flummoxed
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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。
C1 adjective /ˈfɑːð.ər.ləs/

fatherless

没有父亲
Meaning
without a father
Example
The fatherless child relied on the support of his community.
这个没有父亲的孩子依赖于他社区的支持。
A1 noun /fʊt/

Foot

脚
Meaning
the lower extremity of the leg that is in direct contact with the ground in standing or walking
Example
She hurt her foot while running.
她在跑步时扭伤了脚。
A2 number /ˈfɪfti/

fifty

五十
Meaning
the number 50
Example
The stadium can hold fifty thousand people.
体育场可以容纳五万人。
C1 verb /fɔːrˈtɛl/

foretell

预言
Meaning
to predict or announce something before it happens
Example
The old man claimed he could foretell the future.
那位老人声称他能够预言未来。
C1 noun fluˈɪd.ɪ.ti

fluidity

流动性
Meaning
The ability of a substance to flow easily; smooth and graceful movement or style.
Example
The fluidity of the dancer's movements was mesmerizing.
舞者动作的流动性令人着迷。
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 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 verb /ˈfɒn.dəl/

fondle

抚摸
Meaning
To stroke or caress lovingly or gently.
Example
She fondled the kitten gently in her lap.
她轻柔地抚摸着她膝盖上的小猫。
B2 noun /fleɪm/

Flame

火焰
Meaning
a hot glowing body of ignited gas that is generated by something on fire
Example
The candle flame flickered gently in the evening breeze.
蜡烛的火焰在晚风中微微闪烁。
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 noun /friːz/

frieze

浮雕带
Meaning
a decorative horizontal band, often sculpted or painted, usually on a wall near the ceiling
Example
The frieze above the entrance depicts scenes from ancient mythology.
入口上方的浮雕带描绘了古代神话中的场景。
A1 noun /ˈfriː taɪm/

free time

空闲时间
Meaning
time when a person is not working or occupied and can do activities they enjoy
Example
She likes to read books in her free time.
她喜欢在空闲时间读书。
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。
B2 noun /ˈfjuːʒən/

fusion

融合
Meaning
the process or result of joining two or more things together to form a single entity
Example
The restaurant offers a unique fusion of Asian and European cuisines.
餐厅提供独特的亚洲和欧洲美食融合。
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。
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。
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。
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。
C2 noun /ˈfuːləri/

foolery

愚蠢
Meaning
Silly or foolish behavior or actions.
Example
His constant foolery made the meeting hard to take seriously.
他不断的愚蠢让会议变得难以认真对待。
C1 noun /ˈfʌŋɡəs/

fungus

真菌
Meaning
a spore-producing organism feeding on organic matter, including molds, yeast, and mushrooms
Example
A strange fungus was growing on the old tree.
一种奇怪的真菌在老树上生长。
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 /foʊˈmɛnt/

foment

煽动
Meaning
To instigate or stir up (an undesirable or violent sentiment or course of action).
Example
The rebel leader tried to foment unrest among the people.
叛乱领袖试图在人民中煽动骚乱。
C1 verb /ˈflɪk.ər/

flicker

闪烁
Meaning
to shine unsteadily or waver between light and dark
Example
The candle flickered in the wind.
蜡烛在风中闪烁。
C2 noun /ˌfrɪdʒɪˈdɛːriəm/

frigidarium

冷水池
Meaning
a large cold pool in ancient Roman baths used for cooling off after hot baths
Example
The ruins of the Roman frigidarium are still visible today.
罗马的冷水池遗址今天仍可见。
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 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。
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 /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 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。
A1 verb /fərˈɡet/

forget

忘记
Meaning
to be unable to remember something; to fail to bring something to mind
Example
Don't forget to lock the door when you leave.
离开时不要忘记锁门。
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。
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 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。
C2 adjective /ˈfɛkləs/

feckless

无能的, 不负责任的
Meaning
lacking initiative or strength of character; irresponsible
Example
His feckless attitude at work caused several missed deadlines.
他在工作中的无能态度导致了多个错过的最后期限。
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 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。
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 noun /ˈfoʊ.li.oʊ/

folio

大书或手稿
Meaning
A sheet of paper folded once to form two leaves (four pages) of a book; also a term for a large book or manuscript.
Example
The library houses an ancient Shakespeare folio.
图书馆里有一本古老的莎士比亚大书。
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。
B1 verb /ˈfɛri/

ferry

渡船运输
Meaning
to transport by boat; to carry back and forth
Example
The boat ferried passengers across the river.
船把乘客运过了河。
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。
C1 noun fɔːlt ˈtɒl.ər.əns

fault-tolerance

容错性
Meaning
The ability of a system to continue operating properly in the event of the failure of some of its components.
Example
Fault-tolerance ensures dependable systems.
容错性确保了可靠的系统。
B1 noun /ˈfes.tə.vəl/

Festival

节日; 庆典;
Meaning
a day or period of celebration, typically for religious reasons; an organized series of concerts, films, etc.
Example
The music festival attracted thousands of visitors from around the world.
音乐节吸引了来自世界各地的成千上万的游客。
C1 noun /ˈfɔːrmən/

foreman

负责一组工人的人，特别是在工厂或建筑工地上
Meaning
a person in charge of a group of workers, especially in a factory or construction site
Example
The foreman supervised the workers on the construction site.
工头在建筑工地上监督工人。
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/verb /flɑːk/

flock

群
Meaning
a group of birds or animals; to gather or move in a crowd
Example
Tourists flocked to the beach during summer.
游客们在夏天涌向海滩。
B1 adjective /ˈfɒɡi/

foggy

有雾的
Meaning
Full of or covered with fog; unclear or hazy.
Example
The mountain road was dangerous on the foggy morning.
山区的道路在这个雾蒙蒙的早晨非常危险。
C1 noun /ˈflæn.əl/

Flannel

法兰绒
Meaning
a soft woven fabric, typically made of wool or cotton and slightly milled and raised
Example
He wore a warm flannel shirt in winter.
他在冬天穿了一件温暖的法兰绒衬衫。
C1 noun /ˈfɔːrsəm/

foursome

四人组
Meaning
a group of four people or things, especially in games or social activities
Example
The foursome enjoyed a game of golf together.
四人组一起享受了一场高尔夫比赛。
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。
B2 verb /ˈflʌrɪʃ/

flourish

Meaning
To grow or develop in a healthy or successful way.
Example
Her business began to flourish after she introduced online sales.
A2 verb /fɪl/

fill

填充
Meaning
to make or become full; to put something into a container until it is full
Example
Please fill the glass with water.
请把玻璃杯装满水。
A2 adjective /ˈflaɪɪŋ/

flying

飞行的
Meaning
able to move through the air; related to flight or aircraft
Example
The flying bird disappeared into the clouds.
那只飞行的鸟消失在云中。
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。
B1 noun /ˈfɛloʊ/

fellow

伙伴
Meaning
a person who shares a common situation, interest, or activity with another
Example
He is a fellow student in my class.
他是我班上的一个伙伴。
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。
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。
C1 verb /flaʊt/

flout

蔑视
Meaning
To openly disregard or show contempt for a rule or law.
Example
The company was fined for flouting environmental regulations.
该公司因违反环保规定而被罚款。
A2 noun /ˈfer.i.teɪl/

Fairy-tale

童话故事
Meaning
a children's story about magical and imaginary beings and lands
Example
Children love listening to fairy-tales before bedtime.
孩子们喜欢在睡觉前听童话故事。
C1 adjective /ˈfɪs.kəl/

fiscal

财政的
Meaning
Relating to government revenue, especially taxes, or public money management.
Example
The government introduced new fiscal policies to control inflation.
政府推出了新的财政政策来控制通货膨胀。
A2 noun /ˈfaɪəˌwɜːk/

firework

烟花
Meaning
a device that explodes or creates a display of lights and sounds, often used in celebrations
Example
The fireworks lit up the sky during the New Year's Eve celebration.
烟花在新年夜庆祝活动中点亮了天空。
C1 noun /ˈfæs.ɪt/

facet

方面, 特点, 部分
Meaning
One of the many aspects or features of something; a particular part or element of something.
Example
Every facet of the project was carefully analyzed.
项目的每个方面都进行了仔细分析。
A2 adjective /fɪt/

Fit

合适的; 适当的; 健康的; 身体状况良好的; 准备好的
Meaning
suitable; appropriate; healthy; in good physical condition; ready
Example
He is fit and healthy.
他健康且状态良好。
C2 noun /flæks/

flax

亚麻
Meaning
a plant whose fibers are used to make linen and whose seeds are edible
Example
Flax is often used in making linen fabrics.
亚麻常用于制作亚麻织物。
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 noun/verb /fliːs/

fleece

Meaning
The woolly covering of a sheep; as a verb, to swindle or cheat someone.
Example
The farmer sheared the sheep’s fleece carefully.
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。
B1 noun /feɪθ/

Faith

信念; 信任; 宗教信仰;
Meaning
complete trust or confidence in someone or something; strong belief in religion
Example
She had unwavering faith in her team's ability to succeed.
她对她的团队成功的能力有着坚定不移的信念。
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 verb /ˈfɔːrfɪt/

forfeit

Meaning
to lose or give up something, usually as a penalty for wrongdoing
Example
He had to forfeit the match after breaking the rules.
C2 noun /ˈfɜːrnəri/

fernery

蕨类植物培育园，培养蕨类植物的地方
Meaning
a place or greenhouse where ferns are cultivated
Example
The garden's fernery was full of exotic plants.
花园的蕨类植物培育园里充满了异国植物。
C2 noun /frɒnd/

frond

叶子
Meaning
A large, divided leaf of a fern, palm, or similar plant.
Example
The fern's frond stretched gracefully over the garden path.
蕨类植物的叶片优雅地伸展在花园小路上。
B2 noun /fliːt/

fleet

舰队
Meaning
a group of ships, vehicles, or aircraft operating together under one command
Example
The navy deployed its entire fleet for the exercise.
海军为演习部署了整个舰队。
A2 adjective, noun /ˈfeɪvərɪt/

favorite

最喜欢的
Meaning
Preferred over all others; something or someone especially liked.
Example
Chocolate is my favorite ice cream flavor.
巧克力是我最喜欢的冰淇淋口味。
B2 noun /ˈfrɪkʃən/

friction

摩擦
Meaning
the resistance that one surface or object encounters when moving over another; conflict or tension between people or groups
Example
There was friction between the two departments over resource allocation.
在资源分配问题上，两个部门之间有摩擦。
B2 noun /flɔː/

flaw

缺陷
Meaning
a defect or imperfection in something
Example
The diamond had a small flaw that was barely visible.
钻石有一个几乎看不见的小缺陷。
A2 noun /fraɪd raɪs/

Fried rice

炒饭
Meaning
a dish of cooked rice that has been stir-fried in a wok or frying pan
Example
We ordered chicken fried rice from the Chinese restaurant.
我们从中国餐馆订了鸡肉炒饭。
A2 adjective /flæt/

flat

平坦
Meaning
Smooth and level, without raised areas or curves.
Example
The road ahead was completely flat.
前方的路完全是平坦的。
C1 noun /ˈfoʊliɪdʒ/

foliage

树叶
Meaning
The leaves of a plant, collectively.
Example
The autumn foliage looked stunning in the park.
秋天的树叶在公园里看起来很惊艳。
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 /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 /ˈfeɪtl/

fatal

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。
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。
C1 adjective /ˈfænsiːd/

fancied

想象的, 渴望的
Meaning
imagined, desired, or believed without evidence
Example
He is a fancied suitor in the eyes of the young lady.
他是年轻女士眼中的一位想象中的追求者。
A2 noun /fæt/

Fat

脂肪
Meaning
a natural oily substance occurring in animal bodies; lipid used in cooking
Example
Too much fat in your diet can be unhealthy.
你饮食中脂肪过多可能对健康有害。
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 /ˈfaɪ.bər/

fibre

纤维
Meaning
A thread or filament from which a vegetable tissue, mineral substance, or textile is formed; dietary material that aids digestion.
Example
Eating foods rich in fibre can improve your digestion.
食用富含纤维的食物可以改善消化。
C2 adjective /fəˈsiːʃəs/

facetious

讽刺的
Meaning
Treating serious issues with deliberately inappropriate humor
Example
He was being facetious when he said he wanted to live on the moon.
他说他想住在月球上时，他是在开玩笑。
B1 adjective /faɪˈnænʃəl/

financial

金融的
Meaning
relating to money, banking, or finance
Example
He made a sound financial decision by investing wisely.
他通过明智的投资做出了稳健的金融决策。
C2 adjective /ˈflæb.i/

Flabby

松软且松弛; 缺乏紧实或肌肉张力; 虚弱
Meaning
soft and loose; lacking firmness or muscle tone; weak
Example
His flabby arms showed he needed to exercise more.
他松弛的手臂显示他需要更多的锻炼。
B2 adverb /ˈfræŋkli/

Frankly

坦率地说; 直言不讳;
Meaning
honestly; openly; in a direct manner
Example
Frankly, I think this plan needs more consideration.
坦率地说，我认为这个计划需要更多的考虑。
C2 noun /fɪntʃ/

finch

雀鸟（小型歌唱鸟）
Meaning
a small songbird with a short, stout bill
Example
A colorful finch perched on the branch singing sweetly.
一只五彩斑斓的雀鸟栖息在树枝上，甜美地唱着歌。
B2 noun /ˈfaɪbər/

fiber

纤维
Meaning
a thread or filament from which a textile is formed; dietary substance from plants that aids digestion
Example
Fruits and vegetables are high in fiber.
水果和蔬菜富含纤维。
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 noun /fæd/

fad

短暂流行的时尚，趋势
Meaning
a temporary fashion or trend; a short-lived craze
Example
The new diet became a popular fad among teenagers.
新的饮食成了青少年中的短暂流行趋势。
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。
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。
B2 noun /ˈfeɪbəl/

fable

寓言
Meaning
a short story, typically featuring animals as characters, that conveys a moral lesson
Example
Aesop’s fables are famous for teaching valuable lessons through simple stories.
伊索的寓言通过简单的故事传授宝贵的教训。
C2 adjective /ˈflaɪti/

flighty

不稳定
Meaning
unstable, impulsive, or easily distracted; lacking seriousness or stability
Example
She’s too flighty to stick with one job for long.
她太不稳定了，无法在一份工作上呆太长时间。
C1 noun, verb /ˈfɛrɪt/

ferret

雪貂, 坚持不懈地寻找或发现某物
Meaning
a small domesticated animal used for hunting; to search or uncover something persistently
Example
He ferreted out the hidden documents.
他发现了隐藏的文件。
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。
B2 verb /ˈfɪltər/

filter

过滤
Meaning
to pass a substance through a device to remove unwanted material or to selectively pass certain items
Example
She used a coffee filter to separate the grounds from the liquid.
她用咖啡过滤器将咖啡渣和液体分开。
C1 noun /frəˈdʒɪl.ɪ.ti/

fragility

脆弱性
Meaning
The quality of being fragile; delicateness.
Example
The cornea's fragility increases with rubbing.
角膜的脆弱性随着摩擦而增加。
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。
C2 verb /fɔːrˈfɛnd/

forfend

保护, 防卫, 避免
Meaning
to protect or defend against something undesirable; to prevent
Example
May good fortune forfend any danger from our journey.
愿好运保护我们，避免任何危险。
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 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。
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。
C2 noun ˌfjuːmɪˈɡeɪʃən

fumigation

熏蒸
Meaning
The practice of disinfecting or purifying an area using gas or smoke.
Example
Fumigation is an effective method to control pest infestations.
熏蒸是一种有效的控制害虫侵扰的方法。
C2 noun /fləˈtɪlə/

flotilla

小型舰队
Meaning
A small fleet of ships or boats operating together.
Example
A flotilla of fishing boats left the harbor at dawn.
一支渔船的舰队在黎明时分离开港口。
B2 verb /ˈfæs.ɪ.neɪt/

fascinate

迷住
Meaning
to attract and hold the attention of someone; to charm or captivate
Example
The magician's performance fascinated the audience.
魔术师的表演吸引了观众。
C2 noun /ˈfɔːltˌfaɪndər/

faultfinder

找茬者
Meaning
a person who habitually finds fault with others
Example
He is such a faultfinder that nothing anyone does is ever good enough.
他是一个找茬者，任何人做的事情都永远不够好。
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。
A2 adjective /frɛʃ/

fresh

新鲜
Meaning
new, recently made, or clean and pure
Example
The bread is still fresh from the oven.
面包还是刚从烤箱出来。
B1 noun /ˈfæn.si/

Fancy

幻想; 幻觉或想象
Meaning
a feeling of liking or wanting something; imagination or fantasy
Example
The child had a fancy for becoming a famous astronaut when he grew up.
孩子长大后希望成为一名著名的宇航员。
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。
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 /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。
B1 verb /fəʊld/

fold

Meaning
to bend something, especially paper or cloth, so that one part covers another
Example
She folded the letter neatly before placing it in the envelope.
B2 adjective /fəˈɡɪv.ɪŋ/

Forgiving

宽容
Meaning
ready and willing to forgive; merciful; lenient
Example
She has a forgiving nature and rarely holds grudges.
她有宽容的天性，几乎不记仇。