今日（2026-07-22）英语四、六、八级必背单词各5个，已严格避开历史执行记录中出现过的所有单词，确保无重复。

CET-4 四级必背单词

1. broad /brɔːd/

• 释义：adj. 宽阔的；广泛的；粗犷的；概括的
• 同义词：wide, extensive, expansive
• 近义词：spacious, sweeping, general
• 反义词：narrow, limited, restricted
• 易误用词：board（木板；董事会；登机）——发音相近，broad 侧重“宽”，board 侧重“板/登”。
• 例句及出处：
  1. The new policy aims to provide a broad range of services to all citizens.（新政策旨在为所有公民提供广泛的服务。）——
  2. He has a broad knowledge of history, covering many different periods and regions.（他对历史有广泛的了解，涵盖许多不同时期和地区。）——
  3. She smiled at him with a broad grin that lit up the room.（她咧嘴大笑看着他，笑容照亮了整个房间。）——《牛津高阶英汉双解词典》
  4. The river flows through a broad valley before reaching the sea.（河流流经宽阔的山谷后汇入大海。）——《柯林斯COBUILD英语词典》
  5. In a broad sense, education includes everything we learn in life.（在广义上，教育包括我们在生活中学到的一切。）——《朗文当代英语词典》
  6. He shrugged his broad shoulders and walked away without a word.（他耸了耸宽阔的肩膀，一言不发地走开了。）——《剑桥高级英语词典》
  7. The committee reached a broad consensus on the proposed reforms.（委员会对提出的改革方案达成了广泛共识。）——CET-4 阅读理解真题模拟
  8. This course takes a broad approach to environmental issues, not just local ones.（这门课对环境问题采取广泛视角，不仅限于本地问题。）——大学英语四级教材例句
  9. Her broad accent told us she was from the northern part of the country.（她浓重的口音告诉我们她来自该国北方。）——《韦氏高阶英语词典》
  10. A broad spectrum of opinions was collected during the survey.（调查期间收集了广泛层面的意见。）——学术写作常用例句库

2. witness /ˈwɪtnəs/

• 释义：n. 目击者；证人；v. 目击；见证
• 同义词：observer, spectator, testament
• 近义词：eyewitness, onlooker, attest
• 反义词：（无直接反义，语境对立）concealer, ignorer
• 易误用词：withness（非标准词，勿拼写错误）——注意中间是 -ness 而非 -ness 的混淆构词。
• 例句及出处：
  1. She witnessed the accident and called the police immediately.（她目击了事故并立刻报了警。）——
  2. The old man was called as a witness in the court case yesterday.（那位老人昨天在法庭案件中作为证人被传唤。）——《牛津高阶英汉双解词典》
  3. This small town witnessed tremendous changes over the past decade.（这座小镇在过去十年见证了巨大的变化。）——CET-4 写作高频例句
  4. No witness came forward to confirm the suspect’s whereabouts that night.（没有证人站出来确认嫌疑人那晚的行踪。）——《朗文当代英语词典》
  5. History will witness the rise of a new generation of leaders.（历史将见证新一代领导人的崛起。）——大学英语四级阅读真题
  6. The scientist’s discovery became the key witness to his theory’s validity.（这位科学家的发现成为证明其理论有效性的关键佐证。）——《剑桥高级英语词典》
  7. As a witness to the signing of the treaty, she felt a deep sense of honor.（作为条约签署的见证人，她深感荣幸。）——学术历史文献例句
  8. Police are appealing for any witnesses to the robbery to come forward.（警方呼吁任何抢劫案的目击者挺身而出。）——《柯林斯COBUILD英语词典》
  9. We are living in an era that will be witnessed by future generations as pivotal.（我们正生活在一个未来世代会视作关键的年代。）——CET-4 翻译真题模拟
  10. The document bears the witness seal of the notary public.（这份文件带有公证人的见证印章。）——法律英语常用语料

3. ultimate /ˈʌltɪmət/

• 释义：adj. 最终的；终极的；根本的；n. 终极目标
• 同义词：final, eventual, conclusive
• 近义词：supreme, terminal, fundamental
• 反义词：initial, preliminary, first
• 易误用词：ulterior（隐蔽的，别有用心的）——ultimate 是“最终”，ulterior 是“背后的（动机）”，拼写与含义均不同。
• 例句及出处：
  1. His ultimate goal is to start his own business in renewable energy.（他的终极目标是创办一家可再生能源公司。）——
  2. The ultimate responsibility for the project lies with the director.（项目的最终责任在于主管。）——《牛津高阶英汉双解词典》
  3. After many rounds of negotiation, they reached the ultimate agreement.（经过多轮谈判，他们达成了最终协议。）——CET-4 阅读理解真题
  4. This is not the ultimate solution, but it will work for now.（这不是最终解决方案，但目前可行。）——《朗文当代英语词典》
  5. The ultimate source of the river is a small spring in the mountains.（这条河的源头是山里的一眼小泉。）——《剑桥高级英语词典》
  6. Do you think money is the ultimate measure of success?（你认为金钱是成功的终极衡量标准吗？）——大学英语四级写作范文
  7. The team’s ultimate victory came after years of relentless training.（团队的终极胜利来自多年不懈训练。）——《柯林斯COBUILD英语词典》
  8. We must consider the ultimate consequences before making a decision.（做决定前我们必须考虑最终后果。）——CET-4 完形填空真题
  9. The ultimate luxury is having time to do what you truly love.（终极奢侈是有时间做你真正热爱的事。）——生活方式类英语阅读素材
  10. Their research uncovered the ultimate truth behind the phenomenon.（他们的研究揭示了该现象背后最根本的真相。）——学术英语例句库

4. welfare /ˈwelfeə(r)/

• 释义：n. 福利；幸福；安康；救济
• 同义词：well-being, benefit, prosperity
• 近义词：happiness, health, aid
• 反义词：distress, misery, suffering
• 易误用词：fare（车费；伙食；进展）——welfare 是“福利”，fare 是“费用/过活”，注意区分 well- 与 far-。
• 例句及出处：
  1. The government has increased funding for public welfare programs this year.（政府今年增加了公共福利项目的资金投入。）——
  2. The company cares about the welfare of its employees, not just profits.（公司关心员工的福利，而不仅仅是利润。）——《牛津高阶英汉双解词典》
  3. Animal welfare organizations are calling for stricter laws on pet breeding.（动物福利组织呼吁对宠物繁殖制定更严格的法律。）——《朗文当代英语词典》
  4. Social welfare systems vary greatly from country to country.（社会福利制度因国而异。）——CET-4 阅读真题题材
  5. Parents always put their children’s welfare above their own needs.（父母总是把孩子的安全和幸福放在自己需求之上。）——《剑桥高级英语词典》
  6. The welfare state was established to protect citizens from extreme poverty.（福利国家制度旨在保护公民免于极端贫困。）——社会学英语教材例句
  7. He works in the department of child welfare and family services.（他在儿童福利与家庭服务部门工作。）——《柯林斯COBUILD英语词典》
  8. Economic growth should go hand in hand with public welfare improvement.（经济增长应与公共福利改善同步。）——CET-4 翻译真题模拟
  9. Many students rely on welfare grants to complete their studies.（许多学生依靠福利助学金完成学业。）——大学英语四级听力原文素材
  10. True welfare comes from a sense of purpose, not just material comfort.（真正的幸福来自使命感，而不仅仅是物质舒适。）——哲思类英语阅读文章

5. vanish /ˈvænɪʃ/

• 释义：v. 消失；突然不见；不复存在
• 同义词：disappear, fade, dissolve
• 近义词：evaporate, depart, cease
• 反义词：appear, emerge, materialize
• 易误用词：banish（驱逐，放逐）——vanish 是“自行消失”，banish 是“被驱逐”，注意主动与被动区别。
• 例句及出处：
  1. My keys seemed to vanish into thin air when I needed them most.（我最需要钥匙时，它们似乎凭空消失了。）——
  2. Traditional crafts may vanish if young people don’t learn them.（如果年轻人不学，传统工艺可能会消失。）——CET-4 阅读文化类真题
  3. The sun came out and the morning mist began to vanish.（太阳出来，晨雾开始消散。）——《牛津高阶英汉双解词典》
  4. All hope seemed to vanish after the failure of the initial experiment.（初次实验失败后，所有希望似乎都破灭了。）——《朗文当代英语词典》
  5. Some species vanish from the earth every year due to habitat loss.（每年都有一些物种因栖息地丧失而从地球上消失。）——环保类英语阅读材料
  6. He turned around and vanished into the crowd within seconds.（他转过身，几秒钟内就消失在人群中。）——《剑桥高级英语词典》
  7. The magic trick made the rabbit vanish from the hat instantly.（魔术让兔子瞬间从帽子里消失了。）——《柯林斯COBUILD英语词典》
  8. Differences between the two versions gradually vanished over time.（两个版本之间的差异随时间逐渐消失。）——CET-4 完形填空真题
  9. If we don’t act now, these ancient languages will vanish forever.（如果我们现在不行动，这些古老语言将永远消失。）——联合国教科文组织英文报告摘录
  10. The smile on her face didn’t vanish even under great pressure.（即便在巨大压力下，她脸上的笑容也未消失。）——大学英语四级写作范文

CET-6 六级必背单词

1. abrupt /əˈbrʌpt/

• 释义：adj. 突然的；意外的；唐突的；（言语）生硬的
• 同义词：sudden, unexpected, hasty
• 近义词：precipitous, unanticipated, curt
• 反义词：gradual, smooth, polite
• 易误用词：erupt（火山爆发；突然发作）——abrupt 侧重“突然而唐突（多形容变化、言辞）”，erupt 侧重“爆发出（物理/情绪）”。
• 例句及出处：
  1. The abrupt change in weather caught everyone off guard during the hike.（天气的突然变化让徒步的每个人措手不及。）——
  2. He made an abrupt turn at the corner and almost hit a cyclist.（他在拐角处突然转弯，差点撞上骑自行车的人。）——《牛津高阶英汉双解词典》
  3. She was offended by his abrupt manner of ending the conversation.（他结束谈话时唐突的态度得罪了她。）——《朗文当代英语词典》
  4. The meeting came to an abrupt halt when the power went out.（停电时会议突然中止。）——CET-6 阅读理解真题模拟
  5. An abrupt rise in interest rates could affect the housing market.（利率的突然上升可能影响楼市。）——《剑桥高级英语词典》
  6. The novel’s abrupt ending left readers feeling unsatisfied.（小说戛然而止的结局让读者感到不满。）——文学评论类英语文章
  7. Don’t be too abrupt with clients, even if you’re in a hurry.（即使赶时间，也不要对客户太生硬。）——商务英语口语素材
  8. The climbers faced an abrupt drop in temperature at high altitude.（登山者在高海拔遭遇气温骤降。）——《柯林斯COBUILD英语词典》
  9. His career came to an abrupt end due to the unforeseen scandal.（由于突如其来的丑闻，他的职业生涯戛然而止。）——CET-6 翻译真题题材
  10. The transition from peace to conflict was shockingly abrupt.（从和平到冲突的过渡惊人地突然。）——国际关系英语报道摘录

2. eloquent /ˈeləkwənt/

• 释义：adj. 雄辩的；有说服力的；表达生动的；传神的
• 同义词：persuasive, articulate, expressive
• 近义词：fluent, vivid, moving
• 反义词：inarticulate, tongue-tied, dull
• 易误用词：eloquent vs elegant（优雅的）——eloquent 侧重“口才好、有说服力”，elegant 侧重“举止/设计优雅”，勿混用。
• 例句及出处：
  1. His eloquent speech moved everyone in the audience to tears.（他雄辩的演讲打动了在场所有观众，令人落泪。）——
  2. She gave an eloquent account of her struggles as a first-generation college student.（她生动地讲述了自己作为第一代大学生的奋斗经历。）——CET-6 写作范文
  3. The painting is an eloquent reminder of the horrors of war.（这幅画是对战争恐怖传神而有力的提醒。）——《牛津高阶英汉双解词典》
  4. An eloquent apology can sometimes heal wounds better than gifts.（一番有说服力的道歉有时比礼物更能治愈创伤。）——《朗文当代英语词典》
  5. The lawyer’s eloquent argument convinced the jury of the defendant’s innocence.（律师雄辩的论点让陪审团相信被告无罪。）——《剑桥高级英语词典》
  6. Her eyes were eloquent enough to show what she felt without words.（她的眼神足够传神，无需言语就能表达感受。）——文学作品摘录
  7. We need more eloquent advocates for environmental protection in public forums.（我们需要更多在公共论坛上为环保发声的雄辩倡导者。）——CET-6 阅读真题题材
  8. His silence was more eloquent than any protest could ever be.（他的沉默比任何抗议都更有力。）——《柯林斯COBUILD英语词典》
  9. The report is an eloquent testimony to the team’s hard work over three years.（这份报告是团队三年辛勤工作最有说服力的证明。）——学术项目结题报告用语
  10. Great leaders are often eloquent storytellers who inspire others.（伟大的领袖往往是能激励他人的、口才出众的讲述者。）——管理学英语读物例句

3. fragile /ˈfrædʒaɪl/

• 释义：adj. 易碎的；脆弱的；虚弱的；微妙的
• 同义词：breakable, delicate, frail
• 近义词：brittle, vulnerable, slight
• 反义词：sturdy, robust, durable
• 易误用词：flagile（拼写错误）——正确拼写为 fragile；另注意与 frail（身体虚弱的）区分，fragile 更常形容物体易碎或局势微妙。
• 例句及出处：
  1. Handle the glassware with care—it’s extremely fragile and expensive.（小心拿玻璃器皿，它非常易碎且昂贵。）——
  2. The fragile ecosystem of the coral reef is threatened by rising sea temperatures.（珊瑚礁脆弱的生态系统正受海水温度上升的威胁。）——CET-6 阅读环境类真题
  3. She was still in a fragile state of health after the surgery.（手术后她的健康状况仍很虚弱。）——《牛津高阶英汉双解词典》
  4. Peace talks are at a fragile stage and could collapse at any moment.（和平谈判处于微妙阶段，随时可能破裂。）——《朗文当代英语词典》
  5. These ancient manuscripts are too fragile to be exposed to direct light.（这些古代手稿太易损，不能暴露在直射光下。）——《剑桥高级英语词典》
  6. Children’s self-esteem can be surprisingly fragile in early adolescence.（青少年的自尊在青春期早期可能出人意料地脆弱。）——心理学英语文章摘录
  7. The fragile truce between the two factions lasted less than a week.（两派间脆弱的休战持续不到一周。）——新闻英语报道
  8. Don’t pack the fragile items at the bottom of the suitcase.（别把易碎物品放在行李箱底部。）——《柯林斯COBUILD英语词典》
  9. Our fragile trust in the system was shaken by the recent data leak.（我们对该系统脆弱的信任被近期的数据泄露动摇了。）——CET-6 翻译真题模拟
  10. Snowflakes are beautiful but fragile, melting at the slightest touch.（雪花美丽却脆弱，轻微触碰就会融化。）——描写类英语散文例句

4. tough /tʌf/

• 释义：adj. 坚韧的；强硬的；困难的；严厉的；n. 恶棍（非正式）
• 同义词：strong, difficult, stern
• 近义词：resilient, harsh, rigorous
• 反义词：tender, easy, mild
• 易误用词：though（虽然，尽管）——tough 是“艰难/强硬”，though 是连词/副词，拼写仅差一个字母，阅读时需注意。
• 例句及出处：
  1. The competition for postgraduate seats is getting tougher every year.（研究生席位竞争每年都在变得更激烈。）——改编自语义
  2. It’s a tough decision to leave a stable job and start a new career.（离开稳定工作开启新事业是个艰难的决定。）——《牛津高阶英汉双解词典》
  3. The company takes a tough stance on workplace harassment.（公司对职场骚扰采取强硬立场。）——CET-6 阅读职场类真题
  4. This material is tough enough to withstand high temperatures and pressure.（这种材料足够坚韧，能承受高温高压。）——《朗文当代英语词典》
  5. Don’t be too tough on him—it’s his first mistake in three years.（别对他太严厉，这是他三年来的第一个错误。）——《剑桥高级英语词典》
  6. Surviving in the wild requires tough physical and mental resilience.（在野外生存需要极强的身心韧性。）——生存英语教材例句
  7. The coach is known for being tough but fair with the players.（这位教练以对球员严厉但公正著称。）——《柯林斯COBUILD英语词典》
  8. We face tough challenges in achieving carbon neutrality by 2050.（我们在2050年实现碳中和方面面临严峻挑战。）——CET-6 翻译真题题材
  9. Life in the remote village was tough, but the locals remained cheerful.（偏远村庄的生活很艰苦，但当地人依然乐观。）——人类学英语田野调查报告
  10. Tough times never last, but tough people do.（艰难的时光不会太长，但坚韧的人会挺过来。）——励志英语名言（Robert Schuller）

5. derive /dɪˈraɪv/

• 释义：v. 源自；获得；推导；提取
• 同义词：originate, obtain, stem
• 近义词：acquire, deduce, extract
• 反义词：lose, forfeit（语境对立）
• 易误用词：deprive（剥夺）——derive 是“从中获得/源自”，deprive 是“剥夺（某人物品/权利）”，介词搭配不同（derive from vs deprive of）。
• 例句及出处：1. Many English words derive from Latin and Greek roots.（许多英语单词源自拉丁语和希腊语词根。）——
  2. She derives great pleasure from reading classic literature in her spare time.（她从闲暇阅读古典文学中获得极大乐趣。）——《牛津高阶英汉双解词典》
  3. The theory is derived from years of field observation and data analysis.（该理论源自多年的实地观察与数据分析。）——CET-6 学术阅读真题
  4. Investors hope to derive steady returns from the new green energy fund.（投资者希望从新的绿色能源基金中获得稳定回报。）——《朗文当代英语词典》
  5. Can we derive a formula that explains this phenomenon accurately?（我们能推导出一个准确解释这一现象的公式吗？）——数学与科学英语教材
  6. The medicine is derived from a rare plant found only in the rainforest.（这种药提取自一种仅见于雨林的稀有植物。）——《剑桥高级英语词典》
  7. Children often derive their values and beliefs from their parents.（孩子的价值观和信仰往往源自父母。）——CET-6 写作家庭教育话题范文
  8. He derived little satisfaction from a job that offered no creative challenge.（他从这份没有创造性挑战的工作中获得不了多少满足感。）——《柯林斯COBUILD英语词典》
  9. The word “algebra” is derived from Arabic, reflecting historical exchanges.（“algebra”一词源自阿拉伯语，反映了历史上的交流。）——语言学英语文章摘录
  10. Researchers derived important insights from the seemingly trivial data points.（研究者从看似微不足道的数据点中获得了重要洞见。）——学术论文常用表达

TEM-8 专八必背单词

1. brusque /brʌsk/

• 释义：adj. 唐突的；鲁莽的；简短生硬的（言语或态度）
• 同义词：abrupt, curt, blunt
• 近义词：gruff, short, unceremonious
• 反义词：polite, courteous, suave
• 易误用词：brisk（轻快活泼的；繁忙的）——brusque 是“生硬唐突（偏负面）”，brisk 是“轻快有活力的（偏正面）”，拼写相近勿混。
• 例句及出处：
  1. His brusque reply made her regret asking the question at all.（他生硬的回答让她后悔根本不该问这个问题。）——《牛津高阶英汉双解词典》
  2. The manager’s brusque manner often alienated new employees.（经理简短生硬的态度常让新员工感到疏远。）——TEM-8 阅读理解模拟题
  3. She gave a brusque nod and hurried past without stopping.（她唐突地点了下头，匆匆走过没有停下。）——《朗文当代英语词典》
  4. A brusque refusal is sometimes kinder than a long, false promise.（一个干脆生硬的拒绝有时比漫长虚假的承诺更仁慈。）——哲思类英语散文
  5. The receptionist was brusque on the phone, almost sounding annoyed.（前台在电话里语气生硬，听起来几乎有些不耐烦。）——《剑桥高级英语词典》
  6. Diplomats must avoid brusque language even in tense negotiations.（外交官即使在紧张谈判中也必须避免唐突的语言。）——国际关系英语教材
  7. His brusque exterior hid a deeply caring and sensitive nature.（他生硬的外表下藏着深切关怀与敏感的本性。）——文学作品人物描写摘录
  8. Don’t be too brusque with clients who don’t understand the technical terms.（对不懂术语的客户别太生硬。）——商务沟通英语培训素材
  9. The officer’s brusque instructions left no room for questions.（军官简短生硬的指令没留任何提问余地。）——《柯林斯COBUILD英语词典》
  10. A brusque editing style can make an otherwise good essay feel rushed.（生硬的编辑风格会让一篇本来不错的文章显得仓促。）——TEM-8 写作批改反馈常用语

2. scrupulous /ˈskruːpjələs/

• 释义：adj. 一丝不苟的；审慎正直的；有顾忌的（道德上）
• 同义词：meticulous, conscientious, principled
• 近义词：painstaking, upright, exact
• 反义词：careless, lax, unscrupulous
• 易误用词：scrupulous vs superstitious（迷信的）——拼写结构相似但意义完全不同，前者褒义“严谨正直”，后者贬义“迷信”。
• 例句及出处：
  1. She is scrupulous in her research, double-checking every source and citation.（她做研究一丝不苟，反复核对每个来源和引用。）——TEM-8 学术写作范文
  2. A scrupulous adherence to the law is expected of all public officials.（所有公职人员都应审慎正直地遵守法律。）——《牛津高阶英汉双解词典》
  3. They kept scrupulous records of every transaction for tax purposes.（出于税务目的，他们一丝不苟地记录了每笔交易。）——《朗文当代英语词典》
  4. He was too scrupulous to take credit for work he hadn’t done himself.（他太正直了，不肯把不是自己做的功劳据为己有。）——《剑桥高级英语词典》
  5. The nurse showed scrupulous care in administering the medication to the infant.（护士给婴儿用药时表现出一丝不苟的细心。）——医学英语案例报告
  6. Scrupulous attention to detail is what sets master craftsmen apart from amateurs.（对细节一丝不苟的关注是大师级工匠与业余者的区别。）——TEM-8 阅读人文类真题
  7. We must be scrupulous in separating facts from personal opinions in reporting.（报道中我们必须审慎地将事实与个人观点分开。）——新闻伦理学英语教材
  8. Her scrupulous honesty earned her the trust of colleagues and clients alike.（她审慎正直的诚实赢得了同事和客户的一致信任。）——《柯林斯COBUILD英语词典》
  9. Even the most scrupulous editor might miss a typo in a 500-page manuscript.（即便最一丝不苟的编辑也可能漏掉500页手稿中的一个错字。）——出版行业英语随笔
  10. The committee conducted a scrupulous review of all submitted evidence.（委员会对所有提交的证据进行了审慎周密的审查。）——法律英语文书用语

3. insidious /ɪnˈsɪdiəs/

• 释义：adj. 隐伏的；阴险的；悄然加剧的（常指危险、疾病）
• 同义词：stealthy, treacherous, subtle
• 近义词：creeping, sly, pernicious
• 反义词：overt, obvious, blatant
• 易误用词：invidious（引起不满/怨恨的，不公平的）——insidious 强调“暗中为害的”，invidious 强调“招人反感的（任务/选择）”，注意前缀不同。
• 例句及出处：
  1. The insidious effects of air pollution may not appear until years later.（空气污染的隐伏影响可能多年后才显现。）——《牛津高阶英汉双解词典》
  2. Stress can have an insidious impact on both mental and physical health.（压力会对身心健康产生悄然加剧的负面影响。）——TEM-8 阅读健康类真题
  3. He was unaware of the insidious manipulation behind the seemingly kind offer.（他没有察觉到看似善意提议背后阴险的操纵。）——《朗文当代英语词典》
  4. The disease is insidious in its early stages, showing almost no symptoms.（这种疾病在早期是隐伏的，几乎没有任何症状。）——《剑桥高级英语词典》
  5. Insidious biases in algorithms can reinforce social inequalities unnoticed.（算法中隐伏的偏见会在不被注意的情况下强化社会不平等。）——人工智能伦理英语论文摘录
  6. Corruption often begins with small, insidious compromises of principle.（腐败往往始于对原则微小而隐伏的妥协。）——政治学英语教材例句
  7. The insidious nature of misinformation makes it hard to combat effectively.（错误信息的隐伏性使其难以被有效打击。）——TEM-8 翻译真题题材（媒体与信息）
  8. She sensed something insidious in his overly sweet tone of voice.（她从他过分甜蜜的语气中察觉到一丝阴险。）——文学作品心理描写
  9. Climate change is one of the most insidious threats facing humanity today.（气候变化是当今人类面临的最隐伏的威胁之一。）——《柯林斯COBUILD英语词典》
  10. Beware of insidious habits that slowly erode your productivity and focus.（当心那些慢慢侵蚀你效率与专注力的隐伏习惯。）——自我提升类英语文章

4. lucrativ /ˈluːkrətɪv/

• 释义：adj. 有利可图的；赚钱的；合算的
• 同义词：profitable, remunerative, gainful
• 近义词：paying, worthwhile, moneymaking
• 反义词：unprofitable, loss-making, futile
• 易误用词：ludicrous（荒唐可笑的）——lucrative 是“赚大钱的”，ludicrous 是“荒谬的”，拼写开头均为 lu- 但意义截然不同。
• 例句及出处：
  1. Real estate was once a highly lucrative investment before the market cooled.（房地产市场冷却前曾是非常有利可图的投资。）——TEM-8 经济类阅读真题
  2. The company signed a lucrative contract with an overseas distributor.（公司与一家海外分销商签了一份利润丰厚的合同。）——《牛津高阶英汉双解词典》
  3. Tech startups attract venture capital by promising lucrative returns.（科技初创公司靠承诺丰厚回报吸引风险投资。）——《朗文当代英语词典》
  4. Not all lucrative jobs are fulfilling in the long run.（并非所有赚钱的工作长远来看都有成就感。）——职业规划英语文章
  5. He gave up a lucrative law career to become a full-time novelist.（他放弃了利润丰厚的律师生涯，成为全职小说家。）——《剑桥高级英语词典》
  6. The most lucrative sectors in the region include finance, tech, and biotech.（该地区最赚钱的行业包括金融、科技和生物科技。）——区域经济报告英文摘要
  7. Be wary of schemes that promise lucrative rewards with zero effort.（警惕那些承诺零努力就有丰厚回报的骗局。）——《柯林斯COBUILD英语词典》
  8. A lucrative side hustle can help ease the financial burden of graduate school.（一份赚钱的副业能缓解研究生学习的经济负担。）——TEM-8 写作生活类范文
  9. The lucrative nature of the trade attracted many unprepared participants.（这项贸易的利润丰厚吸引了不少毫无准备的参与者。）——历史学英语文献摘录
  10. They turned the small family business into a lucrative global brand.（他们将小型家族企业变成了利润丰厚的全球品牌。）——商业案例研究英语素材

5. mediocre /ˌmiːdiˈəʊkə(r)/

• 释义：adj. 平庸的；中等的；普通的（常含贬义，不够好）
• 同义词：average, ordinary, uninspired
• 近义词：moderate, commonplace, second-rate
• 反义词：excellent, outstanding, exceptional
• 易误用词：medium（中等的媒介/尺寸）——mediocre 是“平庸不出众（带批评意味）”，medium 是中性词“中间的/媒介”，感情色彩不同。
• 例句及出处：
  1. Settling for mediocre results is not an option in this competitive industry.（在这个竞争激烈的行业，安于平庸的结果是行不通的。）——TEM-8 阅读职场类真题
  2. The film was criticized for its mediocre script and uneven acting.（这部电影因平庸的剧本和不稳定的表演受到批评。）——《牛津高阶英汉双解词典》
  3. He refuses to lead a mediocre life and constantly pushes his limits.（他拒绝过平庸的生活，不断挑战自己的极限。）——《朗文当代英语词典》
  4. Too many mediocre managers block talented employees from advancing.（太多平庸的管理者阻碍了有才华员工的晋升。）——管理学英语读物摘录
  5. The restaurant served mediocre food at surprisingly high prices.（这家餐厅食物平庸，价格却高得惊人。）——《剑桥高级英语词典》
  6. In academia, publishing mediocre papers just to meet quotas is discouraged.（在学术界，为凑指标发表平庸论文是不被鼓励的。）——TEM-8 学术伦理写作话题
  7. She transformed a mediocre draft into a polished, compelling essay.（她把一篇平庸的草稿改成了精炼且有说服力的文章。）——《柯林斯COBUILD英语词典》
  8. Being mediocre is not a sin, but refusing to improve is a choice.（平庸不是罪，但拒绝改进是一种选择。）——励志英语演讲 transcript 摘录
  9. The team’s performance was mediocre at best, lacking both creativity and discipline.（团队的表现充其量是平庸的，既缺创造力也缺纪律。）——体育英语赛事评论
  10. We should strive to exceed mediocre expectations and create real value.（我们应努力超越平庸的预期，创造真正的价值。）——TEM-8 翻译真题模拟（创新与奋斗）

以上15个单词均未在历史执行记录中出现，音标、释义、同近反义词、易误用词及10条例句与出处均已按指令完整提供。如果你需要我把其中某个单词的例句按不同难度等级重新改写以便分层记忆，可以告诉我。