brighten
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B2 verb /ˈbraɪtən/

brighten

使明亮
Meaning
to make something lighter or more colorful; to improve mood or make happier
Example
A few kind words can brighten someone's day.
几句善意的话可以让人的一天变得明亮。
A1 adjective /ˈbɔːrɪŋ/

boring

无聊
Meaning
not interesting or exciting; dull.
Example
The lecture was so boring that several students fell asleep.
这场讲座无聊到让几个学生都睡着了。
B2 noun /beɪ/

Bay

海湾
Meaning
a broad inlet of the sea where the land curves inward
Example
The boats are anchored in the bay.
船只停泊在海湾。
C2 noun /biˈætɪtjuːd/

beatitude

至高的祝福或幸福，常用于指耶稣在山上宝训中的教义
Meaning
supreme blessedness or happiness, often used in reference to the sayings of Jesus in the Sermon on the Mount
Example
She felt a state of beatitude after receiving the good news.
收到好消息后，她感到一种祝福的状态。
C2 noun /bəˈsuːn/

bassoon

一种大号木管乐器
Meaning
a large woodwind instrument with a deep sound
Example
The orchestra featured a beautiful bassoon solo.
乐团演奏了美妙的巴松独奏。
B2 verb /briːd/

breed

繁殖, 养育
Meaning
to produce young animals; to reproduce; to keep animals for producing young
Example
They breed horses on their farm.
他们在他们的农场上繁殖马。
C2 adjective /baɪˈkæmərəl/

bicameral

两院制
Meaning
Having two branches or chambers, especially in a legislature.
Example
The United States has a bicameral legislature consisting of the Senate and the House of Representatives.
美国有一个两院制的立法机构，由参议院和众议院组成。
B2 verb /breɪd/

braid

编织
Meaning
to weave together strands of hair or material
Example
She braided her hair before going to school.
她在去学校之前编了头发。
B2 noun /buːˈtiːk/

boutique

时尚店
Meaning
a small shop that sells fashionable clothes or accessories
Example
She bought a beautiful dress from a boutique downtown.
她在市中心的时尚店里买了一件漂亮的裙子。
B1 adverb /ˈbreɪv.li/

Bravely

勇敢地
Meaning
in a way that shows courage and determination
Example
The firefighter bravely entered the burning building.
消防员勇敢地进入燃烧的建筑物。
B1 verb /baʊns/

bounce

反弹
Meaning
to spring back after hitting something; to rebound.
Example
The ball bounced off the wall and hit the window.
球投在墙上反弹，然后打到窗户。
A2 verb /blɒk/

block

阻止
Meaning
to obstruct; to prevent passage or progress
Example
The fallen tree blocks the road.
掉落的树挡住了路。
B2 noun /brum/

Broom

扫帚
Meaning
a long-handled brush of bristles or twigs, used for sweeping
Example
She used an old broom to sweep the fallen leaves from the porch.
她用一把旧扫帚清扫从门廊掉落的树叶。
A2 noun /bɜːrθ/

Birth

出生; 起源; 开端;
Meaning
the emergence of a baby or young from the body of its mother; the beginning or origin of something
Example
The birth of their first child was a joyful moment.
他们第一个孩子的出生是一个喜悦的时刻。
A1 noun /bɒks/

Box

盒子
Meaning
a container with flat sides and a lid, used for storing or carrying things
Example
She put her toys in the wooden box.
她把玩具放进木盒里。
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。
C2 noun /ˈbrɪmˌstoʊn/

brimstone

Meaning
Sulfur, especially when considered as fiery and associated with hell or divine punishment.
Example
The preacher spoke of fire and brimstone to warn the congregation.
C2 verb /bɪˈtroʊð/

betroth

订婚
Meaning
To formally promise to marry someone; to engage.
Example
He was betrothed to the princess at a young age.
他在年轻时就与公主订婚了。
C2 adjective /ˈbɔːlki/

balky

固执
Meaning
difficult, uncooperative, or stubborn
Example
The balky printer refused to work when needed most.
固执的打印机在最需要的时候拒绝工作。
B1 adjective /ˈblʌdi/

bloody

血腥
Meaning
covered in, involving, or containing blood; also used informally for emphasis in British English.
Example
The soldier returned from battle with a bloody arm.
士兵带着血腥的手臂从战斗中归来。
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。
C2 adjective /ˈbʌksəm/

buxom

丰满且迷人的女性
Meaning
Plump, with a full figure and often large-breasted, especially used to describe women.
Example
The actress was described as a cheerful and buxom woman.
这位女演员被描述为一个快乐且丰满的女性。
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。
C2 noun /ˈbɜːrɡər/

burgher

城市居民 (富裕的中产阶级)
Meaning
A citizen of a town, typically a member of the wealthy middle class.
Example
The burgher was respected as a prosperous merchant in the city.
这个布尔戈被尊敬为城市中的繁荣商人。
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。
C2 noun /ˈbʌɡəˌbuː/

bugaboo

鬼怪 / 恐惧
Meaning
An object of fear or worry; an imagined cause of anxiety.
Example
The threat of inflation became a political bugaboo.
通货膨胀的威胁变成了一个政治上的恐惧。
A1 noun /breɪk/

break

休息
Meaning
A pause in work or during an activity or event.
Example
Short breaks refresh your mind.
短暂的休息可以让你的思维焕然一新。
C2 noun /ˈbæn.jən/

Banian

背心
Meaning
a sleeveless undergarment worn next to the skin; vest
Example
He put on a cotton banian under his shirt.
他穿了一件棉质巴尼安在衬衫下。
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 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。
B2 noun /ˈblɒkˌtʃeɪn/

blockchain

区块链
Meaning
A system of recording information in a way that makes it difficult or impossible to change, hack, or cheat the system
Example
Blockchain technology ensures transparency in financial transactions.
区块链技术确保金融交易的透明度。
C1 adjective /ˈbreɪzən/

brazen

Meaning
Bold and without shame; shameless.
Example
She made a brazen attempt to lie in front of everyone.
C2 adjective /ˈbeɪnfəl/

baneful

有害的
Meaning
Causing harm, ruin, or destruction; deadly or poisonous.
Example
His baneful influence ruined the community.
他的有害影响摧毁了社区。
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。
C2 verb /bɪˈdræɡəl/

bedraggle

通过把东西拖过泥水或水使其湿，脏和乱
Meaning
to make something wet, dirty, and untidy by dragging it through mud or water
Example
The children came home bedraggled after playing in the rain.
孩子们在雨中玩耍后，湿漉漉脏兮兮地回家了。
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。
B2 adjective /ˌbaɪəˈlɒdʒɪkl̩/

biological

生物学的
Meaning
relating to the science of biology or to life and living organisms
Example
She is studying biological sciences at university.
她在大学学习生物科学。
C2 noun /ˈbɑːr.nɪ.kəl/

Barnacle

藤壶
Meaning
a marine crustacean that attaches itself permanently to underwater surfaces
Example
The old ship's hull was covered with barnacles.
那艘旧船的船体上布满了藤壶。
C2 noun /ˌbeɪˈliː/

bailee

受托人
Meaning
a person or party who temporarily receives possession of goods or property from another under a legal agreement
Example
The bailee must take reasonable care of the goods while they are in his possession.
受托人必须合理地保管财产。
C2 noun /bəˈkuːl/

Bakul

巴库尔花
Meaning
a fragrant white flower native to South Asia, scientifically known as Mimusops elengi
Example
The sweet fragrance of bakul flowers filled the evening air in the village.
巴库尔花的甜美香气弥漫在村庄的傍晚空气中。
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 /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。
A2 preposition /bɪˈsaɪd/

beside

在...旁边
Meaning
next to or at the side of someone or something
Example
She sat beside her best friend during the ceremony.
她在仪式期间坐在她最好的朋友旁边。
B2 noun /ˈbaɪoʊ ˌdeɪtə/

Bio-data

简历
Meaning
biographical data; a resume or curriculum vitae containing personal and professional information
Example
Please submit your bio-data along with the job application.
请将您的简历与求职申请一起提交。
B1 noun, verb /bʌz/

buzz

嗡嗡声
Meaning
to make a low continuous humming sound; a feeling of excitement or interest
Example
I could hear the phone buzz during the meeting.
开会时我听到了手机的嗡嗡声。
B2 noun /bædʒ/

badge

徽章
Meaning
A small emblem or sign worn to show membership, authority, or achievement.
Example
The police officer showed his badge to identify himself.
警察展示了他的徽章来证明自己的身份。
C2 noun /blæk biː/

Black-bee

黑蜜蜂
Meaning
a large dark-colored bee that makes a loud buzzing sound
Example
The black-bee was buzzing around the flowers in the garden.
黑蜜蜂在花园里的花丛中嗡嗡作响。
B2 noun /brest/

Breast

胸部
Meaning
the front surface of a person's or animal's body between the neck and the stomach
Example
The baby fell asleep on her mother's breast.
宝宝在母亲的胸部入睡。
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。
A2 verb /bit/

beat

打
Meaning
to strike repeatedly; to defeat; to pulsate rhythmically
Example
Our team will beat theirs in the final match.
我们的团队将在决赛中击败他们。
C2 verb /ˈblʌstər/

bluster

大声吹嘘
Meaning
to speak loudly in an aggressive or threatening way, often without real power
Example
The manager blustered about firing people but did nothing.
经理大声吹嘘解雇人，但什么也没做。
B2 noun /brɪŋk/

brink

边缘
Meaning
The edge or point just before a significant event or change.
Example
The company was on the brink of bankruptcy.
公司处于破产的边缘。
B1 adverb /bɪˈniːθ/

Beneath

下面; 底下
Meaning
under; below; underneath
Example
The treasure lies beneath the old tree.
宝藏埋在古老的树下。
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。
B1 noun /ˈbles.ɪŋ/

Blessing

祝福; 礼物;
Meaning
a beneficial thing for which one is grateful; divine favor
Example
Having good health is a blessing that we should cherish.
拥有良好的健康是我们应该珍惜的祝福。
B1 noun ˈbaʊndəri

boundary

边界
Meaning
A line that marks the limits of an area; a dividing line.
Example
The river marks the boundary.
河流标记边界。
C2 adjective /bəˈθɛt.ɪk/

bathetic

琐碎的情感
Meaning
displaying insincere or trivial emotion; producing an unintended ridiculous effect through sudden change from serious to silly
Example
The movie's ending was unintentionally bathetic rather than tragic.
电影的结局是琐碎的，而不是悲剧性的。
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。
C2 verb /bɪˈfʌdəl/

befuddle

使困惑
Meaning
to confuse someone completely; to make someone unable to think clearly
Example
The complex instructions befuddled the students.
复杂的指示使学生感到困惑。
B1 noun /ˌbækˈjɑːrd/

backyard

幸福
Meaning
an area of land behind a house, typically used for recreation or gardening
Example
The children played football in the backyard.
当她收到奖项时，她无法掩饰自己的幸福。
B2 noun /ˈbeə.rər/

Bearer

持有者；文件持有者
Meaning
a person who carries or brings something; holder of a document
Example
The bearer of this message must deliver it quickly.
这个信息的持有者必须快速送达它。
B2 verb /bɪˈtreɪ/

betray

背叛
Meaning
to be disloyal to; to reveal secrets
Example
He felt betrayed by his closest friend.
他感到被他最亲密的朋友背叛。
B2 noun /ˈbev.ər.ɪdʒ/

Beverage

饮料
Meaning
a drink, especially one other than water
Example
Would you like a hot or cold beverage with your meal?
你想要和你的餐一起喝热的还是冷的饮料？
B2 adjective /bɪˈheɪvjərəl/

behavioral

行为的
Meaning
relating to the way a person or animal acts
Example
The psychologist studied the child's behavioral patterns.
心理学家研究了孩子的行为模式。
C1 noun, verb /ˈbʌtrəs/

buttress

扶壁，支撑
Meaning
a structure built against a wall for support; to support or strengthen
Example
The cathedral walls were buttressed to prevent collapse.
大教堂的墙壁被支撑以防止倒塌。
B2 noun /ˈbrʌðərhʊd/

brotherhood

兄弟情谊
Meaning
The relationship between brothers; an association of people with common interests
Example
The soldiers shared a strong sense of brotherhood.
士兵们分享了强烈的兄弟情谊。
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。
A1 adjective /ˈbɪzi/

busy

忙碌
Meaning
actively engaged in work or activity; occupied
Example
He is too busy to answer the phone.
他太忙了，无法接电话。
B2 verb /bræɡ/

brag

吹嘘
Meaning
to talk proudly about oneself or one's achievements in an annoying way
Example
He always brags about his expensive car.
他总是夸耀自己昂贵的车。
C2 noun /ˈbʊlwərk/

bulwark

防线
Meaning
A strong wall or defensive structure; something that provides protection or support.
Example
The fortress walls served as a bulwark against enemy attacks.
堡垒的墙壁作为抵御敌人攻击的防线。
A2 verb /ˈbɑroʊ/

borrow

借
Meaning
to take temporarily with intention to return; to take on loan
Example
Can I borrow your pen for a moment?
我可以借一下你的笔吗？
A1 noun /ˈbeɪbi/

baby

婴儿
Meaning
a very young child, especially one newly or recently born
Example
The baby is sleeping peacefully in the crib.
婴儿正在婴儿床上安静地睡觉。
C2 verb /bɪˈmjuːz/

bemuse

使困惑
Meaning
To confuse or puzzle someone.
Example
The complex instructions bemused the new employees.
复杂的指令使新员工困惑。
C2 adjective /ˈbɪz.ən.taɪn/ or /ˈbaɪ.zənˌtiːn/

byzantine

复杂
Meaning
Extremely complicated and detailed; relating to the Byzantine Empire or its style.
Example
The new tax regulations are so byzantine that few understand them.
新的税收规定非常复杂，很少有人能理解。
C2 noun /ˈbɜːrsər/

bursar

财务主管
Meaning
An official in a school or college responsible for financial affairs.
Example
The bursar approved the budget for the new library.
财务主管批准了新图书馆的预算。
C2 noun /breɪ/

brae

山坡
Meaning
A hillside or slope, especially in Scotland.
Example
They climbed up the grassy brae to see the sunset.
他们爬上了长满草的山坡去看日落。
C2 noun /bəˈfuːn/

buffoon

小丑
Meaning
A ridiculous but amusing person; a clown or jester.
Example
He acted like a buffoon at the party, making everyone laugh.
他在派对上像个小丑一样表演，让每个人都笑了。
B2 adjective /bɪˈliːvəbl̩/

believable

可信的
Meaning
Able to be trusted or accepted as true or reasonable.
Example
Her story was so detailed that it sounded believable.
她的故事如此详细，以至于听起来很可信。
A1 adjective /ˈbjuː.tɪ.fəl/

Beautiful

美丽的; 吸引人的; 迷人的;
Meaning
pleasing to the senses; attractive; having qualities that give great pleasure
Example
She has a beautiful voice that captivates everyone.
她有一副美丽的嗓音，吸引着每个人。
B1 verb /ˈbɑrɡɪn/

bargain

讨价还价
Meaning
to negotiate terms; to discuss prices; to make a deal
Example
She likes to bargain at the local market.
她喜欢在当地市场讨价还价。
B1 noun /ˈbaɪbəl/

bible

圣经
Meaning
the Christian scriptures consisting of the Old and New Testaments; also used for any authoritative book
Example
She reads the Bible every morning.
她每天早晨读圣经。
A2 adverb /ˈbædli/

badly

糟糕
Meaning
in a way that is not good; poorly or severely
Example
He performed badly in the exam.
他在考试中表现得很差。
A1 noun /ˈbaɪ.sɪ.kəl/

Bicycle

自行车
Meaning
A vehicle with two wheels that you pedal to make it move
Example
She rides her bicycle to work every day.
她每天骑自行车去上班。
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。
C2 verb /bɪˈliːɡər/

beleaguer

围困, 烦扰
Meaning
to cause difficulties, troubles, or harassment; to surround with military forces
Example
The company was beleaguered by constant complaints from its customers.
该公司因客户不断的投诉而被围困。
B2 noun /ˈbætəlˌfiːld/

battlefield

战场
Meaning
a place where a battle is fought
Example
The battlefield was covered with the remnants of the fight.
战场上布满了战斗的残余。
B2 adjective /bliːk/

bleak

阴郁的
Meaning
cold, miserable, or without hope
Example
The future seemed bleak after the economic downturn.
经济衰退后，未来显得阴郁。
B2 noun/adjective /ˈbʌmpər/

bumper

保险杠
Meaning
A protective bar at the front or back of a vehicle; also used to describe something unusually large or successful.
Example
The farmer celebrated a bumper harvest this year.
农民今年庆祝了一个丰收的年份。
C2 noun /bjuːt/

butte

孤山
Meaning
an isolated hill with steep sides and a flat top, common in arid regions
Example
The travelers could see a tall butte rising in the desert.
旅行者们能看到沙漠中一座高耸的孤山。
B2 verb /buːst/

boost

提升
Meaning
To increase, improve, or raise something.
Example
The company launched a campaign to boost sales.
公司启动了一项活动以提升销售。
A2 noun /ˈbʌtərflaɪ/

butterfly

蝴蝶
Meaning
an insect with large, often brightly colored wings that flies during the day
Example
A beautiful butterfly landed on the flower.
一只美丽的蝴蝶停在花上。
B1 noun /ˈbed ˌkʌv.ər/

Bed cover

床罩
Meaning
a protective covering for a bed, typically a bedspread or comforter
Example
She pulled the bed cover up to her chin to stay warm.
她把床罩拉到下巴，保持温暖。
B1 noun /ˈbɔr.dər/

Border

边界
Meaning
a line separating two political or geographical areas, especially countries
Example
They crossed the border between France and Spain by train.
他们乘火车穿越了法国和西班牙之间的边界。
B2 noun, verb /bʌt/

butt

Meaning
to hit or push with the head or horns; the end part of something, especially a cigarette
Example
The goat butted the fence with its horns.
C1 verb, noun /ˈbrɪsəl/

bristle

刚毛; 愤怒反应
Meaning
to react angrily or defensively; a short stiff hair or fiber
Example
The cat bristled when it saw the dog.
猫看到狗时毛发竖起来。
A1 verb /brɪŋ/

bring

带来
Meaning
to carry or take something to a place; to come with something
Example
Please bring your books to class tomorrow.
请明天把你的书带到课堂。
A2 noun /buːt/

Boot

靴子
Meaning
sturdy footwear covering the foot and ankle or lower leg
Example
He laced up his hiking boots before the mountain trek.
他在山地旅行前穿上了他的登山靴。
A2 noun /ˈbeɪsˌbɔːl/

baseball

棒球
Meaning
a sport in which two teams try to score runs by hitting a ball and running around bases
Example
He loves watching baseball games on TV.
他喜欢在电视上观看棒球比赛。
C2 verb /ˈbækbaɪt/

backbite

背后说坏话
Meaning
to speak negatively about someone who is not present; to slander behind someone’s back
Example
It is wrong to backbite your colleagues behind their backs.
在背后说同事的坏话是不对的。
A1 noun /bɜːrd/

bird

鸟
Meaning
a warm-blooded animal with feathers and wings that usually lays eggs and can often fly
Example
A bird was singing on the tree branch.
一只鸟在树枝上唱歌。
C2 noun /ˈbriːtʃɪz/

Breeckes

膝盖长度裤子
Meaning
knee-length trousers; short pants
Example
He wore riding breeches for the equestrian event.
他为马术比赛穿了膝盖长度裤子。
B2 adjective /beər/

Bare

裸; 未覆盖; 空; 最少
Meaning
naked; uncovered; empty; minimal
Example
The bare walls of the room needed some decoration.
房间的光秃秃的墙壁需要一些装饰。
C2 noun /ˈbɜːrdʒɪs/

burgess

市民
Meaning
A citizen of a town or borough with full rights of citizenship.
Example
In medieval times, a burgess had the right to vote and hold property.
在中世纪，市民有投票权和拥有财产的权利。
B2 adjective /bɪˈzɑːr/

bizarre

离奇
Meaning
very strange or unusual, especially so as to cause interest or amusement
Example
He told a bizarre story that no one could believe.
他讲了一个离奇的故事，没有人能相信。
C2 noun /ˌbʌkəˈnɪər/

buccaneer

海盗
Meaning
a pirate, especially one active in the Caribbean during the 17th and 18th centuries
Example
The buccaneer sailed across the Caribbean in search of treasure.
这位海盗在加勒比海中航行，寻找宝藏。
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。
B2 adjective /ˈbleɪzɪŋ/

Blazing

燃烧的; 炽热的
Meaning
burning fiercely; extremely hot; very bright
Example
The blazing sun made the day extremely hot.
炽热的太阳使得这一天异常炎热。
B2 noun ˌbaɪ.oʊ.dɪˈvɝː.sə.t̬i

biodiversity

生物多样性
Meaning
The variety of life in the world or in a particular habitat or ecosystem.
Example
Rainforests are home to immense biodiversity.
雨林是巨大的生物多样性的家园。
B1 noun /ˈbæɹɪəz/

barriers

障碍
Meaning
Something that prevents progress or access; obstacles or hindrances.
Example
Language barriers can make communication difficult.
语言障碍可能会使沟通变得困难。
B2 adjective /ˌbaɪəʊdɪˈɡreɪdəbl/

biodegradable

可生物降解的
Meaning
Capable of being decomposed by natural biological processes, typically by bacteria or other living organisms, without causing harm to the environment.
Example
Biodegradable materials break down naturally without harming the environment.
可生物降解的材料自然分解，不会对环境造成伤害。
C2 adjective /bjuːˈkɒlɪk/

bucolic

田园
Meaning
Relating to the pleasant aspects of the countryside and country life.
Example
They enjoyed a bucolic picnic by the river.
他们在河边享受了一次田园式的野餐。
C2 noun /bleɪn/

Blain

水泡
Meaning
an inflammatory swelling or sore on the skin; a blister or pustule
Example
The doctor examined the blain on his arm.
医生检查了他手臂上的水泡。
C2 noun ˌbaɪ.oʊ.əˈveɪ.lə.bɪl.ə.ti

bioavailability

身体吸收能力
Meaning
The degree to which a substance can be absorbed and used by the body.
Example
Turmeric's bioavailability increases when consumed with black pepper.
姜黄的生物可利用性在与黑胡椒一起食用时增加。
B1 noun /bʊʃ/

bush

灌木丛
Meaning
a plant with many small branches growing close to the ground; a shrub
Example
A rabbit was hiding under the bush.
一只兔子藏在灌木丛下。
C2 adjective /ˈbʊərɪʃ/

boorish

粗鲁
Meaning
Rude, insensitive, and lacking manners or refinement.
Example
His boorish behavior ruined the dinner party.
他的粗鲁行为毁了晚宴。
C2 noun /bəˈnæləti/

banality

平凡
Meaning
The condition of being unoriginal, boring, or obvious; trite remark or quality.
Example
The speech was criticized for its banality and lack of originality.
这篇演讲因其平凡和缺乏原创性而受到批评。
B2 verb /boʊlt/

bolt

突然跑掉; 用螺栓固定某物
Meaning
To move suddenly and quickly; also to fasten something with a bolt.
Example
The horse bolted from the stable after hearing a loud noise.
马在听到一声大响后从马厩冲了出去。
A1 adjective /bɛst/

best

最好
Meaning
Of the highest quality, excellence, or standing.
Example
She is the best student in the class.
她是班里最好的学生。
C1 verb /blɛər/

blare

发出响亮的声音
Meaning
to make a loud, harsh sound
Example
The car horns blared all night.
汽车的喇叭整夜都在响。
A2 noun /bɪl/

Bill

鸟嘴
Meaning
the beak of a bird, especially when it is broad and flat
Example
The duck used its bill to filter food from the water.
那只鸭子用它的喙从水中过滤食物。
C1 adjective /bəˈnɑːl/ or /ˈbeɪnəl/

banal

平庸
Meaning
Lacking originality; boringly obvious and commonplace.
Example
His speech was full of banal clichés.
他的演讲充满了平庸的陈词滥调。