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C1 verb/noun ˈbuːt.stræp

bootstrap

通过使用个人资源而非外部资金启动并发展一个企业
Meaning
To start and develop a business using personal resources without external funding.
Example
He bootstrapped his company with minimal resources.
他用最小的资源启动了自己的公司。
C1 noun /ˈbɑːr.tər ˌsɪs.təm/

barter system

物物交换
Meaning
A system of exchange where goods and services are traded directly without using money.
Example
Ancient civilizations used the barter system for trade.
古代文明使用物物交换系统进行贸易。
C1 noun /ˈbenɪˌfæktər/

Benefactor

捐赠人; 慈善家; 赞助人
Meaning
a person who gives money or other help to support a person or cause; a patron
Example
The anonymous benefactor donated millions to the hospital.
匿名捐助者向医院捐赠了数百万。
C1 noun /bɜːrθ/

Berth

卧铺; 船、火车或其他交通工具上的睡觉地方
Meaning
a sleeping place in a ship, train, or other vehicle; a place where a ship can dock
Example
I booked an upper berth on the overnight train.
我在夜间列车上预订了一个上铺。
C1 verb /bɪˈsiːdʒ/

besiege

围困
Meaning
to surround a place with armed forces to capture it; to overwhelm with requests or attention
Example
The city was besieged by enemy troops.
城市被敌军包围了。
C1 adjective ˈbɜːdʒənɪŋ

burgeoning

蓬勃发展
Meaning
Beginning to grow or increase rapidly; flourishing.
Example
The burgeoning tech industry has attracted many investors.
这个蓬勃发展的技术行业吸引了许多投资者。
C1 verb /bɪˈhɛd/

behead

斩首
Meaning
to cut off a person's or animal's head; to remove the leader or most important part
Example
The historical account describes how the traitor was beheaded as punishment.
历史记载描述了叛徒作为惩罚被斩首的经过。
C1 verb /broʊtʃ/

broach

提出
Meaning
to bring up a subject for discussion
Example
She decided to broach the topic of salary with her manager.
她决定与经理讨论工资问题。
C1 noun /ˈbaɪ.laɪn/

byline

作者姓名行
Meaning
A line in a newspaper or magazine article that names the writer.
Example
Her byline appeared on the front page of the newspaper.
她的名字出现在报纸的头版。
C1 verb /bɪˈlɪtl/

belittle

贬低
Meaning
To make someone or something seem less important or less valuable.
Example
He often belittled his coworkers to feel superior.
他经常贬低同事以感到优越。
C1 adjective /bɪˈrɛft/

bereft

失落的
Meaning
Deprived of or lacking something, especially a nonmaterial asset.
Example
After the betrayal, he felt bereft of hope and trust.
背叛后，他感到失落于希望和信任。
C1 adjective /ˈbɔɪstərəs/

boisterous

喧闹
Meaning
noisy, energetic, and cheerful; rowdy
Example
The children were boisterous during the birthday party.
孩子们在生日派对上很喧闹。
C1 adjective /ˈbleɪmləs/

blameless

无辜
Meaning
innocent of wrongdoing; not deserving blame
Example
She remained calm and blameless throughout the investigation.
她在整个调查过程中保持冷静和无辜。
C1 adjective /ˈbɛndi/

bendy

柔韧的
Meaning
Easily curved or flexible.
Example
The bendy straw made it easier to drink from the cup.
弯曲的吸管使得从杯子里喝水更加容易。
C1 noun /ˈboʊ.ə/

Boa

蟒蛇
Meaning
a large non-venomous snake that kills prey by constriction
Example
The boa constrictor wrapped around its prey.
波阿蛇缠绕着它的猎物。
C1 noun /beɪl/

bale

捆
Meaning
A large bundle of goods tightly wrapped and bound.
Example
The workers loaded the bale of cotton onto the truck.
工人们将棉花捆装上了卡车。
C1 noun/adjective /ˈbæstərd/

bastard

私生子
Meaning
a child born to unmarried parents (offensive); also used informally as an insult or to describe something unpleasant
Example
He called him a bastard in anger.
他生气时骂他是私生子。
C1 adjective /bɪˈmjuːzd/

bemused

困惑的，迷茫的
Meaning
confused, puzzled, or lost in thought
Example
She looked bemused when he asked the strange question.
当他问了一个奇怪的问题时，她看起来很困惑。
C1 noun /ˈbed sted/

Bed stead

床架
Meaning
the framework of a bed; a bed frame without bedding
Example
The wooden bed stead was very sturdy.
木质床架非常坚固。
C1 noun /bəˈtæljən/

battalion

营
Meaning
A large body of soldiers ready for battle, typically consisting of several companies.
Example
The battalion was deployed to the front line.
这个营被部署到前线。
C1 adjective /ˈbækˌhændɪd/

backhanded

间接或讽刺的
Meaning
Indirect or sarcastic, often appearing as praise but actually insulting.
Example
She gave him a backhanded compliment about his work.
她给了他一个间接的赞美，关于他的工作。
C1 adjective ˌbjʊə.rəˈkræt.ɪk

bureaucratic

官僚的
Meaning
Involving or characterized by complex rules and procedures that can delay the achievement of goals.
Example
Bureaucratic red tape often delays project approvals.
官僚主义的繁文缛节经常延误项目审批。
C1 noun /blæk sɔːlt/

Black Salt

黑盐
Meaning
a type of rock salt with a distinctive sulfuric flavor, commonly used in Indian cuisine
Example
Add a pinch of black salt to enhance the flavor of the fruit salad.
加入一撮黑盐以提升水果沙拉的风味。
C1 verb /ˈbɒɡəl/

boggle

使迷惑
Meaning
to overwhelm or confuse; to be astonished or puzzled by something
Example
The complexity of the puzzle boggled his mind.
这个谜题的复杂性让他的头脑感到困惑。
C1 noun /ˈblʌdˌbæθ/

bloodbath

血腥屠杀
Meaning
an event in which a lot of people are killed or injured, especially in a violent conflict
Example
The war turned into a bloody bloodbath.
战争变成了一场血腥的屠杀。
C1 adjective /ˈbaɪtɪŋ/

Biting

咬; 刺骨寒冷; 尖锐的批评
Meaning
extremely cold; sharply critical or harsh
Example
The biting cold made everyone shiver.
刺骨的寒冷让所有人都颤抖了。
C1 noun /ˈbreɪkər/

breaker

断路器（打破某物的人或物体；在岸边破碎成泡沫的大海浪；中断电路的设备）
Meaning
A person or thing that breaks something; a large sea wave that breaks into foam near the shore; a device that interrupts an electric circuit.
Example
The breaker tripped during the storm, cutting off electricity.
暴风雨期间，断路器跳闸，切断了电力。
C1 verb /bæsk/

bask

晒太阳
Meaning
to lie in warmth and light; to enjoy something pleasurable
Example
The cat basks in the sunny window.
猫在阳光明媚的窗台上晒太阳。
C1 noun /brəˈzɪər/

Brassiere

胸罩
Meaning
a woman's undergarment designed to support the breasts
Example
She bought a comfortable brassiere for daily wear.
她买了一件舒适的胸罩，适合日常穿着。
C1 adjective /ˈbɔɪənt/ or /ˈbuːjənt/

buoyant

漂浮的，愉快的
Meaning
Able to float easily; cheerful and optimistic.
Example
She remained buoyant despite the difficulties.
她在困难面前依然保持乐观。
C1 noun /bɑːrb/

barb

刺, 尖锐的评论
Meaning
a sharp projection such as on a fishhook; a cutting remark
Example
The fishhook has a small barb to keep the fish from escaping.
鱼钩上有一个小刺，以防止鱼逃脱。
C1 noun /brɔːl/

brawl

争吵
Meaning
a noisy fight in a public place
Example
A brawl broke out outside the bar late at night.
夜晚在酒吧外发生了争吵。
C1 noun /ˈbraɪ.dəl/

Bridle

缰绳; 马笼头
Meaning
the headgear used to control a horse, consisting of buckled straps and a bit
Example
The rider adjusted the horse's bridle before mounting for the race.
骑手在上马前调整了马的缰绳。
C1 noun /bɒmˈbɑːrdmənt/

bombardment

轰炸
Meaning
a continuous attack with bombs or other projectiles
Example
The city endured a heavy bombardment during the war.
这座城市在战争期间承受了猛烈的轰炸。
C1 adjective /bɪˈleɪtɪd/

belated

迟到的
Meaning
coming or happening later than expected or usual
Example
She sent me a belated birthday card.
她寄给我一张迟到的生日卡。
C1 verb /blæntʃ/

blanch

变得苍白
Meaning
to turn pale from shock, fear, or to briefly boil food to remove skin or prepare it
Example
She blanched at the sight of blood.
她看到血后吓得脸色苍白。
C1 noun /ˈbærɪˌtoʊn/

baritone

低沉的男声
Meaning
a male singing voice between tenor and bass
Example
The singer’s baritone voice impressed the audience.
歌手的男中音给观众留下了深刻印象。
C1 verb /ˈbɛkən/

beckon

招手示意
Meaning
to signal or call someone to come closer, often with a gesture; to attract or invite
Example
She beckoned him to come closer with a wave of her hand.
她挥手示意他走近一些。
C1 noun/verb /brʊk/

brook

小溪 / 容忍
Meaning
As a noun: a small natural stream; As a verb: to tolerate or endure something
Example
The village was built near a clear brook.
这个村庄建在一条清澈的小溪旁。
C1 noun /ˈblæs.fə.mi/

blasphemy

亵渎
Meaning
the act of speaking disrespectfully about God or sacred things
Example
In some countries, blasphemy is a punishable offense.
在某些国家，亵渎是可受处罚的罪行。
C1 noun/adjective /ˈbaɪ.ɡɒn/

bygone

过去的
Meaning
Something belonging to an earlier time; past and no longer existing.
Example
He often talks about the traditions of bygone days.
他经常谈论过去时代的传统。
C1 preposition /ˈbɑːrɪŋ/

barring

除非，除了
Meaning
except for; if not for
Example
Barring a miracle, the team will not win the championship.
除非有奇迹发生，否则团队将无法赢得冠军。
C1 verb /bɪˈɡɛt/

beget

导致 / 产生
Meaning
to bring about or give rise to; to father or produce
Example
Violence begets more violence.
暴力会引发更多的暴力。
C1 noun /ˈbɔɪənsi/ or /ˈbuːjənsi/

buoyancy

浮力, 快乐
Meaning
The ability to float in a liquid; cheerfulness and optimism.
Example
Her natural buoyancy lifted the mood of the group.
她自然的快乐提升了小组的氛围。
C1 noun /ˌbɪbliˈɒɡrəfi/

bibliography

参考书目
Meaning
a list of books, articles, or other sources used or referred to in scholarly work
Example
The report includes a detailed bibliography at the end.
报告在最后包括了详细的参考书目。
C1 noun /bəˈrɒmɪtər/

barometer

气压计
Meaning
an instrument that measures atmospheric pressure
Example
The barometer indicated a storm was approaching.
气压计显示暴风雨即将来临。
C1 verb /ˈbæfəl/

baffle

困惑
Meaning
to confuse; to be too difficult to understand
Example
The math problem baffles me completely.
数学问题完全把我搞糊涂了。
C1 verb bɪˈkwiːð

bequeath

遗赠
Meaning
Leave something to someone in a will; pass down or hand down to the next generation.
Example
The scientist bequeathed his research papers to the university.
科学家把他的研究论文遗赠给了大学。
C1 noun /blaɪt/

blight

枯萎病
Meaning
A disease or condition that causes plants to wither; something that spoils or damages.
Example
The drought was a blight on the farmer’s crops.
干旱是农民作物的枯萎病。
C1 adjective /ˈboʊɡəs/

bogus

伪造的
Meaning
false, fake, or not genuine
Example
The police arrested him for using a bogus ID card.
警方因他使用伪造的身份证而逮捕了他。
C1 adjective /ˈbloʊtɪd/

bloated

膨胀的
Meaning
swollen or puffed up, often unpleasantly
Example
After the big meal, he felt bloated and uncomfortable.
吃完大餐后，他感到肚子膨胀不适。
C1 adjective /ˈbɑːmi/

balmy

温和而愉快的温暖；舒缓。
Meaning
Mild and pleasantly warm; soothing.
Example
We enjoyed a walk on a balmy summer evening.
我们在一个温和的夏日晚间散步。
C1 verb /ˈbædʒər/

badger

烦扰, 打扰
Meaning
To repeatedly ask or annoy someone with demands or questions.
Example
The reporter kept badgering the politician with questions.
记者不断用问题打扰政治人物。
C1 noun /blæk plʌm/

Black plum

黑李子
Meaning
a dark purple or black colored edible fruit with sweet and sour taste
Example
I picked some fresh black plums from the tree in our backyard.
我从我们后院的树上摘了几颗新鲜的黑李子。
C1 noun /ˈbʊzəm/

bosom

胸部
Meaning
the human chest, especially a woman’s breast; also used metaphorically to refer to closeness or intimacy
Example
She kept the secret close to her bosom.
她把秘密藏在胸口。
C1 adjective /ˈbleɪtənt/

blatant

明显的
Meaning
done openly and unashamedly; obvious and offensive
Example
The company's blatant disregard for safety regulations angered the public.
公司对安全规定的公然蔑视激怒了公众。
C1 noun /brɪˈɡeɪd/

brigade

消防队
Meaning
A large group of people organized for a specific purpose, especially a military unit.
Example
The fire brigade arrived quickly to put out the flames.
消防队迅速赶来扑灭火焰。
C1 noun /ˈbɪɡ.ət/

bigot

偏执者
Meaning
A person who is intolerant toward those holding different opinions or beliefs.
Example
He was called a bigot for refusing to listen to others' views.
因为拒绝听取他人的观点，他被称为偏执者。
C1 noun /bɪˈtreɪər/

Betrayer

背叛者; 不忠者
Meaning
a person who betrays someone or something; one who is disloyal
Example
The betrayer was exposed and faced severe consequences.
背叛者被曝光并面临严重后果。
C1 noun /blɜːrb/

blurb

宣传描述
Meaning
a short promotional description of a book, product, or service
Example
The back cover had a blurb praising the novel.
封底有一段宣传描述，赞扬这本小说。
C1 noun/verb /ˈbæntər/

banter

打趣
Meaning
playful and friendly exchange of teasing remarks
Example
The colleagues enjoyed some light banter during the meeting.
同事们在会议期间享受了一些轻松的班特。
C1 noun /baɪl/

Bile

胆汁
Meaning
a bitter greenish-brown alkaline fluid that aids digestion and is secreted by the liver and stored in the gallbladder
Example
The liver produces bile to help digest fats.
肝脏产生胆汁来帮助消化脂肪。
C1 noun /ˈbɪtər ɡɔːrd/

Bitter Gourd

苦瓜
Meaning
a green, bumpy vegetable with a very bitter taste, known for its medicinal properties
Example
Bitter gourd is excellent for controlling blood sugar levels.
苦瓜对于控制血糖水平非常有效。
C1 noun /ˈbɪɡətri/

bigotry

偏执
Meaning
Intolerance toward those who hold different opinions or lifestyles.
Example
Her bigotry prevented her from accepting people with different beliefs.
她的偏执阻止她接受拥有不同信仰的人。
C1 noun/verb /ˈbɔɪ/ or /ˈbuːi/

buoy

浮标, 保持漂浮
Meaning
A floating marker on water; to keep something afloat or encourage someone.
Example
The news buoyed their spirits after the loss.
新闻在失落后提升了他们的精神。
C1 noun /bəˈbuːn/

Baboon

狒狒
Meaning
a large African and Arabian primate with a dog-like snout and colorful buttocks
Example
The baboon troop gathered around the watering hole in the savanna.
狒狒群聚集在大草原的水坑旁。
C1 verb /ˈbəʊl.stər/

bolster

增强
Meaning
To support or strengthen; to prop up.
Example
The new policy aims to bolster economic growth.
新政策旨在促进经济增长。
C1 verb /brɔɪl/

broil

烤
Meaning
To cook food by direct heat, usually under a grill or over a fire.
Example
She broiled the chicken until it was golden brown.
她把鸡肉烤到金黄色。
C1 noun /ˌbaɪˈlæt.ər.əl nɪˌɡəʊ.ʃiˈeɪ.ʃənz/

bilateral negotiations

双边谈判
Meaning
Negotiations or discussions between two parties, typically countries or organizations.
Example
Bilateral negotiations resolve disputes.
双边谈判解决争议。
C1 noun /ˈbjuːɡəl/

Bugle

军号
Meaning
a brass musical instrument similar to a trumpet but without valves, used especially for military calls
Example
The soldier played the bugle to signal the start of the ceremony.
士兵吹响军号以示仪式开始
C1 noun /ˈblɒk.ɪdʒ/

Blockage

阻塞
Meaning
an obstruction that makes movement or flow difficult or impossible
Example
The drain blockage caused water to overflow in the kitchen.
排水管的阻塞导致水在厨房溢出。
C1 adjective /ˈblʌdləs/

bloodless

无血
Meaning
without bloodshed; lacking violence or vitality
Example
The revolution was surprisingly bloodless.
这场革命出奇地没有流血。
C1 adjective /bəˈzɜːrk/

berserk

疯狂
Meaning
Out of control with anger or excitement; wild or frenzied.
Example
The fans went berserk when their team won the championship.
当他们的队伍赢得了冠军时，粉丝们变得疯狂。
C1 verb /ˈbɪkər/

bicker

为琐事争吵
Meaning
To argue or quarrel about trivial matters.
Example
The children began to bicker over the last piece of cake.
孩子们开始为了最后一块蛋糕而争吵。
C1 noun /ˈbaɪ.lɔː/

by-law

地方性法规
Meaning
A rule made by a company, organization, or local authority to control the actions of its members.
Example
The city council passed a new by-law regulating street vendors.
市议会通过了一项新的地方法规，规范街头小贩。
C1 adjective bəˈnev.əl.ənt

benevolent

仁慈的, 慷慨的, 友好的
Meaning
Kind, generous, showing goodwill and kindness.
Example
His benevolent nature made him beloved.
他的仁慈天性使他非常受欢迎。
C1 verb /ˈbrændɪʃ/

brandish

挥舞
Meaning
to wave or flourish something, especially a weapon, in a threatening or showy way
Example
He brandished a sword to scare off the intruders.
他挥舞着剑把入侵者吓走了。
C1 noun /ˈbænɪstər/

banister

扶手栏杆
Meaning
a railing supported by posts at the side of a staircase or balcony
Example
She held the banister tightly while going down the stairs.
她在下楼时紧紧抓住扶手栏杆。
C1 adjective/verb /ˈbæntərɪŋ/

bantering

开玩笑
Meaning
characterized by good-humored teasing or joking
Example
They had a bantering conversation at the café.
他们在咖啡馆进行了幽默的对话。
C1 adjective /ˌboʊnəˈfaɪdi/

Bonafide

真正的; 真实的; 合法的
Meaning
genuine; authentic; legitimate
Example
She is a bonafide expert in her field.
她是她领域中的真正专家。
C1 verb /bruːd/

brood

Meaning
to think deeply about something that makes one unhappy; also, a group of young birds hatched at the same time
Example
He sat alone, brooding over his failures.
C1 verb /bɪˈhoʊld/

behold

看见；目睹
Meaning
to see or observe something, especially something remarkable or impressive
Example
She stood quietly to behold the sunrise over the hills.
她静静地站着，目睹山上的日出。
C1 noun /beɪl/

bail

保释
Meaning
the temporary release of an accused person awaiting trial, often with a financial guarantee
Example
He was granted bail after his arrest.
他在被捕后获得了保释。
C1 noun /bɒɡ/

bog

沼泽
Meaning
an area of wet, spongy ground; a swamp or marsh
Example
The hikers got stuck in a bog.
徒步旅行者陷入了一个沼泽。
C1 noun /ˈbæləd/

ballad

叙事歌曲
Meaning
a narrative song or poem, often sentimental or romantic
Example
The singer performed a moving ballad about lost love.
歌手演唱了一首感人的失恋歌曲。
C1 noun /baʊt/

Bout

比赛; 回合; 时期;
Meaning
a short period of intense activity of a specified kind; a wrestling or boxing match
Example
After a bout of illness, she finally recovered and returned to work.
经过一段病痛后，她终于恢复并重返工作。
C1 noun, verb /buːz/

booze

酒
Meaning
alcoholic drink, especially strong liquor; to drink alcohol, often excessively
Example
They bought some booze for the party.
他们为派对买了酒。
C1 adjective /ˈbær.ən/

Barren

荒芜的; 不毛的; 无生气的; 不生产的
Meaning
sterile; unable to produce; desolate; unproductive
Example
The barren desert stretched for miles without any vegetation.
荒凉的沙漠延伸了几英里，没有任何植被。
C1 noun /bɪz/

Biz

生意
Meaning
business (informal); commercial enterprise or activity
Example
He's been in the restaurant biz for twenty years.
他已经在餐饮生意中工作了二十年。
C1 verb /bɪˈriːv/

bereave

失去亲人
Meaning
to deprive someone of a loved one through death
Example
She was bereaved of her husband last year.
她去年失去了她的丈夫。
C1 noun /ˈbeɪlɪf/

bailiff

法警
Meaning
An official who keeps order in a court, carries out court orders, or collects debts.
Example
The bailiff asked everyone to rise as the judge entered the courtroom.
当法官进入法庭时，法警要求大家起立。
C1 noun /bʌm/

bum

臀部
Meaning
informal term for the buttocks; also a homeless or lazy person
Example
He sat on his bum all day doing nothing.
他整天坐在臀部上什么都不做。
C1 adjective /ˈbreɪzən/

brazen

Meaning
Bold and without shame; shameless.
Example
She made a brazen attempt to lie in front of everyone.
C1 adjective /bɪˈnaɪn/

benign

Meaning
Gentle, kind, or not harmful (especially of a disease or tumor).
Example
The doctor assured her that the tumor was benign.
C1 noun /ˈbʌrə, ˈbʊrə/

borough

区
Meaning
A town, district, or administrative division, especially one with its own local government.
Example
Brooklyn is a borough of New York City.
布鲁克林是纽约市的一个区。
C1 noun /bɑːm/

balm

香膏
Meaning
A soothing ointment or something that provides comfort or relief.
Example
The balm helped relieve the pain from her sunburn.
香膏帮助缓解她的晒伤疼痛。
C1 adjective /ˈbæʃ.fəl/

Bashful

害羞的; 胆小的; 谦虚的; 容易尴尬
Meaning
shy; timid; modest; easily embarrassed
Example
The bashful child hid behind her mother when meeting strangers.
那个害羞的孩子在遇到陌生人时躲在她妈妈后面。
C1 verb /bɪˈɡrʌdʒ/

begrudge

嫉妒某人拥有某物 / 勉强给予
Meaning
to resent someone for having something; to give reluctantly
Example
She did not begrudge him his success.
她没有对他的成功感到嫉妒。
C1 noun /ˈbeɪ.zəl siːdz/

Basil Seeds

罗勒种子
Meaning
small black seeds from the basil plant, often used in drinks and desserts
Example
I added basil seeds to my lemonade for a refreshing drink.
我在柠檬水中加入了罗勒种子，制作了一种清爽的饮品。
C1 noun, verb /bʌldʒ/

bulge

Meaning
A swelling or protruding part; to swell outward or protrude.
Example
The bag began to bulge with too many books inside.
C1 verb /ˈbʌŋɡəl/

bungle

搞砸
Meaning
To carry out a task clumsily or incompetently.
Example
He bungled the presentation and confused the audience.
他搞砸了演示并让观众感到困惑。
C1 noun /ˈbɛd.rɒk/

bedrock

基础
Meaning
the solid rock layer beneath the soil; the fundamental basis of something
Example
Trust is the bedrock of a healthy relationship.
信任是健康关系的基础。
C1 adjective /ˈbrɪtl/

brittle

脆弱
Meaning
easily broken or cracked; hard but liable to break
Example
The glass was so brittle that it cracked easily.
玻璃太脆弱，容易破裂。
C1 verb /bʌdʒ/

budge

Meaning
To move slightly; to change one’s opinion or position.
Example
Despite the pressure, he refused to budge from his decision.
C1 noun /bəˈtɒn/

baton

Meaning
A thin stick carried by a conductor to direct an orchestra, or used as a symbol of authority.
Example
The conductor raised his baton to begin the symphony.
C1 adjective /bɪˈfɪt.ɪŋ/

Befitting

合适的; 适合的; 对于特定情况或人适当
Meaning
appropriate; suitable; proper for a particular situation or person
Example
He wore formal attire befitting the important occasion.
他穿了适合重要场合的正式服装。
C1 phrase ˌbaɪ.oʊ.daɪˈvɜː.sɪ.ti ˌprez.əˈveɪ.ʃən

biodiversity preservation

生物多样性保护
Meaning
The protection and conservation of the variety of life in all its forms, including different species, genetic diversity, and ecosystems.
Example
Biodiversity preservation is critical for ecological balance.
生物多样性保护对生态平衡至关重要。
C1 noun /bəˈnæn.zə/

Bonanza

一种突然增加财富、好运或利润的情况或事件
Meaning
a situation or event that creates a sudden increase in wealth, good fortune, or profits
Example
The oil discovery was a bonanza for the small country.
石油的发现对这个小国来说是一个博南萨。
C1 verb /blɜːrt/

blurt

突然说出
Meaning
to say something suddenly without thinking
Example
He blurts out the secret accidentally.
他不小心说出了秘密。
C1 noun /ˈbɛərnəs/

bareness

赤裸
Meaning
the state of being bare or uncovered; lack of decoration, warmth, or concealment
Example
The bareness of the room made it feel cold and unwelcoming.
房间的赤裸感让人觉得寒冷而不友好。
C1 noun /beɪn/

bane

祸根
Meaning
A cause of great distress, harm, or annoyance.
Example
Traffic jams are the bane of city life.
交通堵塞是城市生活的祸根。
C1 noun /bɑːrˈbeəriən/

Barbarian

野蛮人; 未开化者;
Meaning
a person from an uncivilized group; someone who is cruel or brutal
Example
The ancient Romans considered anyone outside their empire to be barbarians.
古罗马人认为所有在他们帝国之外的人都是野蛮人。
C1 adjective /ˈbʊkɪʃ/

Bookish

爱读书的; 学术的
Meaning
studious; scholarly; devoted to reading and studying
Example
She was known for her bookish nature and love of literature.
她以书本亲和的天性和对文学的热爱而闻名。
C1 noun /ˈbʊl.ək/

Bullock

牛犊
Meaning
a young bull; a castrated bull used for farm work
Example
The farmer used a bullock to plow the field.
农民用牛犊来耕地。
C1 verb /bɪˈwɪldər/

bewilder

使困惑
Meaning
to cause someone to be confused or puzzled
Example
The complex instructions bewildered the students.
复杂的指令使学生感到困惑。
C1 noun /blɒˈkeɪd/

Blockade

封锁
Meaning
an act or means of sealing off a place to prevent goods or people from entering or leaving
Example
The naval blockade prevented supplies from reaching the port.
海军封锁阻止了物资到达港口。
C1 noun /bruːˈtæləti/

brutality

残暴
Meaning
extreme cruelty or violence; savage or inhumane treatment
Example
The brutality of the attack shocked the entire community.
这次攻击的残暴震惊了整个社区。
C1 noun /brɒŋˈkaɪtɪs/

bronchitis

支气管炎
Meaning
inflammation of the lining of the bronchial tubes, which carry air to and from the lungs
Example
The doctor diagnosed him with acute bronchitis.
医生诊断他患有急性支气管炎。
C1 verb /bɪˈstoʊ/

bestow

授予
Meaning
To give or present something as a gift or honor.
Example
The king bestowed honors upon the brave soldiers.
国王授予勇敢的士兵荣誉。
C1 verb /ˈblækən/

blacken

使变黑
Meaning
to make something black or darker; to stain, soil, or tarnish
Example
Smoke from the fire began to blacken the walls.
火灾的烟开始把墙壁熏黑了。
C1 verb /bɔːl/

bawl

大声哭泣
Meaning
to shout or cry loudly
Example
The baby bawled all night, keeping everyone awake.
宝宝整晚哭个不停，吵醒了所有人。