fodder
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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。
A1 noun /fuːd/

food

食物
Meaning
any nutritious substance that people or animals eat or drink to maintain life and growth
Example
Rice is a common food in Asia.
米饭是亚洲常见的食物。
B1 noun /ˈfɪnɪʃ laɪn/

finish line

终点线
Meaning
The line or point at the end of a race or competition where participants complete it.
Example
She sprinted towards the finish line and won the race.
她冲向终点线并赢得了比赛。
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。
B1 noun /ˈfaɪ.tər/

Fighter

战斗机
Meaning
a military aircraft designed for attacking other aircraft; a person who fights
Example
The fighter jet flew overhead during the military parade.
战斗机在军事游行中飞过我们头顶。
B2 noun /fraɪt/

Fright

恐惧; 惊恐; 吓
Meaning
a sudden intense feeling of fear; a shock or surprise that causes fear
Example
The loud thunder gave her such a fright that she dropped her coffee cup.
那声雷鸣让她吓得掉了咖啡杯。
B1 adverb /ˈfɜːrstli/

firstly

首先
Meaning
used to introduce the first point or reason in a discussion or argument
Example
Firstly, we need to address the budget issue before proceeding.
首先，我们需要在继续之前解决预算问题。
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。
C1 verb /flɪntʃ/

flinch

退缩
Meaning
to suddenly move back or away due to fear or pain
Example
He didn’t flinch when the doctor gave him the injection.
他在医生给他打针时没有退缩。
B2 noun /fɜːr/

Fur

毛发
Meaning
thick hair covering the body of animals
Example
The cat's fur was soft and warm to touch.
猫的毛发触感柔软而温暖。
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。
C2 verb /ˈfrɪzəl/

frizzle

将食物炸至变脆并卷曲
Meaning
to fry something until it becomes crisp and curled, or to make a sizzling noise
Example
The bacon began to frizzle in the pan.
培根在锅中开始发出滋滋声。
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。
C1 noun /ˈfjuː.tʃə.rɪst/

futurist

未来主义者
Meaning
A person who studies or predicts the future, especially trends in science, technology, or society.
Example
The futurist predicted major changes in transportation within the next decade.
未来主义者预测了下一个十年交通运输的重大变化。
C1 adjective /ˈfuːlpruːf/

foolproof

万无一失
Meaning
Designed to be very easy to use or understand, leaving no possibility of failure or error.
Example
The new software has a foolproof installation process.
这款新软件具有万无一失的安装过程。
C1 adjective /fəˈnætɪk/

Fanatic

狂热者
Meaning
extremely passionate about something; showing excessive enthusiasm or devotion
Example
He is a fanatic supporter of his football team.
他是他足球队的狂热支持者。
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 /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。
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 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。
C1 noun/verb /freɪ/

fray

争斗, 磨损
Meaning
As a noun, a fight or heated dispute; as a verb, to unravel or wear out through friction.
Example
He tried to stay calm, but his nerves began to fray during the argument.
他试图保持冷静，但在争论中他的神经开始磨损。
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。
A1 verb /fɔːl/

fall

掉落
Meaning
to drop down from a higher place; to decrease; to happen or occur
Example
The leaves fall from the trees in autumn.
秋天，树叶从树上掉下来。
C2 adjective /ˈfɪnɪki/

finicky

难以取悦; 对细节非常挑剔
Meaning
difficult to please; very particular about details
Example
He is so finicky about his food that he only eats organic vegetables.
他对食物要求如此挑剔，甚至只吃有机蔬菜。
A2 noun /ˈfɜːrnɪtʃər/

furniture

家具
Meaning
Objects such as chairs, tables, beds, or cupboards used to make a room suitable for living or working.
Example
The living room was filled with beautiful wooden furniture.
客厅里摆满了美丽的木制家具。
B1 noun /fəˈsɪl.ɪ.ti/

facility

设施
Meaning
A place, amenity, or piece of equipment provided for a particular purpose.
Example
The facility was well-maintained.
设施保持得很好。
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 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 /ˈfræntɪk/

frantic

疯狂的
Meaning
Extremely anxious, hurried, or out of control due to fear or excitement.
Example
She made a frantic call to her family after the accident.
事故发生后，她紧急给家人打了电话。
C2 noun /fækˈsɪmɪli/

facsimile

传真副本
Meaning
an exact copy or reproduction of a document
Example
He sent a facsimile of the contract to the client.
他把合同的传真副本发送给了客户。
C1 adjective /ˈfɔːrmətɪv/

formative

形成性的
Meaning
Having a lasting influence on a person's development or character.
Example
Childhood is often described as a formative stage in life.
童年常被描述为人生中的一个形成性阶段。
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 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。
B1 noun /ˈfaɪəˌfaɪtə/

firefighter

消防员
Meaning
a person whose job is to put out fires
Example
The firefighter saved the family from the burning building.
消防员从燃烧的大楼中救出了那家人。
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。
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。
A2 noun /fɑːrm/

farm

农场
Meaning
an area of land used for growing crops and raising animals
Example
They live on a farm with many animals.
他们住在一个有许多动物的农场。
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。
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。
B1 noun /ˌfɜːrst eɪd kɪt/

first aid kit

急救箱
Meaning
A collection of medical supplies for giving initial treatment in emergencies
Example
I always keep a first aid kit in my car for emergencies.
我总是在车里备有急救箱以应对紧急情况。
C1 noun /ˈfaɪər.wɔːl/

firewall

防火墙
Meaning
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Example
A firewall protects networks from cyber-attacks.
防火墙保护网络免受网络攻击。
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。
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。
C2 verb /ˈfʊl.mɪ.neɪt/

fulminate

猛烈抗议
Meaning
To express strong protest or criticism loudly and forcefully; to explode violently.
Example
The politician began to fulminate against corruption.
政治家开始猛烈反对腐败。
B2 noun /ˈfræk.ʃən/

Fraction

分数; 部分
Meaning
a numerical quantity that is not a whole number; a small or tiny part of something
Example
Only a small fraction of the population voted in the local election.
只有一小部分人口在当地选举中投票。
C2 adjective /ˈfɪt.fəl/

fitful

间歇性
Meaning
occurring in irregular bursts; not continuous or steady
Example
He had a fitful sleep due to the storm.
由于暴风雨，他有间歇性的睡眠。
C2 adjective /fəˈlɪsɪtəs/

felicitous

恰当的, 合适的或令人愉快的; 由好运或幸福标志
Meaning
well-chosen, appropriate, or pleasing; marked by good fortune or happiness
Example
She made a felicitous remark that lightened the mood.
她做了一个恰到好处的评论，使气氛轻松了。
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 noun /ˈfriːˌmeɪsən/

freemason

共济会会员
Meaning
A member of an international fraternity known as Freemasonry, focused on moral and spiritual values.
Example
His grandfather was a respected freemason in the community.
他的祖父是社区中受人尊敬的共济会会员。
B2 adverb /fɔːrθ/

forth

向前
Meaning
forward in place, time, or order
Example
The leader stepped forth to address the crowd.
领导走上前去与人群讲话。
A1 noun /ˈfʊtˌbɔːl/

football

足球
Meaning
A team sport played with a ball that is kicked or carried to score points.
Example
They watched a football match on TV.
他们在电视上观看了一场足球比赛。
B1 adverb /ˈfriːkwəntli/

Frequently

频繁; 定期; 多次
Meaning
often; regularly; many times
Example
She frequently visits her grandmother on weekends.
她在周末经常探望她的祖母。
C1 adjective /ˈfeɪl.seɪf/

fail-safe

故障保护
Meaning
designed to prevent failure or accidents; guaranteed to work correctly
Example
The engineers installed a fail-safe mechanism in the nuclear plant.
工程师在核电厂安装了故障保护机制。
B2 noun /ˈfeð.ər/

Feather

鸟羽毛
Meaning
one of the light structures that cover a bird's body
Example
The peacock has beautiful colorful feathers.
孔雀有美丽的五彩斑斓的羽毛。
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。
B1 adjective /ˈfəʊkəst/

focused

专注
Meaning
Directing a great deal of attention or effort toward a particular activity, situation, or person.
Example
Staying focused during work hours enhances productivity.
在工作时间保持专注提高了生产力。
B1 noun /frʌˈstreɪʃən/

frustration

挫折
Meaning
The feeling of being upset or annoyed due to inability to achieve something.
Example
He felt deep frustration when his plans failed.
当他的计划失败时，他感到深深的挫折。
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。
B1 adjective /ˈflek.sə.bəl/

Flexible

灵活的；容易适应的
Meaning
able to bend easily; adaptable to change; not rigid
Example
She has a flexible work schedule that allows her to work from home.
她有一个灵活的工作时间表，允许她在家工作。
C1 verb /fɔːrˈseɪk/

forsake

Meaning
to abandon or give up something or someone
Example
He decided not to forsake his old friends despite his success.
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 /ˈfʊtɪdʒ/

footage

视频录制
Meaning
a recorded film or video, especially one that is used for news or documentaries
Example
The footage of the protest was shown on television all day.
抗议的录像整天在电视上播放。
C1 noun /ˌfɪɡjʊˈriːn/

figurine

小型装饰雕像
Meaning
a small ornamental statue or model of a human or animal
Example
She bought a porcelain figurine of a dancing ballerina.
她买了一尊舞蹈芭蕾舞者的瓷雕像。
B2 adjective /ˌfjuːtʃəˈrɪstɪk/

futuristic

未来主义的
Meaning
Having or involving very modern technology or design that is advanced beyond what is currently available
Example
Futuristic technologies are transforming industries worldwide.
未来主义技术正在改变全球的行业。
C2 verb /ˈfrɪtər/

fritter

浪费
Meaning
To waste time, money, or energy on trivial matters.
Example
He frittered away his savings on unnecessary gadgets.
他把储蓄浪费在了不必要的电子产品上。
C2 noun /ˈflɒtsəm/

flotsam

漂浮的残骸
Meaning
Floating debris from a shipwreck or things discarded and left floating.
Example
The beach was littered with flotsam after the storm.
暴风雨后，海滩上充满了漂浮的残骸。
C1 noun, verb /fɔːrd/

ford

浅滩
Meaning
A shallow place in a river where one can cross; to cross a river at such a place.
Example
The travelers decided to ford the river at dawn.
旅行者决定在黎明时分穿越河流。
B1 adjective /ˈfæʃənəbəl/

fashionable

时尚的
Meaning
Following the latest styles or trends in clothing, behavior, or ideas
Example
She always wears fashionable clothes to every party.
她总是在每个派对上穿时尚的衣服。
B2 adjective /ˈflɔː.ləs/

Flawless

完美的; 无缺陷
Meaning
perfect; without any defects or faults; immaculate
Example
Her flawless performance earned her a standing ovation.
她完美的表现为她赢得了全场起立的掌声。
A2 noun/verb /fɛns/

fence

篱笆
Meaning
a barrier, usually made of wood or wire, that surrounds an area; to enclose with a barrier
Example
They built a fence around the garden.
他们在花园周围建了一道篱笆。
A1 noun /faɪər/

Fire

火
Meaning
combustion or burning, in which substances combine chemically with oxygen from the air
Example
The fire in the fireplace provided warmth and a cozy atmosphere.
壁炉中的火提供了温暖和舒适的氛围。
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。
C2 adjective /fækˈtɪʃəs/

factitious

人为的，不真实的
Meaning
artificial or fabricated; not natural or genuine
Example
The excitement in his story seemed factitious and forced.
他的故事中的兴奋感看起来是人为的且强迫的。
B1 noun /ˈfɪkʃən/

fiction

虚构
Meaning
Literature created from the imagination, not presented as fact.
Example
She enjoys reading science fiction novels.
她喜欢阅读科幻小说。
A2 noun/adjective /ˈfiːmeɪl/

female

雌性
Meaning
a person or animal of the sex that can bear offspring; relating to women or girls
Example
The female lion protects her cubs fiercely.
母狮保护她的幼崽。
A1 noun ˈflaʊərz

Flowers

花
Meaning
The reproductive structures of plants that provide nectar for butterflies.
Example
Butterflies are attracted to colorful flowers.
蝴蝶被五彩斑斓的花朵吸引。
A1 noun /fʌn/

fun

乐趣
Meaning
enjoyment, amusement, or light-hearted pleasure
Example
We had a lot of fun at the party.
我们在聚会上玩得很开心。
C1 verb/noun ˈfæð.əm

fathom

理解
Meaning
To understand after much thought; to measure the depth of water; to comprehend.
Example
It is difficult to fathom the depths of the ocean.
很难理解海洋的深度。
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 noun /flʌd/

Flood

洪水
Meaning
an overflow of a large amount of water beyond its normal limits
Example
The heavy rain caused a flood in the village.
暴雨导致村庄发生了洪水。
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 adjective /ˈfækʃəs/

factious

分裂的
Meaning
causing disagreement or division within a group; inclined to form factions
Example
The debate became factious, splitting the committee into rival camps.
辩论变得分裂，委员会被分成了对立的阵营。
C2 adjective /ˈfrɪski/

Frisky

活泼的; 精力充沛的; 爱玩的; 淘气的
Meaning
lively; energetic; playful; mischievous
Example
The frisky puppy ran around the garden playfully.
那只活泼的小狗在花园里欢快地奔跑。
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。
C2 adjective /ˈfiːbraɪl/

febrile

发烧的，激动的
Meaning
having or showing the symptoms of a fever; or highly excitable or agitated
Example
The patient was in a febrile state with high temperature.
患者处于高温状态下的发烧状态。
C1 noun /fɪˈnɑːleɪ/

finale

结尾
Meaning
the last part or conclusion of a performance, event, or series
Example
The concert ended with a spectacular finale.
音乐会以一个壮观的菲纳尔结束。
A2 noun /ˈfɪɡ.jər/

Figure

数字; 形象; 数量;
Meaning
a number, especially one which forms part of official statistics; the shape of a human body
Example
The sales figure for this quarter exceeded all expectations.
这个季度的销售数字超过了所有的预期。
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 noun /fækt/

fact

事实
Meaning
A thing that is known or proved to be true
Example
It is a fact that the Earth orbits the Sun.
地球绕太阳转，这是一个事实。
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。
B1 noun faʊnˈdeɪʃən

foundation

基础
Meaning
The lowest load-bearing part of a building, typically below ground level.
Example
The foundation of the building was laid with strong materials.
建筑物的基础是用坚固的材料铺设的。
C1 adjective /fɪkˈtɪʃəs/

fictitious

虚构的, 假的
Meaning
not real or true; imaginary or fabricated
Example
The story he told was entirely fictitious.
他讲的故事完全是虚构的。
C1 adverb /ˈfɪksɪdli/

Fixedly

专心地
Meaning
in a steady, unmoving manner; with intense concentration
Example
He stared fixedly at the painting.
他专心地盯着画作。
B2 adjective /ˈfʌŋkʃənl/

functional

功能性
Meaning
designed to be practical and useful, rather than just decorative
Example
The design of the chair is simple but highly functional.
椅子的设计简单，但非常实用。
A1 adjective /fɜːrst/

first

第一
Meaning
coming before all others in time, order, or importance
Example
She was the first to arrive at the meeting.
她是第一个到达会议的人。
B2 noun /ˈfɒsɪl/

fossil

化石
Meaning
the remains or impression of a prehistoric plant or animal embedded in rock
Example
The fossil of a dinosaur was discovered in the mountains.
在山中发现了一只恐龙化石。
C2 verb /ˌfɔːrˈrʌn/

forerun

预示
Meaning
To go before; to precede in time, place, or action.
Example
Dark clouds often forerun a storm.
乌云常常预示着暴风雨。
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。
A1 verb /flaɪ/

fly

飞行
Meaning
to move through the air using wings or in an aircraft
Example
Birds fly south for the winter.
鸟类冬天飞往南方。
C2 noun /fəˈlɪsɪti/

felicity

幸福
Meaning
intense happiness; the ability to find appropriate expression for one's thoughts
Example
She was known for her felicity in conversation and cheerful nature.
她因在对话中的幸福和开朗的性格而闻名。
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。
B2 noun /faɪˈnæn.ʃəl rɪˌspɒn.sɪˈbɪl.ə.ti/

financial responsibility

财务责任
Meaning
The practice of managing money and other financial resources in a responsible and effective manner.
Example
Financial responsibility ensures long-term economic stability.
财务责任确保长期的经济稳定。
A2 adjective /ˈfɪnɪʃt/

finished

完成, 结束
Meaning
completed or brought to an end
Example
The painting is finished and ready to display.
这幅画已经完成，准备展示。
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 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。
A1 adjective /fɑːst/

Fast

快速; 急速
Meaning
moving or happening quickly; rapid; swift
Example
She runs very fast in the morning.
她早上跑得非常快。
C2 noun /ˈflætʃələns/

flatulence

消化系统中的气体积聚
Meaning
the accumulation of gas in the digestive system; excessive gas in the stomach or intestines
Example
Eating beans can sometimes cause flatulence.
吃豆子有时会引起腹胀。
B1 adverb /ˈfeər.li/

Fairly

公正地; 适度地; 合理地
Meaning
in a just manner; moderately; reasonably
Example
The test was fairly easy, but some questions were challenging.
测试相当简单，但一些问题具有挑战性。
B2 adjective /ˈfɔːrtʃənət/

fortunate

幸运的
Meaning
Having good luck or receiving something desirable by chance.
Example
She was fortunate to escape the accident without injuries.
她很幸运没有在事故中受伤。
A2 verb /fɪks/

fix

Meaning
To repair or make something work again.
Example
The mechanic fixed the broken car.
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 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。
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。
C1 noun /ˌfɜːrmənˈteɪʃən/

fermentation

发酵，酵母或细菌的化学变化
Meaning
a chemical process by which substances like sugar are converted into alcohol or acids using microorganisms
Example
The fermentation of grapes produces wine.
葡萄的发酵产生葡萄酒。
C1 verb /ˈfɪdʒɪt/

fidget

坐立不安，焦虑不安
Meaning
to make small movements, especially because of nervousness or impatience
Example
The child began to fidget during the long lecture.
孩子在漫长的讲座中开始不停地动。
C2 noun /ˈfrɛʃɪt/

freshet

突然的河流泛滥
Meaning
A sudden overflow of a stream or river caused by heavy rain or melting snow.
Example
After the storm, the river turned into a raging freshet.
暴风雨过后，河流变成了猛烈的freshet。
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。
C2 adjective /ˈflæs.ɪd/

Flaccid

软弱的; 无力的; 松弛的;
Meaning
soft and limp; lacking firmness; drooping
Example
The plant's leaves became flaccid after days without water.
在没有水的几天后，植物的叶子变得软弱无力。
C1 noun ˌfɜːr.tɪ.laɪˈzeɪ.ʃən

fertilization

施肥
Meaning
The process of adding nutrients to soil to increase crop productivity.
Example
Organic fertilization enhances soil health.
有机施肥有助于改善土壤健康。
B2 noun /ˌfæs.ɪˈneɪ.ʃən/

Fascination

迷恋; 吸引; 吸引力
Meaning
the power to fascinate someone; the state of being intensely interested
Example
Her fascination with ancient history led her to become an archaeologist.
她对古代历史的迷恋让她成为了一名考古学家。
C1 verb /ˈfɜːrmɛnt/

ferment

经历一个化学过程，其中糖分转化为酒精或酸; 激起或引发变化
Meaning
to undergo a chemical process where sugars are converted to alcohol or acid; to incite or stir up change
Example
The grapes are left to ferment for several weeks.
葡萄被留下来发酵几个星期。