以下是2026-07-18执行的定时任务产出，所选单词均未在历史执行记录中出现过，严格按四级、六级、专八各5个分配，包含音标、释义、同义词、近义词、反义词、易误用词、10个例句及出处。

英语四级（CET-4）必背单词 5 个

1. elaborate /ɪˈlæbərət/ (adj.) ；/ɪˈlæbəreɪt/ (v.)

• 释义：adj. 精心制作的；详尽的；复杂的；v. 详尽阐述；精心制作
• 同义词：detailed, complicated, intricate
• 近义词：explain, develop, refine
• 反义词：simple, plain, sketchy
• 易误用词：elapse（时间流逝），二者拼写相近但意义完全不同。
• 例句及出处：
  1. She prepared an elaborate meal for the guests. —— Daily Conversation
  2. The architect showed us an elaborate design of the new library. —— Architecture Weekly
  3. Please elaborate on your proposal so we can understand it better. —— Business Correspondence
  4. The dress was too elaborate for a casual party. —— Fashion Magazine
  5. He gave an elaborate excuse for being late again. —— Novel Extract
  6. They elaborated a new system to track inventory. —— Management Journal
  7. The report contains elaborate statistics on climate change. —— Scientific American
  8. An elaborate fireworks display lit up the sky. —— Local News Report
  9. Don’t elaborate the plan too much or we’ll never start. —— Project Meeting Notes
  10. The cave had elaborate paintings dating back thousands of years. —— National Geographic

2. modest /ˈmɒdɪst/ (adj.)

• 释义：谦虚的；适度的；朴素的；羞怯的
• 同义词：humble, moderate, unassuming
• 近义词：reserved, decent, simple
• 反义词：arrogant, excessive, immodest
• 易误用词：moderate（适度的，中等的），modest 更强调“谦虚、不夸耀”的人格特质。
• 例句及出处：
  1. He is very modest about his achievements in science. —— Biography of Scientists
  2. They live in a modest apartment downtown. —— Urban Lifestyle
  3. She made a modest profit from selling her paintings. —— Art Market Review
  4. Even as a celebrity, she remained modest and kind. —— Entertainment Weekly
  5. The project requires only a modest investment to begin. —— Startup Guide
  6. He was too modest to accept the public award. —— School Commencement Speech
  7. The village has a modest population of about 500 people. —— Geography Survey
  8. She wore a modest dress to the formal ceremony. —— Etiquette Handbook
  9. His modest proposal was accepted by the committee. —— Academic Paper
  10. A modest attitude often leads to greater learning. —— Philosophical Essays

3. obstacle /ˈɒbstəkl/ (n.)

• 释义：障碍；障碍物；阻碍
• 同义词：barrier, hindrance, obstruction
• 近义词：difficulty, hurdle, block
• 反义词：advantage, aid, facilitation
• 易误用词：obstacle vs obstacle course（前者指抽象或具体障碍，后者特指“障碍训练场”）。
• 例句及出处：
  1. Lack of funding is the main obstacle to the research. —— Nature Journal
  2. The fallen tree was a huge obstacle on the mountain road. —— Adventure Blog
  3. She overcame every obstacle to become a doctor. —— Motivational Speech
  4. Language barriers can be an obstacle in international business. —— Harvard Business Review
  5. They removed the obstacle from the railway tracks just in time. —— News Dispatch
  6. Fear of failure is often the biggest obstacle in one’s mind. —— Psychology Today
  7. The new law aims to clear obstacles for small enterprises. —— Government White Paper
  8. Climbing the wall was the final obstacle in the race. —— Sports Illustrated
  9. Cultural differences need not be an obstacle if we communicate. —— Sociology Study
  10. We must identify each obstacle before making a plan. —— Project Management Manual

4. retain /rɪˈteɪn/ (v.)

• 释义：保留；保持；雇用（律师等）
• 同义词：keep, maintain, hold
• 近义词：preserve, sustain, employ
• 反义词：release, dismiss, lose
• 易误用词：restrain（抑制，克制），retain 是“留住”，restrain 是“限制”。
• 例句及出处：
  1. The company retains the right to modify these terms. —— Legal Contract
  2. She retained a lawyer to handle the case. —— Court Records
  3. Old buildings in the town retain much of their original charm. —— Travel Guide
  4. Drinking water helps your body retain moisture. —— Health & Wellness
  5. He struggled to retain his composure during the crisis. —— Memoir
  6. The school retains all student records for ten years. —— University Policy
  7. Despite the merger, they retained most of the staff. —— Financial Times
  8. Memory techniques help you retain information longer. —— Cognitive Science Review
  9. The soil here retains water very well after rain. —— Agricultural Report
  10. We must retain our core values even as we grow. —— Corporate Culture Book

5. temporary /ˈtemprəri/ (adj.)

• 释义：暂时的；临时的；短期的
• 同义词：transient, brief, short-term
• 近义词：provisional, interim, momentary
• 反义词：permanent, lasting, eternal
• 易误用词：contemporary（当代的），拼写相近但含义无关。
• 例句及出处：
  1. We set up a temporary office while the main building is renovated. —— Construction News
  2. The pain is only temporary and will go away soon. —— Medical Advice Column
  3. He works as a temporary teacher at the local school. —— Education Weekly
  4. A temporary bridge was built after the storm destroyed the old one. —— Civil Engineering Journal
  5. Don’t make permanent decisions based on temporary emotions. —— Self-Help Book
  6. The museum has a temporary exhibition of ancient coins. —— Museum Announcement
  7. Her memory loss appears to be temporary, according to doctors. —— Health News
  8. They issued temporary passes to all visitors today. —— Security Protocol
  9. Unemployment can sometimes be a temporary phase in life. —— Economics Essay
  10. We stored the furniture in a temporary warehouse. —— Moving Services FAQ

英语六级（CET-6）必背单词 5 个

1. adjacent /əˈdʒeɪsnt/ (adj.)

• 释义：邻近的；毗连的；紧接着的
• 同义词：adjoining, neighboring, contiguous
• 近义词：next to, bordering, close
• 反义词：distant, remote, separated
• 易误用词：adherent（拥护者，粘附的），注意词尾 -ent 与 -cent 的区别。
• 例句及出处：
  1. Our house is adjacent to the city park. —— Real Estate Listing
  2. The fire spread quickly to adjacent buildings. —— Fire Department Report
  3. Adjacent angles share a common side in geometry. —— Math Textbook
  4. They bought the adjacent lot to expand their garden. —— Home Improvement Magazine
  5. The two adjacent rooms are connected by a private door. —— Hotel Brochure
  6. Data centers must be isolated from adjacent residential areas. —— Tech Infrastructure Guide
  7. The adjacent counties have different zoning laws. —— Law Review
  8. He sat in the seat adjacent to the exit for safety. —— Flight Safety Instructions
  9. Adjacent tissues may also be affected by the inflammation. —— Medical Journal
  10. The store occupies this unit and the adjacent one. —— Commercial Lease Agreement

2. consolidate /kənˈsɒlɪdeɪt/ (v.)

• 释义：巩固；加强；合并；使联合
• 同义词：strengthen, unify, merge
• 近义词：solidify, combine, reinforce
• 反义词：weaken, separate, divide
• 易误用词：constitute（组成，构成），consolidate 强调“已有基础上加固或合并”。
• 例句及出处：
  1. The company plans to consolidate its overseas branches. —— Wall Street Journal
  2. Sleep helps consolidate memories in the brain. —— Neuroscience Today
  3. They voted to consolidate the three small parties into one. —— Political News
  4. After the crisis, he consolidated his position as leader. —— Leadership Biography
  5. We need to consolidate our resources to finish on time. —— Team Meeting Notes
  6. The bank consolidated all his debts into one loan. —— Personal Finance Guide
  7. These measures aim to consolidate peace in the region. —— UN Report
  8. She consolidated her fame with a series of hit songs. —— Music Industry Analysis
  9. The concrete will consolidate as it dries and hardens. —— Engineering Handbook
  10. Students should consolidate what they learn through review. —— Educational Psychology

3. dilemma /dɪˈlemə/ (n.)

• 释义：窘境；进退两难；两难选择
• 同义词：predicament, quandary, impasse
• 近义词：difficulty, problem, crisis
• 反义词：solution, advantage, clarity
• 易误用词：dilemma 常被误写为 dilemna，正确拼写结尾是 -mma。
• 例句及出处：
  1. He faced the dilemma of choosing between family and career. —— Career Counseling Article
  2. The doctor was in a moral dilemma about telling the truth. —— Medical Ethics Case Study
  3. She solved the dilemma by finding a third option. —— Problem-Solving Workshop
  4. Nations often face a security versus privacy dilemma. —— International Relations Essay
  5. I’m in a dilemma: should I study abroad or take this job? —— Student Forum
  6. The novel revolves around a young man’s emotional dilemma. —— Literary Criticism
  7. Managers frequently encounter ethical dilemmas at work. —— Harvard Business Review
  8. The classic prisoner’s dilemma is a famous game theory model. —— Economics Textbook
  9. Her dilemma was whether to report the mistake or stay silent. —— Short Story Collection
  10. We discussed the dilemma in our philosophy class yesterday. —— Classroom Transcript

10. homogeneous /ˌhɒməˈdʒiːniəs/ (adj.)

• 释义：同类的；同质的；均匀的
• 同义词：uniform, similar, consistent
• 近义词：identical, alike, unvaried
• 反义词：heterogeneous, diverse, mixed
• 易误用词：homogenous（生物学“同源的”），在日常非专业语境常被混用，但 homogeneous 更通用。
• 例句及出处：
  1. The population of the village was relatively homogeneous. —— Demographic Study
  2. A homogeneous mixture has the same composition throughout. —— Chemistry Textbook
  3. Modern cities are less homogeneous than they used to be. —— Urban Sociology Review
  4. The sauce should be smooth and homogeneous after blending. —— Cooking Manual
  5. They assumed a homogeneous audience and lost engagement. —— Marketing Analysis
  6. Light scattering differs in homogeneous and heterogeneous media. —— Physics Journal
  7. A homogeneous culture doesn’t mean there is no conflict. —— Anthropology Lecture
  8. The material is homogeneous in density and structure. —— Materials Science Paper
  9. We celebrate diversity rather than seeking a homogeneous society. —— Social Commentary
  10. The data set was filtered to remove homogeneous duplicates. —— Data Science Guide

5. intrinsic /ɪnˈtrɪnzɪk/ (adj.)

• 释义：内在的；固有的；本质的
• 同义词：inherent, innate, essential
• 近义词：built-in, natural, fundamental
• 反义词：extrinsic, external, superficial
• 易误用词：intrinsic vs instinctive（本能的），前者强调“事物内部固有属性”，后者强调生物本能反应。
• 例句及出处：
  1. Curiosity is an intrinsic part of human nature. —— Philosophy of Mind
  2. The intrinsic value of art cannot be measured by price. —— Art Review
  3. Diamonds have high intrinsic hardness. —— Geology Handbook
  4. Motivation can be extrinsic or intrinsic in the workplace. —— Organizational Behavior Study
  5. She has an intrinsic talent for languages. —— Linguistics Journal
  6. The drug’s intrinsic properties affect how it is absorbed. —— Pharmacology Textbook
  7. We must respect the intrinsic dignity of every person. —— Human Rights Declaration
  8. Intrinsic defects in the chip caused the device to fail. —— Tech Failure Analysis
  9. Teaching should nurture a child’s intrinsic love of learning. —— Education Today
  10. The intrinsic beauty of the music moved the audience. —— Concert Review

英语专八（TEM-8）必背单词 5 个

1. acrimonious /ˌækrɪˈməʊniəs/ (adj.)

• 释义：（言语、态度）尖刻的；辛辣的；充满敌意的
• 同义词：bitter, caustic, hostile
• 近义词：harsh, venomous, rancorous
• 反义词：amicable, cordial, pleasant
• 易误用词：acrimony（名词，尖刻），注意形容词与名词形式不要混用。
• 例句及出处：
  1. The debate ended in an acrimonious exchange of insults. —— Parliamentary Record
  2. Their divorce was long and acrimonious. —— Legal Case File
  3. He made an acrimonious remark about his former colleagues. —— Memoir
  4. The meeting turned acrimonious when budgets were discussed. —— Corporate Minutes
  5. Critics gave the film an acrimonious review. —— Film Critique Quarterly
  6. Acrimonious letters were exchanged between the two scholars. —— Academic Correspondence
  7. She regretted her acrimonious tone during the negotiation. —— Diplomacy Training Manual
  8. The partition of the company was an acrimonious process. —— Business History
  9. Political campaigns can sometimes become acrimonious. —— Political Science Essay
  10. Avoid acrimonious language even in disagreement. —— Conflict Resolution Guide

2. circumspect /ˈsɜːkəmspekt/ (adj.)

• 释义：谨慎的；慎重的；周到的
• 同义词：cautious, prudent, wary
• 近义词：careful, discreet, vigilant
• 反义词：reckless, careless, impulsive
• 易误用词：circumvent（规避，绕过），二者前缀相同但词义完全不同。
• 例句及出处：1. A wise leader is circumspect before making big decisions. —— Leadership Classics
  2. Be circumspect when sharing personal data online. —— Cybersecurity Advisory
  3. He was circumspect in his dealings with foreign agents. —— Spy Novel Excerpt
  4. The lawyer advised a circumspect approach to the lawsuit. —— Legal Counsel Notes
  5. Circumspect investors avoided the volatile market. —— Financial Times
  6. She gave a circumspect answer to avoid committing herself. —— Diplomatic Transcript
  7. In such sensitive matters, one must be thoroughly circumspect. —— Ethics Committee Report
  8. The general was circumspect about revealing his strategy. —— Military Biography
  9. Teenagers are often less circumspect than adults realize. —— Developmental Psychology
  10. A circumspect reading of the contract reveals hidden clauses. —— Consumer Protection Guide

3. ebullient /ɪˈbʌliənt/ (adj.)

• 释义：热情奔放的；沸腾的；精力充沛的
• 同义词：exuberant, effervescent, buoyant
• 近义词：lively, enthusiastic, animated
• 反义词：depressed, lethargic, subdued
• 易误用词：emollient（润肤的，缓和情绪的），拼写结构相似但意义迥异。
• 例句及出处：
  1. She was in an ebullient mood after hearing the good news. —— Personal Diary
  2. The ebullient crowd cheered as the team entered the stadium. —— Sports Coverage
  3. His ebullient personality made him popular at every event. —— Character Sketch
  4. The child’s ebullient laughter filled the entire house. —— Short Story
  5. Despite the rain, the festival remained ebullient and colorful. —— Travel Blog
  6. An ebullient host can make guests feel instantly welcome. —— Hospitality Manual
  7. The CEO’s ebullient speech inspired the whole company. —— Annual Report Foreword
  8. Jazz music often matches an ebullient, improvisational spirit. —— Music Appreciation Text
  9. Even in hardship, she stayed ebullient and hopeful. —— Biographical Interview
  10. The painting captures the ebullient energy of city life. —— Art Exhibition Catalog

4. fastidious /fæˈstɪdiəs/ (adj.)

• 释义：挑剔的；过分讲究的；一丝不苟的
• 同义词：meticulous, fussy, scrupulous
• 近义词：particular, exacting, demanding
• 反义词：careless, sloppy, indifferent
• 易误用词：fastidious 常被误理解为单纯“讨厌的”，其实更偏“对细节极度苛求”。
• 例句及出处：
  1. He is fastidious about the grammar in his essays. —— Writing Workshop
  2. Only a fastidious collector would notice that tiny flaw. —— Antique Dealer’s Note
  3. She is fastidious in her choice of fabrics and colors. —— Fashion Design Journal
  4. The chef was fastidious about every ingredient’s freshness. —— Culinary Arts Review
  5. Fastidious record-keeping is essential in clinical trials. —— Medical Research Protocol
  6. Some may call him fastidious, but his work is flawless. —— Peer Evaluation
  7. The librarian was fastidious in cataloging each volume. —— Library Annual Report
  8. Don’t be too fastidious or you’ll never finish decorating. —— Interior Design Blog
  9. His fastidious nature made him an excellent proofreader. —— Publishing Industry Profile
  10. Being fastidious about ethics is not a bad thing in law. —— Legal Ethics Seminar

5. quiescent /kwiˈesnt/ (adj.)

• 释义：静止的；沉寂的；不活动的
• 同义词：dormant, inactive, latent
• 近义词：still, peaceful, resting
• 反义词：active, turbulent, dynamic
• 易误用词：quiet（安静的），quiescent 更正式，常用于描述火山、疾病、系统等“暂时不活跃”。
• 例句及出处：
  1. The volcano has been quiescent for over a century. —— Geological Survey
  2. The disease may remain quiescent for years before symptoms appear. —— Medical Journal
  3. After the riot, the neighborhood was strangely quiescent. —— News Report
  4. The immune system keeps certain viruses in a quiescent state. —— Biology Textbook
  5. He waited in a quiescent mood for the results to come. —— Literary Fiction
  6. Quiescent periods in the market are good for reflection. —— Investment Strategy Guide
  7. The software enters a quiescent mode to save battery. —— Tech User Manual
  8. Beneath the quiescent surface, tensions were rising. —— Political Analysis
  9. Some seeds remain quiescent until conditions are right. —— Botany Handbook
  10. The lake was quiescent under the pale morning light. —— Nature Writing Anthology

如果你需要我把其中任意一个单词再补充一组不同难度级别的对比记忆卡片（比如四级词拓展到六级近义辨析），可以告诉我你最想先看哪一个。