quarantine
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B2 noun/verb /ˈkwɒr.ən.tiːn/

quarantine

隔离
Meaning
A period of isolation to prevent the spread of disease.
Example
The travelers were placed in quarantine for two weeks.
旅行者被隔离了两周。
C2 adjective /kwɪkˈsɑː.t̬ɪk/

quixotic

极端理想主义的、不切实际的和不实际的
Meaning
Extremely idealistic, unrealistic, and impractical.
Example
His quixotic dreams often led to disappointment.
他那些不切实际的梦想常常导致失望。
B2 adjective /ˈkwɔːrtərli/

Quarterly

季度的
Meaning
occurring every three months; relating to a quarter of a year
Example
The company publishes quarterly reports to shareholders.
公司发布每季度报告给股东。
B2 noun ˈkwəʊ.tə

quota

配额
Meaning
A limited or fixed number or amount of people or things, in particular.
Example
The quota reform was a key demand.
配额改革是一个关键要求。
A2 verb /kwɪt/

quit

辞职
Meaning
to stop doing something; to leave a job or position
Example
She decided to quit her job and start her own business.
她决定辞职并开始自己的生意。
C1 noun /kwɪnˈtɛt/

quintet

五重奏
Meaning
A group of five people or things, especially musicians.
Example
The jazz quintet performed beautifully.
爵士五重奏演奏得非常美妙。
C1 verb /kwɛl/

quell

镇压
Meaning
To suppress or put an end to something, usually by force.
Example
The police were called to quell the violent protest.
警方被召唤以平息暴力抗议。
C2 verb /kwɒf/

quaff

一口喝下
Meaning
to drink something heartily or in large gulps, especially an alcoholic drink
Example
He quaffed a mug of ale after the long day.
他在长时间工作后，一口气喝完了一杯啤酒。
C1 noun /kwɑːm/

qualm

怀疑
Meaning
a feeling of doubt, worry, or fear about something
Example
She had no qualm about speaking her mind.
她在表达自己想法时没有任何怀疑。
C1 adjective /ˈkwɪzɪkəl/

quizzical

困惑的, 疑问的
Meaning
Expressing mild or amused puzzlement.
Example
She gave him a quizzical look when he made the strange comment.
当他说出奇怪的评论时，她投给了他一个困惑的眼神。
C1 noun /kiː/

quay

码头
Meaning
A platform lying alongside or projecting into water for loading and unloading ships.
Example
The cargo was unloaded at the quay.
货物在码头被卸下。
B2 noun /ˌkwes.tʃəˈneər/

questionnaire

问卷
Meaning
a set of written questions used to collect information or opinions
Example
Participants filled out a detailed questionnaire about their habits.
参与者填写了关于他们习惯的详细问卷。
B2 noun ˈkwɒlɪti sliːp

quality sleep

优质睡眠
Meaning
Deep and healthy sleep that is adequate and restorative, ensuring physical and mental well-being
Example
Quality sleep improves cognitive function and overall health.
优质的睡眠改善认知功能和整体健康。
A2 adjective /ˈkwaɪ.ɪt/

Quiet

安静的; 平静的; 没有声音的; 发出很少或没有噪音
Meaning
silent; peaceful; calm; making little or no noise
Example
Please keep quiet during the movie.
请在电影期间保持安静。
B1 adjective /ˈkwɑː.lɪ.faɪd/

Qualified

合格的; 认证的
Meaning
having the necessary skills, knowledge, or experience for a particular job or activity; certified
Example
She is a qualified doctor with years of experience.
她是一位具有多年经验的合格医生。
C2 adjective /ˈkwɛrʊləs/

querulous

抱怨的
Meaning
Complaining in a whining or irritable manner.
Example
The querulous customer kept finding fault with every detail.
那个抱怨的顾客一直在找每个细节的错误。
B2 adjective /ˈkwestʃənəbl/

Questionable

可疑的
Meaning
doubtful; dubious; suspicious; open to doubt or suspicion
Example
His questionable business practices led to an investigation.
他的可疑商业行为导致了一项调查。
C2 noun /ˈkwɒdrʊpɛd/

quadruped

Meaning
an animal that walks on four feet
Example
Most mammals are quadruped creatures adapted for running and stability.
C1 verb /kwentʃ/

quench

解渴
Meaning
to satisfy thirst by drinking; to extinguish fire
Example
He drank water to quench his thirst after the long run.
他跑完步后喝水解渴。
C1 adjective /ˈkwiːzi/

queasy

恶心
Meaning
Feeling sick to one's stomach; nauseated.
Example
She felt queasy after the long boat ride.
她在长时间的船上旅行后感到恶心。
C2 noun /kwɪˈɛsəns/

quiescence

静止
Meaning
A state of quietness, inactivity, or dormancy.
Example
The volcano has been in a state of quiescence for decades.
火山已经处于静止状态几十年了。
B1 noun /kjuː/

Queue

队列
Meaning
a line of people or things waiting for something; a sequence
Example
We had to wait in a long queue to buy tickets for the movie.
我们必须在一条长队列中等待购买电影票。
A1 adjective /kwɪk/

Quick

快速
Meaning
fast; rapid; swift; happening in a short time
Example
She gave a quick answer to the teacher's question.
她对老师的问题给出了快速的回答。
C1 adjective /ˈkwɑː.rəl.səm/

Quarrelsome

好争斗的；好争论的；爱吵架的
Meaning
given to arguing and fighting; argumentative and confrontational
Example
His quarrelsome nature makes it difficult to work with him.
他好争斗的性格使得与他共事变得困难。
C1 adjective ˈkwɒn.tɪ.faɪ.ə.bəl

quantifiable

可量化的
Meaning
Able to be expressed or measured as a quantity; capable of being counted or calculated.
Example
The impact of the project is quantifiable.
项目的影响是可量化的。
B1 noun /ˈkwɒl.ɪ.ti taɪm/

quality time

优质时间
Meaning
Time spent giving someone your full attention in order to strengthen your relationship with them.
Example
Spending quality time with family enhances relationships.
与家人共度优质时间可以增强关系。
B2 noun /ˈkwɔː.tərz/

Quarters

宿舍; 兵营; 军事住房
Meaning
living accommodation; lodgings; military housing
Example
The soldiers returned to their quarters after the training exercise.
士兵们在训练后返回了他们的宿舍。
B1 verb /kwoʊt/

quote

引用
Meaning
to repeat someone else's words; to give a price or estimate
Example
The teacher asked students to quote the famous author in their essays.
老师要求学生在他们的论文中引用著名作者。
C2 noun /kwaɪˈiːtəs/

Quietus

死亡或导致死亡的事物；最终解决
Meaning
death or something that causes death; a final settlement
Example
The hero received his quietus from the villain's sword.
英雄从反派的剑下获得了他的安息。
B2 verb /kweɪk/

quake

颤抖
Meaning
to shake or tremble, often due to fear or a natural event like an earthquake
Example
The ground began to quake during the earthquake.
地面在地震中开始颤抖。
C2 noun /ˈkwɪkˌsɪlvər/

quicksilver

水银
Meaning
Mercury; a liquid metal, or something that is quick and unpredictable.
Example
His mood was as changeable as quicksilver.
他的情绪像水银一样变化无常。
B1 noun /ˌkwɒl.ɪ.fɪˈkeɪ.ʃən/

Qualification

资格; 能力
Meaning
official record showing that someone has finished a training course or has necessary skills; condition or requirement
Example
She has the right qualifications for this engineering job.
她拥有这个工程工作的必要资格。
C1 verb /kwɑːʃ/

quash

撤销
Meaning
To reject or void something legally or to put an end to something forcefully.
Example
The court quashed the decision due to lack of evidence.
法院因缺乏证据而撤销了决定。
B2 adjective /ˈkwɑː.lɪ.teɪ.tɪv/

Qualitative

定性
Meaning
relating to quality or character rather than quantity; descriptive rather than numerical
Example
The research focuses on qualitative analysis rather than numbers.
研究侧重于定性分析，而非数字。
C2 adjective /ˈkwɒdreɪt/

quadrate

方形
Meaning
square or nearly square; having four sides or being suited or corresponding to something
Example
The tiles had a neat quadrate shape that made the floor look orderly.
瓷砖呈现出整齐的方形形状，使地板看起来整洁。
C2 verb, noun /ˈkweɪvər/

quaver

颤抖
Meaning
To shake or tremble in speaking, typically through nervousness or emotion.
Example
Her voice quavered as she spoke before the crowd.
她的声音在讲话时颤抖，尤其是在人群面前。
A2 noun ˈkwɒl.ɪ.ti

quality

质量
Meaning
The standard of something as measured against other things of a similar kind; the degree of excellence of something.
Example
Quality assurance is vital in medical education.
质量保证在医学教育中至关重要。
C1 noun /kwɔːrˈtɛt/

quartet

四重奏
Meaning
A group of four people playing music or singing together.
Example
The string quartet performed beautifully at the concert.
弦乐四重奏在音乐会上表现得非常出色。
C2 noun /kwiːn kreɪp ˈmɜːrtəl/

Queen crape myrtle

皇后夹竹桃
Meaning
A flowering tree with colorful, crepe-like flowers, scientifically known as Lagerstroemia
Example
The Queen crape myrtle bloomed beautifully in the garden with its purple flowers.
皇后夹竹桃在花园里盛开，紫色的花朵美丽地绽放。
C1 adjective /ˈkwɑː.drʊ.pəl/

Quadruple

四倍的
Meaning
four times as much or as many; consisting of four parts
Example
The company's profits have shown quadruple growth this year.
公司的利润今年增长了四倍。
B2 noun /ˈkwɒr.əl/

Quarrel

争吵; 争论
Meaning
an angry argument or disagreement between people
Example
They had a quarrel about money and stopped talking to each other.
他们因为钱发生了争吵，停止了相互交谈。
C1 noun/verb /kwɪp/

quip

机智的评论
Meaning
A witty remark; to make a witty or clever comment.
Example
She quipped about the weather during the meeting.
她在会议中调侃天气。
C1 noun (plural) /kwɑːmz/

qualms

疑虑
Meaning
feelings of doubt, worry, or uneasiness
Example
He had serious qualms about accepting the offer.
他对接受这个提议感到严重的怀疑。
B1 noun /ˈkwɒn.tə.ti/

Quantity

数量; 数字; 体积
Meaning
an amount or number of something; the measurable property of something
Example
The quantity of water in the bottle is sufficient for the trip.
瓶子里的水量足够旅行使用。
A1 noun /ˈkwes.tʃən/

Question

问题; 疑问句;
Meaning
a sentence asking for information or a response; an interrogative expression
Example
The teacher asked a difficult question during the exam.
老师在考试中提出了一个难题。
C2 noun /ˈkwɔːrtoʊ/

quarto

四折书
Meaning
A book size resulting from folding each printed sheet into four leaves (eight pages).
Example
The library has rare Shakespeare quartos.
图书馆里有稀有的莎士比亚四折书。
B1 verb /ˈkwɒlɪfaɪ/

qualify

取得资格
Meaning
to successfully complete a course or pass an exam; to become eligible
Example
She worked hard to qualify for the competition.
她努力工作以取得比赛的资格。
B1 noun /ˈkwɔː.tər/

Quarter

季度
Meaning
one of four equal parts of something; a period of three months
Example
The company reported strong profits in the first quarter of the year.
公司报告了第一季度的强劲利润。
C1 noun /ˈkwɒn.dər.i/

Quandary

困境; 为难
Meaning
a difficult situation where you cannot decide what to do; dilemma
Example
She was in a quandary about which job offer to accept.
她在选择接受哪个工作机会时陷入了困境。
A2 noun /kwiːn/

queen

女王
Meaning
a female ruler of a country or the wife of a king
Example
The queen addressed her people with grace.
女王以优雅的姿态向她的人民致辞。
A2 adverb /kwaɪt/

Quite

相当; 相对; 完全
Meaning
to a considerable extent; fairly; rather; completely
Example
The movie was quite interesting.
这部电影相当有趣。
C1 noun /kwoʊ/

quo

现状
Meaning
The existing state of affairs or situation, often used in the phrase 'status quo'.
Example
He wanted to maintain the status quo at work.
他想保持工作中的现状。
A2 adverb /ˈkwaɪ.ət.li/

Quietly

安静地; 平静地
Meaning
without making much noise; silently; in a calm manner
Example
She spoke quietly so she wouldn't wake the baby.
她小声说话，生怕吵醒婴儿。
C2 noun /ˈkwaɪəˌtuːd/

quietude

宁静
Meaning
A state of stillness and tranquility.
Example
She enjoys the quietude of the countryside.
她享受乡村的宁静。
C1 noun/verb /ˈkwɒr.i/

quarry

采石场 / 猎物
Meaning
A place where stone or minerals are extracted; also means prey when hunted.
Example
The workers quarried limestone from the hill.
工人们从山上开采石灰岩。
B2 noun /ˈkwɪə.ri/

Query

查询; 问题;
Meaning
a question or inquiry; a request for information
Example
I have a query about the new policy changes in the company.
我有一个关于公司新政策变化的查询。
B2 adjective /ˈkwɑːn.tɪ.teɪ.tɪv/

Quantitative

定量的
Meaning
relating to quantity or amount; expressed in terms of numbers or measurements
Example
The study provides quantitative evidence of climate change effects.
该研究提供了气候变化影响的定量证据。
C1 noun /kwɜːrk/

Quirk

怪癖; 习惯
Meaning
a peculiar behavioral habit; an unexpected turn or twist
Example
Her quirk of always wearing mismatched socks made her unique.
她总是穿着不配的袜子，这个怪癖使她与众不同。
C2 noun /ˌkiː ˈviːv/

qui vive

警觉
Meaning
A state of alertness or vigilance.
Example
The guards were on the qui vive during the night.
警卫们在夜间保持警觉。
C1 adjective /kwɪər/

Queer

奇怪的; 不寻常的; 特殊的
Meaning
strange; unusual; peculiar; odd
Example
The old house had a queer atmosphere that made visitors uncomfortable.
这座老房子有一种奇怪的气氛，让访客感到不舒服。
C1 noun /ˈkwɪk.sænd/

Quick-sand

流沙
Meaning
loose wet sand that yields easily to pressure and sucks in anything on its surface
Example
The explorer got trapped in quicksand while crossing the desert.
探险家在穿越沙漠时被流沙困住。
C1 noun /kwæk/

Quack

江湖医生
Meaning
a person who pretends to be a doctor but has no medical training; the sound a duck makes
Example
People should be careful not to trust medical advice from a quack.
人们应该小心不要相信一个江湖医生的医疗建议。
C1 verb /ˈkwentʃɪŋ/

quenching

解渴 / 熄灭
Meaning
The act of satisfying thirst or extinguishing something like fire.
Example
Drinking cold water was quenching her thirst.
喝冷水解渴。
C2 adjective /kwaɪˈesnt/

Quiescent

静止的; 安静的; 不活跃的;
Meaning
quiet; peaceful; inactive; dormant; at rest
Example
The volcano has been quiescent for over a century.
火山已经沉寂了一个多世纪。
B2 noun /kwɪlt/

Quilt

被子
Meaning
a warm bed covering made of padding enclosed between layers of fabric
Example
Grandmother made a beautiful quilt with colorful patches for my bed.
祖母为我的床做了一个美丽的被子，上面有五彩斑斓的补丁。
C1 adjective /kweɪnt/

quaint

古雅的
Meaning
attractively unusual or old-fashioned
Example
They stayed in a quaint little cottage by the sea.
他们住在海边的一座古雅的小屋里。
C1 noun /ˈkwɔːrəm/

quorum

法定人数
Meaning
The minimum number of members needed to conduct official business in a meeting.
Example
The board meeting was postponed because there was no quorum.
由于没有法定人数，董事会会议被推迟了。
B2 adjective /ˈkwɜːrki/

quirky

奇特的
Meaning
Unusual in an interesting, charming, or odd way.
Example
She has a quirky sense of fashion that makes her stand out.
她有一种奇特的时尚感，使她与众不同。
C1 noun /ˈkwæɡˌmaɪər/

quagmire

泥潭，困境
Meaning
a soft, wet area of land that gives way underfoot; a complex or dangerous situation
Example
The hikers were trapped in a political quagmire.
徒步旅行者被困在一个政治泥潭中。
C1 verb /ˈkwɪkən/

quicken

加快
Meaning
to make or become faster; to accelerate
Example
His pulse began to quicken as he approached the finish line.
他的脉搏在接近终点线时开始加速。
C1 verb, noun /kweɪl/

quail

感到恐惧; 一种小的短尾鸟
Meaning
verb: to feel or show fear; noun: a small, short-tailed bird
Example
She quailed at the sight of the approaching storm.
她在看到即将来临的风暴时感到害怕。
C1 noun /kwɪnˈtɛsəns/

quintessence

精髓
Meaning
The purest or most perfect example of something.
Example
She is the quintessence of elegance.
她是优雅的精髓。
C2 noun kwɔːrk

quark

夸克
Meaning
A fundamental subatomic particle that combines to form protons and neutrons.
Example
Quarks form protons and neutrons.
夸克形成质子和中子。
C1 verb/noun /ˈkwɪbəl/

quibble

Meaning
To argue or raise objections about a trivial matter; a petty objection.
Example
They quibbled over who should pay the bill.
C2 noun /ˈkwɪzlɪŋ/

quisling

叛徒
Meaning
A traitor who collaborates with an enemy force occupying their country.
Example
During the war, he was branded a quisling for aiding the invaders.
在战争期间，他因帮助入侵者而被贴上了“奎斯林”标签。
B2 noun /kwəʊˈteɪʃən/

quotation

引语; 报价
Meaning
a group of words taken from a text or speech and repeated exactly; an estimated price given for goods or services
Example
The article opened with a famous quotation from Shakespeare.
这篇文章以莎士比亚的一句名言开头。
C1 adjective ˌkwɪn.tɪˈsen.ʃəl

quintessential

典型的完美或典型的例子
Meaning
representing the most perfect or typical example of a quality or class.
Example
The artist's work is the quintessential example of modernism.
艺术家的作品是现代主义的典型示例。
B2 noun /kwest/

Quest

寻找; 探索
Meaning
a journey or search for something; an adventure to achieve a goal
Example
The knight embarked on a quest to find the legendary treasure.
骑士开始了一次寻找，以找到传说中的宝藏。
B2 noun /ˈkwɔːtərˌbæk/

quarterback

四分卫
Meaning
the player who directs a team’s offense in American football
Example
The quarterback threw a perfect pass.
四分卫传了一个完美的传球。
C1 verb /ˈkwɪvər/

quiver

颤抖
Meaning
To tremble or shake with slight but rapid motion.
Example
Her lips began to quiver as she tried not to cry.
她的嘴唇开始颤抖，因为她试图不哭。
A1 adverb /ˈkwɪk.li/

Quickly

迅速; 快速
Meaning
at a fast speed; with little delay; rapidly
Example
He quickly finished his homework.
他迅速完成了他的作业。
C2 adjective /kwəʊˈtɪdiən/

quotidian

日常的，普通的
Meaning
Ordinary or everyday, especially when mundane.
Example
He focused on the quotidian details of family life.
他专注于家庭生活中的日常细节。