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B2 noun, verb /dɪˈfɔːlt/

default

违约
Meaning
failure to fulfill an obligation, especially to repay a loan
Example
The company defaulted on its loan payments.
公司在贷款支付方面违约。
C1 noun /ˈdɛmənˌstreɪtər/

demonstrator

示范者, 抗议者
Meaning
a person who shows how something works or takes part in a public protest
Example
The demonstrators marched peacefully through the city streets.
示威者和平地穿过城市街道游行。
C2 noun /djuːˈɛnə/

duenna

女家庭教师
Meaning
an older woman acting as a governess or chaperone, especially in Spanish families
Example
The young lady was accompanied by a duenna during the festival.
年轻女士在节日期间由一位杜埃纳陪同。
C1 noun /ˈdɪɡnɪˌtɛri/

dignitary

重要人物
Meaning
a person considered to be important because of high rank or office
Example
Several foreign dignitaries attended the state banquet.
几位外国重要人物出席了国宴。
C1 noun /ˈdrɛsˌmeɪkər/

dressmaker

女裁缝
Meaning
A person who makes or alters women's clothing professionally.
Example
The dressmaker crafted a beautiful gown for the bride.
女裁缝为新娘制作了一件漂亮的礼服。
C1 adjective /ˈdjuːtɪfəl/

Dutiful

尽职的；尊敬的；顺从的
Meaning
conscientiously fulfilling one's duty; obedient; respectful
Example
She is a dutiful daughter who always helps her parents.
她是一个尽职的女儿，总是帮助她的父母。
C1 noun daɪˈkɒtəmi

dichotomy

二分法
Meaning
A division or contrast between two things that are or are represented as being opposed or entirely different.
Example
The dichotomy between tradition and modernity is often debated.
传统与现代之间的二分法常常被讨论。
C1 verb, noun /dɪsˈkrɛdɪt/

discredit

诋毁
Meaning
To harm the reputation of someone or something; loss of respect or credibility.
Example
The scandal discredited the politician in the eyes of the public.
丑闻使这位政治家在公众眼中失去了信誉。
B2 noun /ˈdiːlər/

dealer

经销商
Meaning
a person or business that buys and sells goods; someone who distributes
Example
The car dealer offered a discount to attract customers.
汽车经销商提供了折扣以吸引客户。
C1 noun ˌdɛməˈɡræfɪk trænˈzɪʃən

demographic transition

人口过渡
Meaning
A shift in population patterns from high birth and death rates to low birth and death rates as a country develops economically
Example
The demographic transition indicates a shift towards an aging society.
人口过渡表示向老龄化社会的转变。
B2 verb dɪsˈrʌpt

disrupt

破坏
Meaning
To interrupt or disturb the normal progress or activity of something.
Example
Individual pursuits disrupt social harmony.
个人追求破坏了社会和谐。
C2 noun /dɪˈpɔːrtmənt/

deportment

举止
Meaning
A person's behavior or manners, especially in a formal situation.
Example
Her deportment during the ceremony impressed everyone.
她在仪式中的举止给大家留下了深刻印象。
B2 noun /ˈdɪdʒɪt/

digit

Meaning
a numeral from 0 to 9; also a finger or toe
Example
You must enter a four-digit code to unlock the phone.
C1 noun, adjective /dɪˈfiːtɪst/

defeatist

失败主义者
Meaning
A person who expects or is excessively ready to accept failure; showing a tendency to expect defeat.
Example
His defeatist attitude discouraged the rest of the team.
他的失败主义态度使队伍中的其他人感到灰心。
B2 noun /ˈdɛməˌkræt/

democrat

民主党人
Meaning
a supporter of democracy or a member of the Democratic Party in the US
Example
He is a strong democrat who believes in equal rights.
他是一个坚强的民主党人，相信平等的权利。
B2 noun /ˈden.sə.ti/

Density

密度
Meaning
the degree of compactness of a substance; the quantity of something per unit area
Example
The density of population in the city center is extremely high.
市中心的人口密度极高。
C2 adjective /dɪsˈkʌmfɪtɪŋ/

discomfiting

令人不安
Meaning
Causing unease, embarrassment, or discomfort.
Example
His discomfiting questions made everyone shift uncomfortably in their seats.
他那令人不安的问题让大家在座位上不舒服地动来动去。
A1 noun /ˈdɒlər/

dollar

美元
Meaning
The basic monetary unit of the United States and some other countries
Example
I need five dollars to buy this book.
我需要五美元来买这本书。
C1 noun /ˈdeɪ.li.ə/

Dahlia

大丽花
Meaning
a garden plant with brightly colored flowers that bloom in summer and autumn
Example
She planted colorful dahlias in her garden last summer.
她在去年夏天在花园里种了五颜六色的大丽花。
C1 verb /dɪsˈpruːv/

disprove

反驳
Meaning
to show that something is false or wrong
Example
The scientist worked hard to disprove the old theory.
科学家努力工作以反驳旧理论。
B2 noun /dɪsˈmɪsl̩/

dismissal

解雇, 拒绝
Meaning
the act of removing someone from their job; the act of treating something as unimportant
Example
His unfair dismissal led to a lawsuit against the company.
他的不公正解雇导致了对公司的诉讼。
C1 verb /dɪˈfaɪl/

defile

亵渎
Meaning
to pollute, corrupt, or make dirty
Example
The river was defiled by industrial waste.
河流被工业废物亵渎了。
C1 adjective /dɪˈfaɪənt/

Defiant

挑衅的; 不服从的
Meaning
boldly resistant or challenging; disobedient
Example
The defiant student refused to follow the rules.
那个挑战性的学生拒绝遵守规则。
C1 verb /dɪˈflɛkt/

deflect

偏离 / 避免
Meaning
to cause something to change direction; to avoid answering directly
Example
The shield deflected the incoming arrow.
盾牌偏离了来袭的箭。
A2 verb, noun /drɒp/

drop

掉 / 水滴
Meaning
to let something fall; a small quantity of liquid
Example
Be careful not to drop your phone.
小心不要把手机掉了。
C1 noun /ˈdɛspətɪzəm/

despotism

专制主义
Meaning
absolute power exercised in a cruel and oppressive way
Example
The people revolted against the era of despotism.
人民反抗了专制主义的时代。
C1 noun delˈteɪɪk ˈlændskeɪp

deltaic landscape

三角洲景观
Meaning
A geographical area formed by sediment deposits at the mouth of a river, creating a triangular land formation.
Example
Bangladesh has a unique deltaic landscape.
孟加拉国拥有独特的三角洲景观。
B2 adjective /dæmp/

damp

潮湿的
Meaning
slightly wet, often in an unpleasant way
Example
The room felt cold and damp after the rain.
下雨后，房间感觉又冷又潮湿。
B1 verb /dɪˈspleɪ/

display

展示
Meaning
to show or exhibit; to present for others to see
Example
The museum displays ancient artifacts.
博物馆展示古代文物。
C1 verb /dɪˈspɛns/

dispense

分配
Meaning
To distribute or provide something, especially in portions.
Example
The machine dispenses clean drinking water.
机器分配干净的饮用水。
B2 noun /ˈdeb.riː/

debris

碎片
Meaning
Scattered pieces of waste or remains.
Example
Debris in the eyes causes irritation.
眼睛里的碎片会引起刺激。
C2 verb /ˌdɪspəˈzɛs/

dispossess

剥夺
Meaning
to deprive someone of land, property, or other possessions
Example
The new law threatened to dispossess many farmers of their land.
新法律威胁着剥夺许多农民的土地。
C2 noun /dɪˈbɛntʃər/

debenture

债券
Meaning
a type of debt instrument not secured by physical assets or collateral
Example
The company raised capital by issuing debentures to investors.
公司通过向投资者发行债券筹集资金。
B2 noun /ˈdraɪv.weɪ/

driveway

车道
Meaning
a short private road leading from a street to a house or garage
Example
The car was parked in the driveway next to the garden.
车子停在花园旁的车道上。
B1 adjective /def/

Deaf

聋; 听力障碍
Meaning
unable to hear; having a hearing impairment
Example
The deaf child learned to communicate using sign language.
那个聋哑孩子学会了使用手语进行沟通。
C1 noun ˌdjʊə.rəˈbɪl.ə.ti

durability

耐用性
Meaning
The ability to withstand wear, pressure, or damage; hard-wearing.
Example
The durability of materials affects performance.
材料的耐用性会影响性能。
B2 adjective /dɪˈfensɪv/

Defensive

防御性
Meaning
used or intended to defend or protect; showing a tendency to react in an angry or hurt way when criticized
Example
He became defensive when criticized about his work.
当他因为工作受到批评时，他变得防御性很强。
C1 noun /ˈdɑːsieɪ/

dossier

档案
Meaning
A collection of documents about a particular person, event, or subject.
Example
The lawyer presented a dossier of evidence to the court.
律师向法庭提交了一个证据档案。
C2 noun /ˈdeɪ.mæn/

day-man

日工
Meaning
a worker employed by the day; a day laborer
Example
The farmer hired a day-man to help with the harvest.
农民雇佣了一个日工来帮助收割。
B2 noun /ˌdɪsəˈpruːvəl/

disapproval

不赞成
Meaning
The expression of an unfavorable opinion or judgment
Example
Her parents showed clear disapproval of her decision to drop out of college.
她的父母对她辍学的决定表现出明显的不赞成。
C1 verb /dəˈmɛstɪkeɪt/

domesticate

驯化
Meaning
to tame an animal for use by humans; to adapt something for domestic use
Example
Humans domesticated dogs thousands of years ago.
人类几千年前驯化了狗。
C2 noun /dɪsˈtɛmpər/

distemper

一种影响动物的病毒性疾病，特别是狗
Meaning
a viral disease affecting animals, especially dogs; also refers to a state of disorder
Example
The dog was diagnosed with distemper and needed immediate care.
这只狗被诊断为患有犬瘟热，需要立即治疗。
C2 verb /dɪˈnɒmɪˌneɪt/

denominate

指定
Meaning
to give a name or designation to something
Example
The currency was denominated in dollars.
货币以美元命名。
C1 adjective /ˈdɪzməl/

Dismal

阴沉的; 沮丧的; 令人悲伤的
Meaning
gloomy; depressing; causing sadness or despair
Example
The weather was dismal with heavy rain and dark clouds.
天气阴沉，伴随大雨和黑暗的云层。
C2 noun /ˈdɛskænt/

descant

附加旋律
Meaning
An additional melody or counterpoint sung or played above the main melody.
Example
The choir added a beautiful descant to the hymn.
合唱团为赞美诗添加了一段美丽的附加旋律。
C2 adjective /ˈdɛsɪkeɪtɪd/

desiccated

干燥的
Meaning
completely dried, having had all moisture removed
Example
The museum displayed desiccated specimens of plants.
博物馆展示了干燥的植物标本。
C2 adjective /dɪˈkɔːrəs/

decourous

得体
Meaning
characterized by propriety, good taste, and proper manners
Example
She maintained a decourous silence during the ceremony.
她在仪式上保持了得体的沉默。
B1 noun /ˌdɛmənˈstreɪʃən/

demonstration

示威, 示范
Meaning
the act of showing something clearly, or a public protest
Example
The workers organized a demonstration for better wages.
工人们组织了一场争取更高工资的示威。
B2 noun dɪˈplɔɪmənt

deployment

部署
Meaning
The action of bringing resources into effective action.
Example
The deployment of the new software was completed successfully.
新软件的部署成功完成。
C2 noun /ˈdiːɪst/

deist

自然神论者
Meaning
a person who believes in the existence of a supreme being but rejects organized religion
Example
The philosopher identified himself as a deist.
这位哲学家把自己认定为自然神论者。
A2 adverb /ˌdaʊnˈsteəz/

Downstairs

楼下
Meaning
on or to a lower floor of a building
Example
Please go downstairs and wait in the lobby.
请下楼并在大厅等候。
B1 noun /dʌst/

dust

灰尘
Meaning
Fine particles of matter.
Example
Road dust is a major pollutant in urban areas.
路上的灰尘是城市地区的主要污染物。
C2 adjective /daɪˈæfənəs/

diaphanous

透明的
Meaning
Light, delicate, and translucent.
Example
She wore a diaphanous dress that shimmered in the sunlight.
她穿着一件透明的裙子，在阳光下闪闪发光。
C1 adjective /dɪˈsɪd.ju.əs/

deciduous

落叶性
Meaning
Referring to trees that shed their leaves seasonally, typically in autumn.
Example
Oak and maple trees are deciduous, shedding leaves in autumn.
橡树和枫树是落叶性树木，在秋天掉落叶子。
B2 adjective /daɪˈnæm.ɪk/

dynamic

动态
Meaning
Characterized by constant change, activity, or progress.
Example
Life flows in a dynamic stream.
生活在动态的河流中流动。
C1 noun /ˈdaɪhɑːrd/

diehard

Meaning
A person who strongly resists change and remains loyal to a belief or cause.
Example
He is a diehard fan of classic rock music.
C1 noun /djuːn/

dune

沙丘
Meaning
A hill or ridge of sand formed by the wind, usually found in deserts or near beaches.
Example
The children played on the sand dune by the beach.
孩子们在海滩旁的沙丘上玩耍。
C1 verb dɪˈsɜːn

discern

辨别
Meaning
To perceive or recognize something; to distinguish with difficulty by sight or with the other senses.
Example
He could barely discern the distant figure in the fog.
他几乎无法在雾中辨认出远处的身影。
C1 adjective /ˈdɪn.dʒi/

Dingy

肮脏和阴沉的; 色彩暗淡
Meaning
dark and dirty; gloomy; dull in color
Example
The old building had dingy walls that needed painting.
这座老建筑有肮脏的墙壁，需要粉刷。
B2 noun /djʊˈreɪʃən/

duration

持续时间
Meaning
the length of time that something continues
Example
The meeting lasted for the duration of two hours.
会议持续了两个小时。
C1 noun /dɪˌsem.ɪˈneɪ.ʃən/

dissemination

传播
Meaning
The action or fact of spreading something, especially information, widely.
Example
The dissemination of false information is a major issue.
错误信息的传播是一个严重问题。
B1 noun /dɪˈsɪʒənˌmeɪkɪŋ/

decision-making

决策制定
Meaning
the process of making decisions, especially important or business-related decisions
Example
The CEO's decision-making was crucial for the success of the company.
CEO的决策制定对公司成功至关重要。
A2 noun dɪˈveləpmənt

development

发展
Meaning
The process of developing or being developed; growth or progress.
Example
Development of Bengali society was hindered.
孟加拉社会的发展受到了阻碍。
C1 verb /ˈdræm.ə.taɪz/

dramatize

戏剧化
Meaning
to present a story in a dramatic way, or to exaggerate something
Example
The novel was dramatized into a popular TV series.
这本小说被改编成了一部受欢迎的电视系列剧。
C2 noun dɪsˈbɜːs.mənt

disbursement

支付
Meaning
The payment of money from a fund.
Example
The company's disbursement of salaries was delayed.
公司的工资支付被延迟了。
B1 verb /dɪˈfɛnd/

defend

辩护
Meaning
To protect someone or something from harm or attack.
Example
The lawyer worked hard to defend her client.
律师努力工作为她的客户辩护。
A2 adjective /dʌtʃ/

dutch

荷兰的
Meaning
relating to the Netherlands, its people, or their language
Example
She enjoys Dutch paintings from the 17th century.
她喜欢17世纪的荷兰画作。
C1 adjective /ˈdek.stər.əs/

dexterous

灵巧
Meaning
Showing or having skill, especially with the hands; mentally adroit and skillful.
Example
A dexterous programmer can write complex codes effortlessly.
一个灵巧的程序员可以毫不费力地写出复杂的代码。
C1 verb /ˌdiː.kəmˈprɛs/

decompress

放松
Meaning
To relax and recover from stress or pressure.
Example
Taking deep breaths helps to decompress after a stressful day.
深呼吸帮助在压力过大的日子后放松。
B1 noun /ˈdaɪ.ə.lɑːɡ/

Dialogue

对话; 会话
Meaning
a conversation between two or more people; discussion aimed at exploration of a subject
Example
The political leaders engaged in meaningful dialogue to resolve the conflict.
政治领导人进行了一场有意义的对话，以解决冲突。
C1 verb /ˈdɛsɪmeɪt/

decimate

摧毁
Meaning
To destroy or kill a large proportion of something.
Example
The wildfire decimated the forest.
火灾摧毁了森林。
C1 noun /deɪˈtɒnt/

detente

缓和紧张关系
Meaning
the easing of strained relations, especially between countries
Example
The treaty helped bring about a détente between the two nations.
该条约有助于缓解两个国家之间的紧张关系。
C1 noun dɪˈfleɪʃən

deflation

通货紧缩
Meaning
Reduction of the general level of prices in an economy.
Example
Deflation often leads to decreased consumer spending.
通货紧缩往往导致消费者支出减少。
C2 adjective /dɪˈrɒɡətɪv/

derogative

贬低的
Meaning
Expressing a low opinion or showing lack of respect.
Example
He made a derogative remark about her work.
他对她的工作做了贬低的评论。
B2 verb /dɪˈzɒlv/

dissolve

Meaning
to melt or become liquid; to officially end or break up an agreement or organization
Example
The sugar will dissolve quickly in hot tea.
C2 adjective /ˌdɒktrɪˈnɛər/

doctrinaire

教条主义者
Meaning
stubbornly devoted to a theory or doctrine without regard to practical considerations
Example
His doctrinaire approach to politics alienated many supporters.
他对政治的教条主义方法使许多支持者感到疏远。
C1 verb /dɪˈspɜːrs/

disperse

驱散
Meaning
To scatter or spread widely in different directions.
Example
The police used tear gas to disperse the crowd.
警方使用催泪瓦斯驱散人群。
C1 noun /dɪˈkriː/

Decree

法令
Meaning
an official order issued by a legal authority; a judicial decision or edict
Example
The king issued a decree that all citizens must pay additional taxes.
国王发布了一个法令，要求所有公民支付额外税款。
C2 noun /ˈdrækmə/

drachma

德拉克马
Meaning
The basic monetary unit of Greece before the adoption of the euro.
Example
The old coin collection included a silver drachma.
这枚古老的硬币收藏包括一枚银德拉克马。
B2 adjective /dɪˈprɛst/

depressed

沮喪
Meaning
Feeling very sad and without hope; in a state of unhappiness.
Example
She felt depressed after losing her job.
失去工作後，她感到沮喪。
C1 verb /deɪz/

daze

Meaning
to stun or confuse someone temporarily with a shock or surprise
Example
The bright lights dazed the runners as they entered the stadium.
C2 noun /ˌdɪsəˈvaʊəl/

disavowal

否认
Meaning
the denial of any responsibility, connection, or support
Example
The politician issued a firm disavowal of the controversial remarks.
该政治家对有争议的言论发表了强烈的否认。
C2 verb /diːˈmoʊbəlaɪz/

demobilize

解散
Meaning
To release from military service or to disband troops.
Example
The government decided to demobilize the army after the war.
政府决定在战争后解散军队。
B2 noun /dɪˈpen.dəns/

Dependence

依赖
Meaning
the state of relying on or needing someone or something for support; addiction
Example
His dependence on technology made it difficult for him to work without internet.
他对科技的依赖使得他在没有互联网的情况下很难工作。
C2 adjective /dɪˈluːsəri/

delusory

虚幻的
Meaning
Based on illusion; not real.
Example
He was filled with delusory hopes of becoming famous overnight.
他充满了不切实际的希望，认为自己一夜成名。
B2 noun /dɪˈsɛnt/

descent

下降 / 血统
Meaning
the action of moving downward, falling, or dropping; ancestry or origin
Example
The climbers began their descent from the mountain peak.
登山者从山顶开始下降。
A2 noun /ˈdjuː.ti/

Duty

责任
Meaning
something that one is expected or required to do; moral or legal obligation
Example
It is our duty as citizens to vote in elections.
作为公民，我们有责任在选举中投票。
C1 noun /dɪˈvaɪzər/

divisor

除数
Meaning
A number by which another number is divided.
Example
In the equation 12 ÷ 3, the number 3 is the divisor.
在方程式12 ÷ 3中，数字3是除数。
C2 adjective /ˌdɛfəˈrɛnʃəl/

deferential

尊敬的
Meaning
Showing or expressing respect and high regard.
Example
He was always deferential toward his teachers.
他总是对他的老师表现出尊敬。
C2 verb /ˌdɪskəmˈpoʊz/

discompose

打乱
Meaning
To disturb the order or calmness of something or someone.
Example
The unexpected question seemed to discompose her.
出乎意料的问题似乎让她不知所措。
C1 noun /diːˈkrɪp.ʃən/

decryption

解密
Meaning
The process of converting encrypted data back into its original form so it can be understood.
Example
Hackers attempted decryption of classified data.
黑客试图解密机密数据。
A1 noun /dres/

Dress

裙子
Meaning
a piece of clothing for women or girls that covers the body and extends down over the legs
Example
She wore a beautiful blue dress to the party.
她穿了一件漂亮的蓝色裙子参加派对。
C1 adjective /dɪˈspɪrɪtɪd/

dispirited

沮喪
Meaning
Having lost enthusiasm, hope, or confidence; dejected.
Example
After losing the match, the team looked dispirited.
比赛失利后，团队看起来沮丧。
C2 noun /ˈdɛrɪk/

derrick

钻井塔
Meaning
A framework or tower used for supporting a crane, especially for oil drilling or lifting heavy loads.
Example
The workers assembled a derrick at the oil drilling site.
工人们在石油钻井现场组装了一座钻井塔。
B2 noun/verb /dræft/

draft

草稿
Meaning
A preliminary version of a piece of writing; to prepare a preliminary version of a document.
Example
She finished the first draft of her novel.
她完成了小说的第一份草稿。
C2 noun /ˈduːti/

Dhuti

杜提
Meaning
a traditional Indian garment for men consisting of a piece of unstitched cloth worn around the waist and legs
Example
The elderly man wore a white dhuti during the religious ceremony.
老人穿着白色杜提参加宗教仪式。
C2 noun /daɪˈvɛstɪtʃər/

divestiture

资产剥离
Meaning
the action of selling off or disposing of business interests or assets
Example
The divestiture of the subsidiary was completed last year.
子公司的资产剥离于去年完成。
A2 adjective /dɑːrk bluː/

Dark blue

深蓝色
Meaning
a deep shade of blue color
Example
She wore a dark blue dress to the party.
她穿着一件深蓝色的裙子去参加派对。
C1 verb /ˈdæmpən/

dampen

使潮湿，减弱
Meaning
to make something slightly wet; to make something less strong, active, or intense
Example
The rain dampened the excitement of the outdoor concert.
雨水减弱了户外音乐会的兴奋。
C2 verb /dɪsˈbɜːrdən/

disburden

减轻负担
Meaning
to relieve someone of a burden or load
Example
She disburdened herself of worries by sharing them with her friend.
她通过与朋友分享担忧，解除了自己的负担。
B2 verb /dɪˈstrækt/

distract

分心
Meaning
to take someone's attention away from what they are doing or focusing on
Example
The loud noise distracted her during the exam.
大声噪音让她在考试中分心。
C1 noun ˌdɪm.ɪˈnjuː.ʃən

diminution

减少
Meaning
A reduction in the size, extent, or importance of something; decrease.
Example
There has been a diminution in air pollution.
空气污染减少了。
C2 verb /dɪsˈɡɔːrdʒ/

disgorge

呕吐, 排放
Meaning
to discharge or pour out; to vomit; to give up reluctantly
Example
The broken pipe disgorged water all over the floor.
破损的管道把水排放到整个地板上。
C1 noun /ˌdev.əˈtiː/

Devotee

信徒; 崇拜者
Meaning
a person who is very interested in and enthusiastic about someone or something
Example
As a devotee of classical music, she attended every concert in the city.
作为古典音乐的信徒，她参加了城市中的每一场音乐会。
B1 noun ˈdɪdʒ.ɪ.təl tuːlz

digital tools

数字工具
Meaning
Electronic software and applications used for learning and educational purposes.
Example
Schools are integrating digital tools to enhance learning.
学校正在整合数字工具来增强学习效果。
C2 adjective /dɪsˈdʒʌŋktɪv/

disjunctive

选择性
Meaning
Serving to separate or divide; expressing a choice between alternatives.
Example
In grammar, 'or' is a disjunctive conjunction.
在语法中，'或' 是一个选择性连词。
C1 adjective dɒɡˈmæt.ɪk

dogmatic

教条的
Meaning
Being inclined to lay down principles as incontrovertibly true; characterized by arrogant assertion of unproven principles.
Example
His dogmatic approach to politics made discussions difficult.
他的教条的政治观点让讨论变得困难。
C2 noun /ˈdæl.i.əns/

Dalliance

短暂的恋情; 风流韵事
Meaning
a casual romantic or sexual relationship; a brief involvement or experiment
Example
His dalliance with photography lasted only a few months before he lost interest.
他与摄影的短暂关系只持续了几个月，之后他失去了兴趣。
B2 noun /ˈdiː.sən.si/

Decency

体面
Meaning
behavior that conforms to accepted standards of morality or respectability
Example
She had the decency to apologize for her mistake immediately.
她有体面，立即为她的错误道歉。
C2 noun /dɪˈkrɛpɪˌtjuːd/

decrepitude

衰败
Meaning
the state of being old, weak, and worn out
Example
The once-great empire fell into decrepitude.
曾经伟大的帝国陷入了衰败。
C1 noun/verb /dɛnt/

dent

凹痕
Meaning
a small hollow mark on the surface of something; to make a small hollow mark
Example
The accident left a dent in the car door.
事故在车门上留下了一个凹痕。
C1 verb ˈdwɪn.dl

dwindle

减少
Meaning
To diminish gradually in size, amount, or strength; to become progressively smaller.
Example
His savings dwindled due to unexpected expenses.
由于意外开销，他的储蓄减少了。
A2 adjective, noun /dɛd/

dead

死的
Meaning
No longer alive; the end of life.
Example
The old tree is completely dead.
那棵老树已经完全死了。
B2 noun dɪˈskrɛʃən

discretion

谨慎
Meaning
The quality of behaving or speaking in such a way as to avoid causing offense or revealing private information.
Example
She handled the situation with great discretion.
她以极大的谨慎处理了这一情况。
B2 noun /ˌdaɪəɡˈnoʊsɪs/

diagnosis

Meaning
The identification of a disease, condition, or problem through examination of symptoms.
Example
The diagnosis confirmed that she had diabetes.
B2 noun /ˈdɔːr.mæt/

Door-mat

门垫
Meaning
a mat placed in front of a door for wiping feet
Example
Please wipe your feet on the door-mat before entering the house.
请在进入房子之前在门垫上擦脚。
B2 adjective dɪˈlɪbəreɪt

deliberate

故意做的
Meaning
Done consciously and intentionally; carefully considered.
Example
His deliberate actions showed great care and thoughtfulness.
他的故意行为表现出极大的关心和深思熟虑。
C1 noun /ˈdaɪnəˌmoʊ/

dynamo

发电机; 一个充满能量和热情的人
Meaning
A machine that generates electricity; a person with great energy and enthusiasm.
Example
She is the real dynamo behind the success of the company.
她是公司成功背后的真正动力源。
B2 verb /dɪˈtekt/

detect

检测
Meaning
to discover or identify the presence or existence of something; to notice something that is not immediately obvious
Example
The security system can detect movement in the building.
安全系统可以检测到建筑物内的运动。
B2 adjective /dɛns/

dense

密集的
Meaning
Closely compacted in substance; having parts crowded together.
Example
The forest was so dense that little sunlight reached the ground.
森林是如此密集，以至于只有很少的阳光照射到地面。
A2 noun /dɪˈlɪv.ə.ri/

Delivery

递送; 分娩
Meaning
the action of delivering letters, parcels, or goods; the process of giving birth
Example
The delivery of the package was delayed due to bad weather conditions.
由于恶劣的天气条件，包裹的递送被延迟。