C2 noun /ˈfiːəlti/

fealty

忠诚与效忠

Meaning

loyalty or allegiance, especially to a sovereign or lord

Example

The knight swore fealty to his king.

骑士向国王宣誓效忠。

C1 adverb /ˈfɜː.vənt.li/

Fervently

热情地; 激情地;

Meaning

with passionate intensity; ardently; with great emotion or enthusiasm

Example

She fervently hoped that her dreams would come true.

她热情地希望她的梦想能成真。

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。

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。

B2 verb /flɪk/

flick

快速轻弹

Meaning

to move or cause to move with a sudden quick motion

Example

He flicked the switch to turn on the light.

他迅速地按下开关以打开灯。

C2 adjective /ˈfæsaɪl/

Facile

容易的; 浅显的; 缺乏深度的

Meaning

easily achieved; superficial; lacking depth

Example

His facile explanation didn't address the real problem.

他的简单解释没有解决真正的问题。

B1 noun /ˈfʌŋkʃən/

function

功能

Meaning

An activity or purpose natural to or intended for a person or thing.

Example

The main function of the heart is to pump blood.

心脏的主要功能是泵送血液。

B2 noun /faʊl/

Fowl

家禽

Meaning

a domesticated bird kept for meat or eggs; chicken or other poultry

Example

The farmer raised fowl in his backyard for fresh eggs and meat.

农民在后院养家禽，提供新鲜的鸡蛋和肉。

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。

B2 verb /ˈfæsən/

fasten

系紧

Meaning

To attach or secure something firmly in place

Example

Please fasten your seatbelt before the plane takes off.

请在飞机起飞前系好安全带。

B1 noun fləʊ

flow

流动

Meaning

The action or fact of moving along in a steady, continuous stream

Example

The flow of information must be secured.

信息流必须被确保。

B2 adverb /ˈfɜ:rmli/

Firmly

坚决

Meaning

in a strong, steady, and unwavering manner

Example

She firmly believed in her decision.

她坚信自己的决定。

C1 adjective /ˈfrɪvələs/

frivolous

轻浮

Meaning

Not having any serious purpose or value; silly or unimportant.

Example

She dismissed the frivolous complaint quickly.

她迅速驳回了这个轻浮的投诉。

B2 noun /fʌs/

Fuss

大惊小怪；无谓的烦恼

Meaning

unnecessary worry or bother about something; agitated excitement over a trivial matter

Example

She made such a fuss about the small stain on her dress that everyone noticed.

她因裙子上的小污点而大惊小怪，结果大家都注意到了。

C1 noun /ˈfaɪərɑːm/

firearm

火器

Meaning

a weapon capable of firing a projectile using gunpowder or other propellant

Example

The police found a hidden firearm during the investigation.

警方在调查过程中发现了一支隐藏的火器。

B1 adjective /ˈfrʌstreɪtɪd/

frustrated

沮丧

Meaning

feeling annoyed or upset because of inability to achieve something

Example

She felt frustrated after failing the exam.

她在考试失败后感到沮丧。

A2 adjective /fer/

Fair

公正的; 合理的; 吸引人的

Meaning

just and reasonable; treating people equally; light in color; attractive

Example

The judge made a fair decision in the case.

法官在案件中做出了公正的决定。

C1 adjective /flæmˈbɔɪənt/

flamboyant

华丽的、色彩斑斓的或自信的

Meaning

showy, strikingly bold or colorful; confident and lively

Example

His flamboyant style drew everyone's attention at the party.

他那华丽的风格吸引了派对上所有人的注意。

A2 noun /fɒks/

Fox

狐狸

Meaning

a wild animal related to dogs, with a pointed face and thick fur

Example

The red fox is known for its cunning nature.

红狐以其狡猾的天性而闻名。

B2 verb /fɔːrˈsiː/

foresee

预见

Meaning

To be aware of beforehand; to predict or expect.

Example

She could foresee the challenges ahead.

她能够预见到前方的挑战。

C1 adjective /ˈfɔːrθˌraɪt/

forthright

直率

Meaning

Direct and honest in speech or behavior; straightforward.

Example

She was forthright in her criticism of the policy.

她在批评政策时非常直率。

C1 adjective ˈfɔːr.mɪ.də.bəl

formidable

强大的

Meaning

Inspiring fear or respect through being impressively large, powerful, intense, or capable.

Example

The boxer was a formidable opponent in the ring.

那名拳击手是拳台上一个强大的对手。

C1 adjective /ˈfaɪ.naɪt/

Finite

有限的; 有边界的

Meaning

limited; having bounds or limits; not infinite

Example

Earth has finite natural resources.

地球有有限的自然资源。

A2 noun /ˈfɔːrənər/ or /ˈfɑːrənər/

foreigner

外国人

Meaning

A person from another country.

Example

The city welcomes every foreigner with kindness.

这个城市欢迎每一位外国人。

C1 noun /fruːˈɡæl.ə.ti/

frugality

节俭

Meaning

The quality of being economical in use or expenditure; not wasteful.

Example

Frugality is essential for saving money effectively.

节俭对有效节省钱至关重要。

A1 noun /ˈfɛb.ruˌɛr.i/

february

二月

Meaning

The second month of the year in the Gregorian calendar, typically having 28 days, or 29 in a leap year.

Example

My birthday is in February, so I always look forward to this month.

我的生日在二月，所以我总是期待这个月。

A2 noun /fɔːrk/

Fork

叉子

Meaning

a tool with two or more prongs used for eating or serving food

Example

Please use a fork to eat your salad.

请用叉子吃你的沙拉。

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。

B2 noun ˈfreɪm.wɜːk

framework

框架

Meaning

An essential supporting structure of a building, vehicle, or object; a basic structure underlying a system, concept, or text.

Example

A strong framework is vital for governance.

强大的框架对于治理至关重要。

B2 verb /flɪp/

flip

翻转

Meaning

to turn over quickly or suddenly; to toss lightly

Example

She flipped the pancake in the pan.

她把煎饼在锅里翻了个面。

B2 noun/adjective /ˈfluːɪd/

fluid

液体

Meaning

a substance that can flow easily, such as liquid or gas; smooth and adaptable

Example

The artist's fluid movements impressed the audience.

艺术家的流畅动作给观众留下了深刻的印象。

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。

C2 noun /ˈfɔːrʃɔːr/

foreshore

海滩

Meaning

The part of the shore between the high and low tide marks

Example

Children were playing on the foreshore, collecting shells.

孩子们在海岸上玩耍，捡贝壳。

B2 noun fəˈtiːɡ

fatigue

疲劳

Meaning

Physical or mental exhaustion due to prolonged exertion or mental stress

Example

Lack of sleep leads to extreme fatigue.

缺乏睡眠会导致极度疲劳。

A2 noun /ˈfiːvər/

fever

发烧

Meaning

a medical condition in which the body temperature is higher than normal

Example

He couldn’t go to work because he had a high fever.

他因高烧而不能上班。

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。

C1 verb /flɑp/

flop

失败

Meaning

to fall or move heavily and clumsily; to fail completely

Example

The new movie flopped at the box office.

新电影在票房上失败了。

A1 noun/verb /fɪlm/

film

电影

Meaning

a motion picture or movie; or to record on camera

Example

They watched a film together on the weekend.

他们在周末一起观看了一部电影。

B2 noun fɪkst ˈɪnkʌm

fixed income

固定收入

Meaning

Investment that provides a return in the form of fixed periodic payments.

Example

Fixed income investments provide reliable returns.

固定收益投资提供可靠的回报。

C1 noun /ˈfɔːrˌbɛərz/

forebears

祖先

Meaning

Ancestors or people in previous generations from whom one is descended.

Example

We must honor the traditions of our forebears.

我们必须尊重我们祖先的传统。

B1 adverb /ˈfʊli/

fully

完全

Meaning

completely or entirely; to the fullest extent

Example

She is fully aware of the risks.

她完全意识到这些风险。

C2 noun /ˈfɪɡmənt/

figment

虚构，想象

Meaning

something invented or imaginary; a fabrication of the mind

Example

The story of the haunted house is just a figment of her imagination.

鬼屋的故事只是她想象的产物。

C2 adjective fɔːˈtjuː.ɪ.təs

fortuitous

偶然的

Meaning

Happening by accident or chance rather than design; lucky or fortunate.

Example

Their meeting was purely fortuitous.

他们的相遇完全是偶然的。

C1 adjective /ˈfjuː.dəl/

feudal

封建的

Meaning

relating to the system of feudalism, a medieval social system based on land ownership and obligations

Example

The castle is a remnant of the feudal era.

城堡是封建时代的遗迹。

C2 adjective /ˈfæləbl/

fallible

容易犯错

Meaning

capable of making mistakes or being wrong

Example

Even experts are fallible and can make errors.

即使是专家也会犯错。

C1 adjective /frəˈnɛtɪk/

frenetic

狂乱的

Meaning

Fast and energetic in a wild or uncontrolled way.

Example

The stock market experienced frenetic trading after the announcement.

公告后股市经历了狂乱的交易。

B2 noun /ˈfɪks.tʃər/

fixture

固定物，安装设备

Meaning

a permanent or fixed object, often in a house or building

Example

The bathroom fixture was installed yesterday.

浴室设备昨天已安装。

C1 adjective /ˈfrɪdʒɪd/

Frigid

寒冷的; 冰冻的

Meaning

extremely cold; freezing; icy

Example

The frigid weather made it difficult to go outside.

寒冷的天气让出去变得困难。

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。

C1 noun /flæt fɪʃ/

Flat fish

比目鱼

Meaning

a type of fish with a flattened body that lives on the sea floor

Example

Flat fish like sole and flounder are excellent for grilling.

像鳎鱼和比目鱼这样的平鱼非常适合烤制。

C2 verb /fɪˈlɪsɪˌteɪt/

felicitate

庆祝

Meaning

to congratulate; to express good wishes

Example

We felicitated the graduating students at the ceremony.

我们在典礼上祝贺了毕业生。

C2 verb /fɔːrˈboʊd/

forebode

预示

Meaning

To predict or have a strong inner feeling of a future misfortune or evil.

Example

Dark clouds forebode a coming storm.

乌云预示着即将到来的风暴。

C2 noun /ˈfrɛs.koʊ/

fresco

壁画

Meaning

A painting done rapidly in watercolor on wet plaster so that the colors penetrate the surface

Example

The church walls were decorated with beautiful frescoes.

教堂的墙壁装饰着美丽的壁画。

C2 noun /ˈfaɪnəri/

finery

昂贵或精致的衣服

Meaning

expensive or elaborate clothes, decorations, or accessories

Example

She attended the party in her finest finery.

她穿着最好的衣服参加了聚会。

B2 noun /ˈfriː.kwən.si/

Frequency

频率

Meaning

the rate at which something occurs or is repeated over a particular period of time

Example

The frequency of earthquakes in this region has increased dramatically over the past decade.

这个地区的地震频率在过去十年中急剧增加。

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 adjective /ˈfɛmənɪn/

feminine

女性的

Meaning

having qualities traditionally associated with women; feminine in nature

Example

She has a very feminine style of dressing.

她有非常女性化的穿衣风格。

C2 noun /fluː/

flue

烟道

Meaning

A pipe or channel for smoke and waste gases produced by a fire, gas heater, or power station.

Example

The chimney flue needs to be cleaned regularly.

烟囱的烟道需要定期清理。

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。

B2 noun /ˈfɛə(r)nɪs/

fairness

公平

Meaning

the quality of being free from bias, favoritism, or injustice

Example

She always strives for fairness in her decisions.

她总是努力在决策中保持公平。

C2 noun /ˈflæɡ ˌɒfɪsər/

flag-officer

旗官

Meaning

a senior naval officer entitled to fly a flag to mark the command

Example

The flag-officer reviewed the fleet before the ceremony.

旗官在仪式前检查了舰队。

B1 noun fʌnd

fund

基金

Meaning

A sum of money saved or made available for a particular purpose.

Example

The government allocated a fund for disaster relief.

政府为灾难救援设立了一个基金。

C1 adjective /ˌfʊl ˈbɒd.id/

full-bodied

口感浓烈

Meaning

Having a strong, rich, and robust quality, especially of wine, coffee, or voice.

Example

He prefers a full-bodied red wine with his dinner.

他喜欢与晚餐搭配的口感浓烈的红酒。

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。

C1 noun /fiːnd/

fiend

恶魔，邪恶的人

Meaning

an evil spirit or demon; a wicked or cruel person; someone obsessed with a particular thing

Example

He is a real fiend when it comes to solving puzzles.

当涉及解谜时，他真的是个恶魔。

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。

B2 noun /ˈfrʌn.tɪər/

frontier

边界或新领域

Meaning

A new area of activity, knowledge, or development; the edge of knowledge or achievement.

Example

Robotic surgery is exploring a new frontier in medicine.

机器人手术正在医学领域探索新的前沿。

C1 adjective /ˈfɔːrsəbl/

forcible

强行

Meaning

Done by force; using physical strength or power.

Example

The police made a forcible entry into the house.

警方强行进入了房屋。

A1 number /ˈfɔːrti/

forty

幸福

Meaning

the number 40; ten times four

Example

She celebrated her forty years of life with a big party.

当她收到奖项时，她无法掩饰自己的幸福。

B2 verb, adjective /ˈfɒstər/

foster

培养

Meaning

to encourage the development of something; to raise a child that is not one's own

Example

The program aims to foster creativity in young students.

该计划旨在促进年轻学生的创造力。

B2 adjective /fɔːrˈsiːəbl/

foreseeable

可预见的

Meaning

Able to be predicted or expected in advance

Example

The company is unlikely to make changes in the foreseeable future.

公司不太可能在可预见的未来做出变化。

B2 adverb /ˌfʌndəˈmɛntəli/

fundamentally

从根本上

Meaning

in a basic and important way; at the core

Example

The two theories are fundamentally different.

这两个理论从根本上不同。

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。

C1 adjective + noun ˈfeɪvərəbəl klaɪˈmætɪk kənˈdɪʃənz

favorable climatic conditions

有利的气候条件

Meaning

Weather conditions that are suitable and beneficial for growth or development

Example

Winter offers favorable climatic conditions for farming.

冬天为农业提供有利的气候条件。

C1 noun /fəˈtæləti/

fatality

致命事故

Meaning

An occurrence of death by accident, disaster, or violence.

Example

The accident resulted in one fatality.

这场事故导致了一人死亡。

C2 adjective /fəˈloʊniəs/

felonious

与严重犯罪相关

Meaning

relating to or involved in serious criminal activity

Example

He was charged with felonious assault after the incident.

事件发生后，他因严重袭击被指控。

C2 adjective /ˈfɒksi/

foxy

狡猾

Meaning

Clever, cunning, or attractive.

Example

He came up with a foxy plan to win the game.

他想出了一个狡猾的计划来赢得比赛。

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。

B1 noun /fɒɡ/

Fog

雾

Meaning

a thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface that reduces visibility

Example

Dense fog covered the highway this morning.

今天早晨，浓雾覆盖了高速公路。

C2 noun /ˈfeɪ.tə.lɪ.zəm/

fatalism

宿命论

Meaning

the belief that all events are predetermined and inevitable

Example

He embraced fatalism, believing that nothing he did could change his destiny.

他接受了宿命论，相信无论他做什么，都无法改变他的命运。

B2 noun ˈfrʌn.tɪərz

frontiers

边界

Meaning

The extreme limit of settled land beyond which lies wilderness; the limits of knowledge or achievement in a particular field.

Example

The project pushes the frontiers of space exploration.

这个项目推动了太空探索的边界。

B2 noun/verb /ˈfɒs.tər.ɪŋ/

fostering

培养

Meaning

The process of encouraging or promoting the development or growth of something; nurturing and caring for.

Example

Good teachers play a key role in fostering creativity in students.

好老师在促进学生创造力方面发挥着关键作用。

C1 verb /ˈflaʊndər/

flounder

挣扎

Meaning

To struggle or stagger clumsily; to experience difficulty or confusion.

Example

He floundered in the interview when asked difficult questions.

当被问到困难的问题时，他在面试中挣扎。

A1 noun /ˈfraɪ.deɪ/

friday

星期五

Meaning

the day of the week following Thursday and preceding Saturday

Example

We have a team meeting every Friday afternoon.

我们每个星期五下午都有团队会议。

C2 adjective /ˈfʊtˌluːs/

footloose

自由自在

Meaning

Free to go anywhere or do anything; not tied down by responsibilities.

Example

After graduating, he felt footloose and ready to explore the world.

毕业后，他感到自由自在，准备探索这个世界。

B2 noun /ˈfæntəsi/

fantasy

幻想

Meaning

a creation of the imagination, especially something improbable or impossible

Example

She has a vivid fantasy about traveling to space.

她有一个关于太空旅行的生动幻想。

C2 adjective /fjuːˈɡeɪʃəs/

fugacious

短暂的

Meaning

Lasting only a short time; fleeting or ephemeral.

Example

Youth is beautiful but fugacious.

青春是美丽的，但它是短暂的。

C1 verb /ˈfɜːr.tɪ.laɪz/

fertilize

施肥

Meaning

to make soil or land more fertile by adding substances

Example

Farmers fertilize the fields to increase crop yield.

农民施肥以增加作物产量。

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。

C2 adjective /ˈfiːtɪd/

foetid

恶臭的

Meaning

having an offensive, unpleasant smell

Example

The foetid smell from the garbage made it hard to breathe.

垃圾散发出的恶臭使得呼吸变得困难。

B2 verb /fʊlˈfɪl/

fulfill

实现

Meaning

to complete or accomplish something, especially a task or promise

Example

He worked hard to fulfill his dreams.

他努力工作以实现自己的梦想。

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。

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。

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。

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, verb /ˈfɜːrloʊ/

furlough

临时休假

Meaning

temporary leave of absence from work, especially that granted to an employee or soldier

Example

Many workers were placed on furlough during the crisis.

许多工人在危机期间被放置在休假状态。

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。

A1 adjective /ˈfeɪ.məs/

famous

著名

Meaning

Known about by many people; renowned.

Example

This area is famous for its unique heritage.

这个地区因其独特的遗产而著名。

B2 noun /ˈfleɪvər/

flavor

味道

Meaning

The distinctive taste of a food or drink.

Example

This ice cream has a delicious mango flavor.

这款冰淇淋有美味的芒果味。

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 noun /ˈfɛndər/

fender

挡泥板

Meaning

a part of a vehicle that frames a wheel well to protect against mud or debris

Example

The car's fender was dented in the accident.

汽车的芬德尔在事故中被压凹了。

B2 adjective /ˈfɜːr.taɪl/

Fertile

肥沃的

Meaning

capable of producing abundant vegetation or crops; able to conceive children

Example

The fertile soil in this region makes it perfect for growing vegetables.

这个地区的肥沃土壤使其成为种植蔬菜的理想之地。

B2 noun fəˈtɪl.ɪ.ti

fertility

肥力

Meaning

The quality of being fertile; fruitfulness.

Example

Fertility of the soil is crucial for farming.

土壤的肥力对农业至关重要。

C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

逃犯

Meaning

a person who has escaped from a place or is in hiding, especially to avoid arrest

Example

The police launched a manhunt to capture the fugitive who escaped from prison.

警方展开了追捕行动，试图抓捕从监狱逃跑的逃犯。

C1 noun /fɑːrs/

farce

闹剧

Meaning

a comic dramatic work using buffoonery and horseplay, or a ridiculous situation

Example

The meeting turned into a complete farce with everyone arguing.

会议变成了一场彻底的闹剧，大家都在争论。

C2 adjective fəˈleɪ.ʃəs

fallacious

虚假的

Meaning

Based on false reasoning or misleading arguments.

Example

His argument was based on fallacious reasoning.

他的论点是基于虚假的推理。

C1 adjective /ˈfɪk.əl/

Fickle

多变的; 不稳定的; 善变的;

Meaning

changeable; inconstant; liable to sudden unpredictable change

Example

His fickle nature made it hard to trust his promises.

他那多变的个性使得信任他的承诺变得困难。

A2 noun /fæn/

Fan

粉丝; 扇子

Meaning

a person who has a strong interest in or admiration for a particular person or thing; a device for creating air current

Example

She is a huge fan of classical music and attends every concert in the city.

她是古典音乐的忠实粉丝，并参加城市中的每一场音乐会。

致命的

Meaning

causing death; leading to disaster

Example

The accident proved fatal for the driver.

事故对司机来说是致命的。