desperately
All a b c d e f g h i j k l m n o p q r s t u v w x y z
All CEFR A1 A2 B1 B2 C1 C2
Content locale
EN 英语 BN 孟加拉语 HI 印地语 ES 西班牙语 FR 法语 DE 德语 RU 俄语 ZH 中文 JA 日语
All Vocabulary Cards All Vocabularies
B2 adverb /ˈdɛspərətli/

desperately

绝望地
Meaning
in a way that shows despair or great need
Example
He called for help desperately after the accident.
事故发生后，他绝望地呼叫帮助。
B2 noun /dɪˈvoʊ.ʃən/

Devotion

忠诚; 热情; 奉献
Meaning
love, loyalty, or enthusiasm for a person, activity, or cause
Example
Her devotion to helping others made her a beloved figure in the community.
她对帮助他人的忠诚使她成为社区中的一个受人爱戴的人物。
B2 verb /dɪsˈkloʊz/

disclose

披露
Meaning
to reveal or make information known; to expose
Example
The company must disclose all financial information.
公司必须披露所有的财务信息。
B2 verb /dɪsˈmɪs/

dismiss

解雇, 否定
Meaning
to remove someone from a job or position; to decide something is not important
Example
The manager dismissed the employee for being late too often.
经理因为员工经常迟到而解雇了他。
B2 adjective /ˈdɛlɪkət/

delicate

脆弱
Meaning
Easily broken or damaged; requiring careful handling.
Example
The vase is very delicate, so handle it with care.
这个花瓶非常脆弱，所以请小心拿。
B2 verb /dɪˈplɔɪ/

deploy

部署
Meaning
to position strategically; to use effectively
Example
The military will deploy troops to the border.
军队将部署部队到边境。
B2 noun /diːp siː/

deep sea

深海
Meaning
The deep parts of the sea or ocean, typically beyond the continental shelf.
Example
Many deep-sea creatures produce bioluminescence for survival.
许多深海生物为了生存而产生生物发光。
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。
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 verb /dɪˈskrɪmɪˌneɪt/

discriminate

Meaning
To treat someone unfairly based on race, gender, or other differences; or to recognize a distinction.
Example
The law prohibits employers from discriminating against women.
B2 noun /dɪˈpləʊ.mə/

diploma

文凭
Meaning
an official document showing that a person has completed a course of study or training
Example
She received her diploma after finishing the nursing program.
她在完成护理课程后获得了文凭。
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。
B2 noun /ˈdeɪ.tə briːtʃ/

data breach

数据泄露
Meaning
Unauthorized disclosure of sensitive information through security violation
Example
A data breach exposed millions of users' passwords.
一次数据泄露暴露了数百万用户的密码。
B2 noun /dɒk/

dock

码头
Meaning
a structure where ships are loaded, unloaded, or repaired
Example
The ship stayed at the dock for two days.
船只在码头停留了两天。
B2 noun /ˈdel.ɪ.ɡət/

Delegate

代表
Meaning
a person chosen or elected to act for or represent others; representative
Example
Each country sent a delegate to participate in the international conference.
每个国家派遣了一个代表参加国际会议。
B2 noun/verb /dɪˈvɔːrs/

divorce

离婚
Meaning
the legal ending of a marriage; to officially end a marriage
Example
After years of conflict, they decided to get a divorce.
经过多年的冲突，他们决定离婚。
B2 noun /dɪsˈɡʌst/

Disgust

厌恶
Meaning
a feeling of revulsion or strong disapproval aroused by something unpleasant
Example
She expressed her disgust at the politician's corrupt behavior openly.
她公开表达了对政治家腐败行为的厌恶。
B2 noun /diˈoʊ.dər.ənt/

Deodorant

除臭剂
Meaning
a substance that removes or conceals unpleasant smells, especially bodily odors
Example
She applied deodorant before going to the gym to stay fresh during workout.
她在去健身房之前涂了除臭剂，以保持训练时的清新。
B2 adjective /ˈdɒm.ɪ.nənt/

Dominant

主导的; 有影响力的; 最重要的
Meaning
controlling, influencing, or prevailing over others; most important or powerful
Example
The dominant player controlled the entire basketball game.
主导的球员控制了整场篮球比赛。
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.
B2 adjective /dɪˈstɪŋɡwɪʃt/

Distinguished

杰出; 荣誉的; 著名的; 拥有尊严的外观或举止
Meaning
notable; honored; famous; having a dignified appearance or manner
Example
He is a distinguished professor at the university.
他是大学里一位杰出的教授。
B2 verb /dɪˈtɜːr/

deter

Meaning
to discourage someone from doing something by instilling doubt or fear
Example
High fines are meant to deter people from breaking the law.
B2 adverb dɪˈlɪb.ər.ət.li

deliberately

故意
Meaning
Consciously and intentionally; on purpose.
Example
The actions were deliberately planned to cause harm.
这些行动是故意计划的，以造成伤害。
B2 verb /ˈdɛvəˌsteɪt/

devastate

摧毁
Meaning
to cause severe and overwhelming destruction or damage
Example
The hurricane devastated the coastal town.
飓风摧毁了海岸城镇。
B2 verb /ˌdɪskəˈnɛkt/

disconnect

Meaning
to detach or separate from a connection or source
Example
Please disconnect the charger from the power outlet.
B2 adjective /dɪˈstɪŋkt/

Distinct

独特的; 独一无二的; 清晰的; 可识别的
Meaning
separate and different; clear and recognizable; unique
Example
Each painting has its own distinct style and character.
每幅画都有自己独特的风格和特点。
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。
B2 noun dɪˈstrækʃən

distraction

分心
Meaning
Something that prevents concentration or takes attention away from something else.
Example
Distraction during study time can hinder learning.
学习时的分心可能会阻碍学习。
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。
B2 noun /ˌdɪs.əˈbɪl.ə.ti/

Disability

残疾
Meaning
a physical or mental condition that limits a person's movements, senses, or activities
Example
Despite his physical disability, he became a successful athlete in wheelchair racing.
尽管他有身体残疾，他还是成为了轮椅赛车的成功运动员。
B2 noun, verb /ˈdeɪ.bjuː/

debut

首演
Meaning
The first public appearance or performance of someone or something.
Example
The young actor made his debut on the big stage.
年轻演员在大舞台上首次亮相。
B2 noun /duːm/

doom

厄运
Meaning
A terrible fate, destruction, or unavoidable bad outcome.
Example
The ancient prophecy foretold the city’s doom.
古老的预言预示了这座城市的厄运。
B2 verb /ˌdɪsəˈpruːv/

disapprove

不赞成
Meaning
to have a negative opinion about something; to consider something wrong or bad
Example
Many parents disapprove of smoking.
许多父母不赞成吸烟。
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.
B2 noun /daɪm/

dime

十分硬币
Meaning
a small coin, especially a U.S. coin worth ten cents
Example
He gave me a dime for the phone call.
他给了我一枚十分硬币用于打电话。
B2 noun daɪˈvɜːsɪti

diversity

多样性
Meaning
The state of being diverse; variety.
Example
Biodiversity promotes ecosystem stability and resilience.
生物多样性促进了生态系统的稳定性和恢复力。
B2 adjective /dɪˈpɛndəbl/

dependable

可靠的
Meaning
able to be trusted or relied on; consistently reliable
Example
She is a dependable colleague who always meets deadlines.
她是一位可靠的同事，总是按时完成任务。
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 noun /dɔːn/

Dawn

黎明
Meaning
the first appearance of light in the sky before sunrise; the beginning or start of something
Example
The fishermen set out to sea before dawn to catch the morning tide.
渔民们在黎明前出海，赶上早潮。
B2 adjective /ˈdespərət/

Desperate

绝望
Meaning
reckless; extremely urgent; critical
Example
The situation became desperate as water supplies ran out.
当水源耗尽时，情况变得绝望。
B2 noun /ˈdaʊn.fɔːl/

Downfall

衰退; 失败; 毁灭
Meaning
a loss of power, prosperity, or status; the cause of such a loss
Example
His arrogance and pride led to his eventual downfall in business.
他的傲慢和自豪导致了他在生意中的最终失败。
B2 noun /dɪˈpen.dənt/

Dependent

依赖; 被抚养人
Meaning
a person who relies on another for financial support; someone who depends on others
Example
As a tax dependent, she could not file her own tax return separately.
作为税务依赖人，她无法单独提交自己的税表。
B2 adverb /ˈden.sli/

densely

密集地
Meaning
In a closely compacted or crowded manner.
Example
The area is densely covered with trees.
这个区域密集地覆盖着树木。
B2 adjective /dɪˈsɛndənt/

descendent

下降的
Meaning
Moving downward; going down or descending.
Example
The river followed a descendent course toward the valley.
河流沿着向下的河道朝着山谷流去。
B2 noun /dɪˈfɛndər/

defender

防守者
Meaning
a person who protects someone or something from harm or attack
Example
The defender blocked the shot and saved the goal.
防守者挡住了射门并拯救了进球。
B2 noun /ˌdek.ləˈreɪ.ʃən/

Declaration

声明; 宣告; 公告
Meaning
a formal or explicit statement or announcement; an official proclamation
Example
The president's declaration of independence marked a historic moment for the nation.
总统的独立宣言标志着国家历史性的时刻。
B2 noun /dʌv/

Dove

鸽子
Meaning
a small, gentle bird with soft cooing sounds, often white and symbolizing peace
Example
The white dove flew peacefully across the blue sky.
白鸽平静地飞翔在蓝天上。
B2 adjective /ˈded.li/

Deadly

致命的; 死亡的; 危险的
Meaning
causing or able to cause death; extremely dangerous; lethal
Example
The deadly poison killed the plant instantly.
致命的毒药立即杀死了这株植物。
B2 noun /ˈdʌbəl ˈdekər/

Double decker

双层巴士
Meaning
a bus with two levels or floors for passengers
Example
The red double decker bus is a famous symbol of London.
红色的双层巴士是伦敦的一个著名象征。
B2 noun /ˈdræɡ.ən.flaɪ/

Dragon-fly

蜻蜓
Meaning
a large insect with four transparent wings that lives near water
Example
The dragonfly hovered over the pond.
蜻蜓在池塘上方盘旋。
B2 verb /dæʃ/

dash

Meaning
to move quickly and suddenly; to strike or break something violently
Example
She dashed across the street to catch the bus.
B2 noun /ˈdɛnɪmz/

denims

牛仔布裤
Meaning
pants or clothes made from denim fabric, usually jeans
Example
He wore blue denims with a white shirt.
他穿着蓝色牛仔裤和白衬衫。
B2 verb /dɪˈspaɪz/

despise

鄙视
Meaning
to regard with contempt; to hate strongly
Example
She despises dishonesty in all its forms.
她鄙视所有形式的不诚实。
B2 noun ডিজিটাল ডিটক্স

digital detox

数字排毒
Meaning
A period of time during which a person refrains from using electronic devices such as smartphones or computers, regarded as an opportunity to reduce stress or focus on social interaction in the physical world.
Example
A digital detox can help reduce hand fatigue.
数字排毒有助于减轻手部疲劳。
B2 noun /ˌdɪsəˈɡriːmənt/

disagreement

分歧
Meaning
a failure to agree or a difference in opinion
Example
Their disagreement on the issue caused a delay in the project.
他们在这个问题上的分歧导致了项目的延迟。
B2 noun /dɪˈstɪŋk.ʃən/

Distinction

优异; 卓越; 荣誉
Meaning
a difference or contrast between similar things; excellence that sets someone apart; honor or recognition
Example
She graduated with distinction, earning the highest honors in her class.
她以优异的成绩毕业，获得了班级最高荣誉。
B2 verb /dreɪn/

drain

Meaning
to cause liquid to flow away from something; to remove liquid
Example
He drained the pasta before adding the sauce.
B2 verb /ˈdæzəl/

dazzle

使目眩
Meaning
to impress deeply or blind with brilliance or skill
Example
The magician's tricks dazzled the audience.
魔术师的把戏使观众眼花缭乱。
B2 verb /dwel/

dwell

居住
Meaning
to live in a place; to think about something for a long time
Example
They dwell in a small cottage by the lake.
他们住在湖边的一座小屋里。
B2 noun /dɪsˈrʌp.ʃən/

disruption

中断
Meaning
Barrier or interruption, sudden disturbance in any process or service.
Example
The road construction caused major disruption in traffic flow.
道路建设导致交通流量的大规模中断。
B2 noun /ˈdɛpjʊti/

deputy

代理人
Meaning
A person appointed as a substitute with power to act.
Example
The deputy will lead the meeting in the manager’s absence.
代理人在经理缺席时将主持会议。
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。
B2 verb /dɪˈtætʃ/

detach

分开
Meaning
to separate or remove something from something else
Example
She detached the page from the notebook.
她从笔记本上撕下了那一页。
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。
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。
B2 adjective /ˈdaʊt.fəl/

Doubtful

怀疑的; 不确定的; 对某事感到不确定
Meaning
uncertain; questionable; feeling uncertain about something
Example
I am doubtful about the success of this project.
我对这个项目的成功表示怀疑。
B2 noun /dɪˈdʌk.ʃən/

deduction

推理
Meaning
The process of reaching a conclusion through logical reasoning.
Example
His deduction from the evidence was accurate.
他的推理基于证据是准确的。
B2 noun /dɪˈstrækʃənz/

distractions

干扰
Meaning
Things that prevent someone from concentrating on something else.
Example
Eliminate distractions for better productivity.
消除干扰以提高生产力。
B2 verb /drɪp/

drip

滴落
Meaning
to fall or let fall in drops
Example
Water was dripping from the broken pipe.
水从破裂的管道中滴下来。
B2 noun ˌdedɪˈkeɪʃn

dedication

奉献
Meaning
The quality of being dedicated or committed to a task or purpose; devotion.
Example
His dedication laid the foundation of Indian science.
他的奉献为印度科学奠定了基础。
B2 verb, noun /dɒn/

don

穿上 / 领袖
Meaning
to put on (an article of clothing); also used as a title for a respected person
Example
She donned her coat before leaving.
她在离开前穿上了外套。
B2 adjective /dɪˈvɔːrst/

divorced

离婚
Meaning
No longer married because the marriage has been legally dissolved.
Example
She has been divorced for five years.
她已经离婚五年了。
B2 adjective /ˈdred.fəl/

Dreadful

可怕的; 恐怖的; 可憎的
Meaning
extremely bad or unpleasant; causing fear or suffering; terrible
Example
The weather was dreadful during our vacation.
假期期间，天气很可怕。
B2 adjective /ˌdɪsəˈbiːdiənt/

Disobedient

不服从的
Meaning
refusing to obey rules or authority; rebellious
Example
The disobedient child refused to follow the rules.
不听话的孩子拒绝遵守规则。
B2 verb /dɪsˈkɑːrd/

discard

丢弃
Meaning
to throw away something that is no longer needed
Example
She decided to discard the old clothes.
她决定丢弃旧衣服。
B2 noun /djuː/

Dew

露水
Meaning
tiny drops of water that form on cool surfaces at night when atmospheric water vapour condenses
Example
The morning dew glistened on the grass.
早晨的露珠在草地上闪闪发光。
B2 verb /daɪˈdʒest/

digest

消化
Meaning
to break down food in the body; to think about and understand
Example
It takes time to digest a heavy meal.
要花时间消化一顿丰盛的饭菜。
B2 noun daɪˈlem.ə

dilemma

困境, 难题
Meaning
A situation in which a difficult choice has to be made between two or more alternatives.
Example
She faced a moral dilemma at work.
她在工作中面临道德困境。
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。
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 adjective /ˌdɪsəˈɡriːəbl/

disagreeable

令人不悦
Meaning
Unpleasant or offensive; causing discomfort or annoyance.
Example
The weather was cold and disagreeable.
天气寒冷且令人不悦。
B2 adjective /ˈdʌsti/

dusty

满是灰尘的
Meaning
covered with or full of dust; dry and dull from lack of moisture or use
Example
The old bookshelf was dusty after years of neglect.
多年无人打理后，这个旧书架满是灰尘。
B2 verb /dɪˈpɪkt/

depict

Meaning
to represent or show something in a picture, story, or other art form
Example
The painting depicts a beautiful sunset over the sea.
B2 noun /dɪˈsep.ʃən/

Deception

欺骗
Meaning
the action of deceiving someone; the state of being deceived
Example
The magician's deception amazed the audience with seemingly impossible tricks.
魔术师的欺骗让观众对看似不可能的魔法惊讶不已。
B2 noun /dɪsˈɡaɪz/

Disguise

伪装; 掩饰
Meaning
a means of altering one's appearance to conceal one's identity; something that hides the truth
Example
The spy wore an elaborate disguise to avoid being recognized by enemies.
间谍穿着精心设计的伪装，以避免被敌人认出。
B2 noun /ˌdɪsɪnˈfɛktənt/

disinfectant

消毒剂
Meaning
a chemical substance used to kill harmful microorganisms on surfaces
Example
The cleaner sprayed disinfectant on the table.
清洁工在桌子上喷洒了消毒剂。
B2 adjective /dɪm/

Dim

昏暗; 光线微弱; 微弱
Meaning
not bright; having little light; faint
Example
The room was dim with only a small candle for light.
房间昏暗，只有一只小蜡烛提供光线。
B2 noun /ˈdiː.fekt/

Defect

缺陷
Meaning
a shortcoming, imperfection, or lack; a fault or flaw in something
Example
The manufacturing defect caused the product to fail after only one week.
生产缺陷导致产品在仅仅一周后就失败了。
B2 noun /ˈdʌklɪŋ/

duckling

Meaning
a young duck
Example
The mother duck led her ducklings to the pond.
B2 noun draʊt

drought

干旱
Meaning
A prolonged period of abnormally low rainfall; a shortage of water.
Example
Drought impacts crop growth significantly.
干旱显著影响农作物的生长。
B2 adjective /dɪˈzæs.trəs/

Disastrous

灾难性的
Meaning
extremely bad or unsuccessful; causing great damage
Example
The hurricane had disastrous effects on the city.
飓风对城市造成了灾难性的影响。
B2 verb /draʊn/

drown

溺水
Meaning
to die or cause to die by being submerged in and inhaling water
Example
He nearly drowned while swimming in the river.
他在河里游泳时差点淹死。
B2 verb /doʊz/

doze

打盹
Meaning
To sleep lightly for a short time.
Example
He dozed off while reading the book.
他在读书时打了个盹。
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 verb /dɪˈspætʃ/

dispatch

派遣
Meaning
to send off to a destination or for a purpose
Example
The company dispatched aid to the flood victims.
公司向洪水受害者派遣了援助。
B2 verb /ˈdɛdɪkeɪt/

dedicate

奉献
Meaning
to devote time, effort, or oneself to a particular purpose or person
Example
She dedicated her life to helping the poor.
她献出了自己的生命来帮助穷人。
B2 noun, verb /ˈdɪskɔːrs/

discourse

讲座, 辩论
Meaning
Written or spoken communication or debate.
Example
The professor gave a discourse on ancient philosophy.
教授进行了关于古代哲学的讲座。
B2 verb /dɪsˈtʃɑːrdʒ/

discharge

出院
Meaning
to release or dismiss from duty; to emit or give off
Example
The hospital will discharge the patient tomorrow.
医院明天将出院病人。
B2 adjective /dɪˈfɪnɪtɪv/

definitive

决定性
Meaning
serving as a final or most authoritative form; conclusive and decisive
Example
The committee reached a definitive agreement on the policy.
委员会就政策达成了决定性协议。
B2 noun /dɪˌskrɪm.ɪˈneɪ.ʃən/

Discrimination

歧视; 不公正待遇; 偏见
Meaning
the unjust or prejudicial treatment of different categories of people; recognition of difference
Example
The company was sued for racial discrimination in their hiring practices.
该公司因其招聘中存在种族歧视而被起诉。
B2 adjective /dɪˈtætʃt/

detached

分离的, 疏远的
Meaning
separate or disconnected; showing a lack of emotional involvement
Example
He lived in a detached house away from the city.
他住在远离城市的分离房子里。
B2 noun /dɪˈstɜː.bəns/

Disturbance

干扰; 打扰; 不安
Meaning
the interruption of a settled and peaceful condition; anxiety or mental uneasiness
Example
The loud music created a disturbance that bothered all the neighbors.
大声的音乐制造了一个干扰，打扰了所有邻居。
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。
B2 noun /dɪsˈpoʊzl/

disposal

处置
Meaning
the action or process of getting rid of something
Example
The disposal of waste is crucial for maintaining a clean environment.
废物处理对于保持清洁的环境至关重要。
B2 adjective /dɪˈvaɪn/

Divine

神圣的; 天上的; 类似神的; 与上帝或神灵有关
Meaning
heavenly; sacred; godlike; relating to God or a deity
Example
The divine beauty of the sunset took their breath away.
夕阳的神圣美景让他们屏息凝视。
B2 noun /dɪˌtɜː.mɪˈneɪ.ʃən/

determination

决心
Meaning
Firmness of purpose; the quality of being determined; resolve.
Example
His determination to succeed was unwavering.
他为了成功的决心坚定不移。
B2 noun /ˈdiːmən/

demon

恶魔
Meaning
an evil spirit or devil
Example
The story was about a demon who haunted the village.
这个故事是关于一个困扰村庄的恶魔。
B2 noun /dwɔːrf/

dwarf

矮人
Meaning
a person, animal, or plant much smaller than average
Example
Snow White lived with seven dwarfs.
白雪公主与七个矮人一起生活。
B2 noun /ˌdel.ɪˈɡeɪ.ʃən/

delegation

代表团
Meaning
A group of people chosen to represent others in negotiations or discussions.
Example
The delegation presented their country's agenda.
代表团提出了他们国家的议程。
B2 noun /dɪˈkeɪ/

Decay

腐烂; 分解; 衰退
Meaning
the process of rotting or decomposing; gradual decline or deterioration
Example
The old building showed signs of decay after years of neglect.
这座老建筑在多年疏忽后显示出腐烂的迹象。
B2 adjective /dɪˈfektɪv/

Defective

有缺陷的; 不完整的
Meaning
having faults or defects; imperfect
Example
The defective product was returned to the store.
有缺陷的产品被退还到商店。
B2 noun /dɪsˈɔːrdər/

disorder

紊乱
Meaning
A state of confusion or lack of order; also a medical or mental condition.
Example
The protest ended in disorder when the crowd became violent.
抗议活动在群众变得暴力后陷入了混乱。
B2 verb /ˌdaɪəɡˈnoʊz/

diagnose

诊断
Meaning
To identify a disease, condition, or problem by examining symptoms.
Example
The doctor diagnosed him with pneumonia.
医生诊断出他患有肺炎。
B2 verb /dɪˈfaɪ/

defy

反抗
Meaning
to openly resist or refuse to obey someone or something; to challenge or dare someone to do something
Example
The protesters continued to defy the government's ban on public gatherings.
抗议者继续挑战政府对公共集会的禁令。
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。
B2 adjective /dɪˈskʌr.ɪ.dʒɪŋ/

Discouraging

令人沮丧的
Meaning
making someone feel less confident or enthusiastic about doing something
Example
The coach's discouraging words affected the team's morale.
教练的令人沮丧的话语影响了球队的士气。
B2 noun /droʊn/

Drone

雄性蜜蜂
Meaning
a male bee that does not work and whose only function is to mate with the queen
Example
The drone bees do not collect honey like worker bees.
这些雄性蜜蜂不会像工蜂一样采蜜。
B2 noun /ˌdaɪəˈbiːtiːz/

diabetes

幸福
Meaning
a medical condition in which the body cannot properly control the level of sugar in the blood
Example
He was diagnosed with type 2 diabetes last year.
她收到奖项时，无法掩饰自己的幸福。
B2 adjective /ˈdɛntəl/

dental

牙科的
Meaning
relating to teeth or dentistry
Example
She goes for a dental checkup every six months.
她每六个月进行一次牙科检查。
B2 noun /doʊs/

dose

剂量
Meaning
a measured amount of a medicine or drug taken at one time
Example
The doctor prescribed one dose of the medicine every six hours.
医生每六小时开一次药物的剂量。
B2 verb dɪˈtɪrɪəˌreɪts

deteriorates

恶化
Meaning
To become progressively worse; to decline in quality, condition, or strength.
Example
The quality of air deteriorates due to pollution.
因污染，空气质量正在恶化。