大楼的第五层。
C1 noun /faɪˈnælɪti/

finality

最终性
Meaning
the quality of being final or irreversible; a sense of conclusiveness
Example
The judge's decision gave the case a sense of finality.
法官的决定赋予案件一种最终性的感觉。
B1 noun /ˈfeɪvər/

favor

帮助
Meaning
An act of kindness or approval.
Example
She asked him for a small favor.
她请求了一个小忙。
A2 noun /ˈfɔːrɪst/

Forest

森林
Meaning
a large area covered chiefly with trees and undergrowth
Example
We went hiking in the dense forest yesterday.
我们昨天在密林中徒步旅行。
C2 adjective /ˈfɒp.ɪʃ/

Foppish

过度关注个人外貌和衣服；对穿着虚荣
Meaning
excessively concerned with one's appearance and clothes; vain about dress
Example
His foppish behavior and expensive clothes made him stand out.
他的foppish行为和昂贵的衣服使他与众不同。
A2 adjective /ˈfɔːrən/ or /ˈfɑːrən/

foreign

外国的
Meaning
Belonging to or coming from another country.
Example
She loves studying foreign languages.
她喜欢学习外国语言。
C1 verb /fɔrˈstɔl/

forestall

提前预防
Meaning
to prevent by acting in advance; to anticipate and counter
Example
They forestalled the crisis by taking immediate action.
他们通过立即行动避免了危机。
C1 noun /frɪndʒ/

fringe

装饰边缘 / 边界
Meaning
A decorative border of threads; the outer edge or margin of something.
Example
The festival had a fringe of small independent performances.
节日有一条小型独立表演的边缘。
B2 noun /fɪst/

Fist

拳头; 拳击
Meaning
a person's hand when the fingers are bent in toward the palm and held there tightly
Example
He raised his fist in victory after winning the championship match.
他在赢得冠军比赛后举起了拳头。
C1 noun ˌfræɡ.mənˈteɪ.ʃən

fragmentation

碎片化
Meaning
The process or state of breaking or being broken into fragments.
Example
Habitat fragmentation threatens many species.
栖息地的碎片化威胁着许多物种。
C2 adjective /ˈfɛstəl/

festal

节日的，庆祝的
Meaning
relating to a festival or celebration
Example
The hall was decorated in a festal manner for the wedding.
婚礼的大厅被装饰得节日气氛十足。
C1 noun /ˈfɔɪeɪr/

foyer

前厅
Meaning
An entrance hall or lobby in a building.
Example
The guests waited in the hotel foyer before checking in.
客人在酒店大厅等候办理入住手续。
B2 adverb /ˈfɔːrməli/

formally

正式地
Meaning
in a formal or official manner; according to established rules or conventions
Example
The agreement was formally signed by both parties.
该协议已由双方正式签署。
B2 noun /ˈfleɪ.vər/

Flavour

风味
Meaning
the distinctive taste of a food or drink; a particular quality or atmosphere
Example
The soup had a rich flavour of herbs and spices from the garden.
汤里有来自花园的丰富香草和香料味。
B2 noun /ˈfɔːrəm/

forum

论坛
Meaning
A place, meeting, or medium where ideas and views can be exchanged.
Example
The online forum allows people to discuss a wide range of topics.
在线论坛允许人们讨论广泛的主题。
B2 noun /flɛkˈsɪbɪləti/

flexibility

灵活性
Meaning
The quality of bending easily without breaking; willingness to change or compromise.
Example
The flexibility of the working hours made it easier to balance work and personal life.
工作时间的灵活性使得平衡工作和个人生活变得更加容易。
B1 adjective /ˈfluː.ənt/

Fluent

流利; 熟练
Meaning
able to speak a language easily and accurately; flowing smoothly and gracefully
Example
She is fluent in three languages including English and French.
她流利地讲三种语言，包括英语和法语。
C1 noun /ˈfɔːrˌbɛər/

forebear

祖先
Meaning
An ancestor, especially one who lived a long time ago.
Example
He often speaks of his forebears with great respect.
他常常带着极大的敬意谈论他的祖先。
B2 noun /fɔːrˈmeɪʃən/

formation

形成
Meaning
the action of forming or process of being formed
Example
The formation of the new company took several months.
新公司的形成花了几个月时间。
C1 noun /fɪkˈseɪ.ʃən/

fixation

固执的兴趣或对某事或某人的执念
Meaning
An obsessive interest in or feeling about someone or something.
Example
His fixation on perfectionism delayed project completion.
他对完美主义的固执导致项目完成的延迟。
C2 adjective /ˈfrɛtfəl/

fretful

焦虑的
Meaning
Feeling or showing distress or irritation.
Example
The baby was fretful all night and could not sleep.
宝宝整晚都很焦虑，无法入睡。
C1 verb, noun /ˈflʌstər/

fluster

使困惑
Meaning
to make someone agitated or confused
Example
The unexpected question flustered him.
这个意外的问题让他感到困惑。