C2 adjective /ˌʌltrəˈmʌndeɪn/

ultramundane

超凡

Meaning

Relating to things beyond the physical world; supernatural or transcendental.

Example

Philosophers often discuss ultramundane realities beyond human perception.

哲学家们常常讨论超越人类感知的超凡现实。

C2 noun /ˈjuːʒəri/

usury

高利贷

Meaning

The practice of lending money at unreasonably high interest rates.

Example

The law strictly prohibits usury.

法律严格禁止高利贷。

C1 adjective /ʌnˈʃeɪkən/

Unshaken

坚定不移; 坚固

Meaning

not disturbed or affected; firm and steady; unwavering

Example

Her faith remained unshaken despite all the challenges.

尽管面临所有挑战，她的信念依然坚定不移。

C1 adjective /ʌnˈɜːrθli/

unearthly

超自然的

Meaning

Strange or unnatural in a way that seems not of this world

Example

The forest was filled with an unearthly glow.

森林中充满了超自然的光辉。

C2 adjective /ʌpˈrɔːr.i.əs/

uproarious

极其滑稽

Meaning

Extremely funny or noisy; causing loud laughter or commotion.

Example

The comedian's jokes were absolutely uproarious.

喜剧演员的笑话绝对是极其滑稽的。

B1 adjective ʌnˈplænd

unplanned

未计划的

Meaning

Not planned or arranged in advance; happening spontaneously without preparation.

Example

Unplanned urbanization contributes to environmental issues.

无计划的城市化会加剧环境问题。

C1 adverb /ˌʌnkənˈvɛnʃənəli/

unconventionally

非传统地

Meaning

in a way that is not based on or conforming to accepted standards or norms

Example

She dresses unconventionally, mixing bold colors and patterns that surprise everyone.

她穿着非传统地，混搭大胆的颜色和图案，让每个人都感到惊讶。

C1 adjective /ˌʌnbɪˈliːvɪŋ/

unbelieving

不相信的

Meaning

Not willing or able to believe; skeptical or doubtful

Example

She gave him an unbelieving look when he claimed to have met a celebrity.

当他声称见过一位名人时，她给了他一个不相信的眼神。

B1 adjective /ˌʌnɪkˈspektɪd/

Unexpected

出乎意料的; 令人惊讶的

Meaning

not expected or anticipated; surprising

Example

The unexpected news left everyone speechless.

出乎意料的消息让所有人都哑口无言。

C1 adjective /ʌnˈruːli/

Unruly

不守规矩的; 乱七八糟的;

Meaning

difficult to control or manage; disorderly and disruptive

Example

The unruly crowd refused to follow the safety instructions.

那群无法控制的人群拒绝遵循安全指令。

B2 adjective /ʌnˈtʃeɪndʒɪŋ/

unchanging

不变的

Meaning

remaining the same over time; not changing

Example

Her love for her family was unchanging throughout the years.

她对家人的爱多年来始终不变。

C2 adjective /ˌʌnɪkˈsɛpʃənəbl/

unexceptionable

无可指摘

Meaning

Not open to objection; acceptable and unobjectionable

Example

His behavior was unexceptionable throughout the event.

他的行为在整个事件中都是无可指摘的。

B2 adjective /ʌnˈiːvən/

Uneven

不平; 粗糙

Meaning

not level or smooth; not regular or consistent

Example

The road was uneven and full of potholes.

那条路不平，充满了坑洞。

C2 adjective /ˈʌndjʊləs/

undulous

波浪形的

Meaning

Having a wavy surface or form.

Example

The artist painted the undulous sea at sunset.

艺术家在日落时画了波浪形的海洋。

C2 adjective /ˌʌnəˈsweɪdʒd/

unassuaged

未缓解

Meaning

Not made less intense or relieved; unrelieved.

Example

His grief remained unassuaged despite the passage of time.

他的痛苦尽管时间流逝依然未缓解。

B1 adjective /ʌnˈfeər/

Unfair

不公平; 不正当;

Meaning

not right or just; treating people in a way that favors some over others

Example

It's unfair to blame her for something she didn't do.

指责她做了她没有做的事是不公平的。

A2 noun /ˈʌndərweər/

underwear

内衣

Meaning

Clothing worn beneath outer clothes, typically next to the skin.

Example

He bought new underwear for the trip.

他为旅行买了新的内衣。

A1 noun /ˌjuːnɪˈvɜːrsɪti/

university

大学

Meaning

an institution of higher education and research, which grants academic degrees

Example

She is studying law at the university.

她在大学学习法律。

C2 noun /ˈɜːrtʃɪn/

urchin

街头小孩

Meaning

a mischievous or poorly dressed child, often from the streets

Example

The ragged urchins played by the riverbank.

那些穿着破烂的街头小孩在河边玩耍。

C1 verb /ˌʌndərˈsteɪt/

understate

低估

Meaning

To describe something as being less important or serious than it really is.

Example

He tends to understate his achievements.

他倾向于低估自己的成就。

B2 adverb /ˈʌt.ə.li/

Utterly

完全地; 绝对地; 完整地

Meaning

completely; absolutely; totally

Example

The movie was utterly boring and I fell asleep.

电影完全无聊，我睡着了。

B1 adjective /ˌʌnbɪˈliːvəbəl/

Unbelievable

难以置信

Meaning

impossible to believe; extremely surprising or remarkable

Example

The magician's performance was absolutely unbelievable.

魔术师的表演简直令人难以置信。

C1 adjective /ˌʌnˈpɑr.də.nə.bəl/

Unpardonable

不可宽恕的

Meaning

too bad to be forgiven; inexcusable

Example

His betrayal of trust was an unpardonable offense.

他的背叛是不可原谅的罪行。

B2 adjective /ʌnˈɡreɪt.fəl/

Ungrateful

忘恩负义

Meaning

not feeling or showing thanks for something done or given; not appreciating kindness

Example

She felt he was ungrateful for all the help she had given him.

她觉得他对她给予的所有帮助都忘恩负义。

C1 noun /ʌnkənˈsɜːrn/

Unconcern

漠不关心

Meaning

lack of worry or interest; indifference

Example

She showed complete unconcern about the criticism.

她对批评表现出了完全的漠不关心。

B2 adjective /ʌnˈbiːtən/

Unbeaten

不败的; 未被击败的

Meaning

not defeated; having never lost; undefeated

Example

The team remains unbeaten this season.

这个团队本赛季保持不败。

B2 adverb juːˈnæn.ɪ.məs.li

unanimously

一致通过

Meaning

With the agreement of all people involved; without opposition.

Example

The proposal was unanimously accepted.

提案得到了全体一致通过。

B2 adjective /ʌnˈwɜːrði/

Unworthy

不配; 没有价值

Meaning

not deserving respect or attention; lacking worth or merit

Example

He felt unworthy of such praise and recognition.

他觉得自己不配得到这样的赞扬和认可。

B1 adjective /ˈʌpˌkʌmɪŋ/

upcoming

即将到来

Meaning

about to happen or appear

Example

The upcoming event will be held next week.

即将到来的活动将在下周举行。

C2 adjective /ʌnˈtɛmpərd/

untempered

失控的

Meaning

not moderated or softened; lacking proper balance or control

Example

The untempered anger of the crowd caused chaos.

人群的失控愤怒引发了混乱。

B1 adjective /ˌʌndərˈstændəbl/

understandable

可以理解的

Meaning

Able to be understood; reasonable or justifiable.

Example

Her reaction was understandable given the situation.

考虑到情况，她的反应是可以理解的。

C1 adjective /ʌnˈvaɪəbl/

unviable

不可行的

Meaning

Not capable of working successfully; not feasible or practical.

Example

The project was deemed unviable due to high costs.

由于高昂的成本，该项目被认为不可行。

B2 adjective /ʌnˈbæləns/

Unbalanced

不平衡的; 不稳定的

Meaning

not balanced; lacking stability or equilibrium; mentally unstable

Example

The unbalanced table kept wobbling.

不平衡的桌子摇晃着。

B1 adjective /ʌnˈjuː.ʒu.əl/

Unusual

不寻常; 奇怪;

Meaning

not typical; strange; different from what is normal

Example

She wore an unusual dress to the party.

她穿了一件不寻常的衣服去参加派对。

B2 noun /ʌnˈkaɪndnəs/

unkindness

不友善

Meaning

lack of kindness; cruel or inconsiderate behavior

Example

His unkindness hurt her feelings deeply.

他的不友善深深伤害了她的感情。

C2 verb /ʌnˈɑːrm/

unarm

解除武装

Meaning

to remove weapons from someone or to deprive of means of attack or defense

Example

The soldiers were ordered to unarm the prisoners.

士兵接到命令解除囚犯的武装。

B2 noun /ˈʌpˌkiːp/

up-keep

维护

Meaning

The process or cost of maintaining something in good condition.

Example

The upkeep of the old house is very expensive.

老房子的维护非常昂贵。

C1 adjective /ʌnˈseɪvəri/

unsavory

令人不快

Meaning

Disagreeable, unpleasant, or morally offensive.

Example

The politician was linked to an unsavory scandal.

那位政治家与一宗令人不快的丑闻有关。

B2 adverb /ʌnˈfɛərli/

unfairly

不公平地

Meaning

In a manner that is not just, reasonable, or impartial

Example

He was treated unfairly by the committee.

他被委员会不公平地对待。

C1 adjective /ˌʌnɪmˈplɔɪəbəl/

unemployable

不适合就业

Meaning

Not able to be employed; lacking the skills or qualities necessary for employment

Example

Due to his criminal record, he was considered unemployable in most companies.

由于他的犯罪记录，他在大多数公司被认为是不适合就业。

B2 adjective /ʌnˈkɒmən/

uncommon

不常见

Meaning

rare, unusual, or remarkable

Example

It is uncommon to see snow in this region.

在这个地区看到雪是不常见的。

B1 adverb /ʌnˈjuːʒuəli/

unusually

异常地

Meaning

in a way that is not typical or expected; to an uncommon degree

Example

It was unusually cold for this time of year.

对一年中的这个时候来说，天气异常寒冷。

C1 noun /ˌʌnprɪˈdɪktəˌbɪləti/

unpredictability

不可预测性

Meaning

The quality of being impossible to predict or anticipate.

Example

The unpredictability of the weather made the trip uncertain.

天气的不可预测性使得旅行充满不确定性。

A1 adverb /ˈjuː.ʒu.ə.li/

Usually

通常; 一般

Meaning

in most cases; generally; as a rule

Example

I usually wake up at 7 AM every morning.

我通常每天早上7点起床。

B2 adjective /ʌnˈsteɪbəl/

Unstable

不稳定

Meaning

likely to change; not steady or secure; unsteady

Example

The unstable economy made people worried about their jobs.

不稳定的经济让人们担心他们的工作。

B2 adjective /ˈʌt.ɚ/

Utter

完全的; 绝对的; 全部的

Meaning

complete; absolute; total

Example

The movie was an utter disaster at the box office.

这部电影在票房上完全失败了。

C2 verb /ʌpˈhiːv/

upheave

抬起

Meaning

to lift or raise something forcefully; to cause to rise suddenly

Example

The workers had to upheave the heavy stone to clear the path.

工人们不得不抬起重石来清理道路。

C2 adjective /ˌʌnsɛrəˈmoʊniəs/

unceremonious

不拘礼节/粗鲁

Meaning

Done without formality or courtesy; abrupt or rude.

Example

He made an unceremonious exit from the party.

他从派对上不拘礼节地离开。

B2 adjective /ˌʌnrɪˈzɒlvd/

unresolved

未解决的

Meaning

not solved or settled; remaining undecided or unclear

Example

The dispute remains unresolved despite several meetings.

尽管开了几次会议，这个争议仍未解决。

C1 adjective /ʌnˈskeɪðd/

unscathed

毫发无损

Meaning

Without suffering any injury, damage, or harm.

Example

She escaped from the accident unscathed.

她毫发无损地逃离了事故。

A2 adjective /ʌnˈhel.θi/

Unhealthy

不健康的; 有害的

Meaning

harmful to health; not in good health; detrimental to well-being

Example

Eating too much fast food is unhealthy for your body.

吃太多快餐对你的身体不健康。

A2 conjunction /ʌnˈlɛs/

unless

除非

Meaning

except if

Example

We won't go unless it stops raining.

除非雨停了，否则我们不去。

C1 adjective /ˌʌnəˈfɛktɪd/

unaffected

不受影响的, 自然的

Meaning

Not influenced or touched by something; genuine and natural.

Example

He remained unaffected by the criticism and kept working hard.

他对批评毫不受影响，继续努力工作。

C2 noun juːˈbɪkwɪti

ubiquity

普遍性

Meaning

The fact of appearing everywhere or of being very common.

Example

The ubiquity of smartphones has transformed communication.

智能手机的普遍性改变了通信方式。

B1 adverb /ˌʌpsaɪd ˈdaʊn/

Upside-down

倒过来

Meaning

with the upper part at the bottom; in or into a reversed position

Example

The picture was hanging upside-down on the wall.

图片倒挂在墙上。

A1 noun /ˈʌŋkəl/

uncle

叔叔/舅舅

Meaning

the brother of one's father or mother

Example

My uncle is visiting us next week.

我的叔叔下周会来看我们。

C1 adjective /ʌnˈvɔɪst/

unvoiced

未表达

Meaning

not expressed in speech; in phonetics, a sound produced without vocal cord vibration

Example

The student kept her opinion unvoiced during the meeting.

学生在会议期间保持她的意见未表达。

B2 adjective /ˌʌnˈnoʊ.tɪst/

Unnoticed

未被注意到; 被忽视

Meaning

not seen or observed; ignored

Example

His hard work went unnoticed by his manager.

他的辛勤工作没有被经理注意到。

C1 noun /ˈʌp.rɔːr/

Uproar

骚动; 喧嚣; 混乱

Meaning

a loud and emotional noise or disturbance; public outcry

Example

The announcement caused an uproar among the students.

公告在学生中引起了骚动。

B2 adjective /ʌnˈkɒn.ʃəs/

Unconscious

昏迷; 无意识

Meaning

not awake and aware of one's surroundings; done or existing without one realizing

Example

The patient was unconscious for several hours after the surgery.

病人在手术后昏迷了几个小时。

C2 adjective /ˌʌnprəˈpɪʃəs/

unpropitious

不利

Meaning

Not giving or indicating a good chance of success; unfavorable.

Example

The team began their journey under unpropitious weather conditions.

团队在不利的天气条件下开始了他们的旅程。

C1 noun ˌʌndərˈprɪvəlɪdʒd ɡruːps

underprivileged groups

贫困群体

Meaning

Groups of people who lack basic necessities or advantages that are available to other members of society.

Example

Underprivileged groups benefit from social initiatives.

贫困群体从社会倡议中受益。

C1 noun /juːˈtoʊpiə/

utopia

乌托邦

Meaning

An imagined perfect society or place where everything is ideal.

Example

Many philosophers dreamed of creating a utopia for humanity.

许多哲学家梦想着为人类创造一个乌托邦。

C1 adjective /ʌnˈfɛtərd/

unfettered

不受限制的

Meaning

not restricted or confined; free

Example

The artist enjoyed unfettered freedom of expression.

艺术家享受了无限制的表达自由。

A1 adverb /ʌp/

up

向上

Meaning

towards a higher position or level

Example

He climbed up the ladder quickly.

他迅速爬上了梯子。

B1 adjective /ʌnˈkʊkt/

uncooked

生的

Meaning

Not cooked; in a raw state.

Example

Eating uncooked meat can be dangerous.

吃生肉可能是危险的。

B2 verb /ˌʌndərˈmaɪn/

undermine

削弱

Meaning

to gradually weaken or damage something or someone

Example

Constant criticism can undermine a child's confidence.

持续的批评可能会削弱孩子的自信心。

B2 noun /ˈjuː.sɪdʒ/

Usage

使用

Meaning

the action of using something; the way in which words are used in a language

Example

The dictionary explains the correct usage of difficult words.

词典解释了难词的正确用法。

B1 adjective /ʌnˈʃʊr/

unsure

不确定的

Meaning

not certain or confident; feeling doubt

Example

She felt unsure about the decision.

她对这个决定感到不确定。

B2 adjective /ʌnəˈfreɪd/

unafraid

无畏

Meaning

Not feeling fear; brave or courageous

Example

She walked into the dark room, unafraid of what might be inside.

她走进黑暗的房间，无畏里面可能有什么。

C1 adjective /ʌnˈɒnəd/

unhonoured

未受尊敬的

Meaning

not respected or given the recognition that is deserved; treated without honor

Example

He felt unhonoured after his years of service were ignored.

他的多年服务被忽视后，他感到自己未受尊敬。

B2 noun /ʌnˈrest/

Unrest

不安；动荡；社会或政治动乱

Meaning

a state of dissatisfaction and disturbance; social or political disorder

Example

The economic crisis led to widespread social unrest.

经济危机导致了广泛的社会不安。

B2 adjective /ʌnˈfɪt/

Unfit

不适合; 不适当;

Meaning

not in good physical condition; unsuitable or inappropriate

Example

He was declared unfit for military service due to his poor health.

由于健康状况差，他被宣判不适合军事服务。

C1 adjective /ˌʌnɪˈkwɪvəkəl/

unequivocal

明确

Meaning

Leaving no doubt; clear and unambiguous

Example

She gave an unequivocal answer to the question.

她对问题给出了明确的回答。

C1 adjective /ˌʌnkɒnstɪˈtuːʃənəl/

Unconstitutional

违宪的

Meaning

not in accordance with a political constitution; violating constitutional principles

Example

The court declared the new law unconstitutional.

法院宣布这项新法律违宪。

B2 adjective /ʌnˈhɛlpfəl/

unhelpful

没有帮助的

Meaning

not providing help or support; making a situation harder rather than easier

Example

His unhelpful attitude slowed down the entire project.

他没有帮助的态度拖慢了整个项目。

C2 adjective /ˈʌndjʊleɪtɪŋ/

undulating

波动的

Meaning

Having a smoothly rising and falling form or motion like waves.

Example

We drove through undulating hills.

我们驱车穿过起伏的山丘。

C2 adjective /ˌʌltrəˈmɒnteɪn/

ultramontane

教皇支持者

Meaning

beyond the mountains, especially referring to support for the Pope over local church authority

Example

The debate highlighted the ultramontane position in church politics.

辩论突出了教会政治中超山的立场。

C1 adjective ʌnɪnˈhæbɪtəbəl

uninhabitable

不可居住

Meaning

Not suitable or safe for people to live in.

Example

Rapid urbanization can make cities uninhabitable.

快速城市化可能使城市变得无法居住。

C2 verb /ʌnˈfɛtər/

unfetter

解开束缚

Meaning

to release from restraint or restriction; to free

Example

The new law will unfetter small businesses from excessive regulations.

新法律将使小企业免于过多的规定。

C1 verb /ʌnˈsɛtl/

unsettle

扰乱

Meaning

To disturb or make someone feel anxious or uneasy.

Example

The sudden news unsettled the entire community.

突如其来的消息让整个社区感到不安。

C1 adjective /ʌnˈkuːθ/

uncouth

粗鲁

Meaning

Lacking good manners, refinement, or grace; awkward or rough.

Example

His uncouth behavior shocked the guests at the party.

他粗鲁的行为让聚会上的客人感到震惊。

B2 adjective /ˌʌnprɪˈdɪktəbəl/

unpredictable

不可预测的

Meaning

not able to be predicted; changing suddenly and unexpectedly

Example

The weather in this region is highly unpredictable.

这个地区的天气非常不可预测。

B1 adjective /ˌʌnɪmˈpɔːrtənt/

unimportant

不重要的

Meaning

not having much value, significance, or influence

Example

The detail seemed unimportant compared to the main issue.

与主要问题相比，这个细节显得不重要。

C2 noun /ˌjuːzɜːrˈpeɪʃən/

usurpation

篡夺

Meaning

The act of taking someone's power or property illegally or by force.

Example

The general's usurpation of the presidency led to political unrest.

将军对总统职位的篡夺导致了政治动荡。

B2 adverb /ʌnˈdaʊtɪdli/

undoubtedly

毫无疑问

Meaning

without a doubt, certainly

Example

He is undoubtedly the best player on the team.

他毫无疑问是队里最好的球员。

B2 adjective /ʌnˈsiːn/

Unseen

看不见的；未曾看到或注意到的

Meaning

not previously seen or noticed; invisible; hidden

Example

The unseen forces of nature can be very powerful.

自然界的看不见的力量可能非常强大。

C1 noun /ˈʌndərˌteɪkər/

undertaker

殡葬员

Meaning

A person whose job is to prepare the dead for burial and arrange funerals.

Example

The undertaker prepared the body for the funeral service.

殡葬员为葬礼服务准备了尸体。

B1 adjective /ʌnˈlaɪkli/

Unlikely

不太可能; 不大可能

Meaning

not likely to happen; improbable

Example

It's unlikely to rain today with such clear skies.

今天晴空万里，几乎不可能下雨。

C2 adjective /ˈʌŋk.tʃu.əs/

unctuous

阿谀奉承

Meaning

Excessively flattering or ingratiating; oily in texture.

Example

His unctuous tone made everyone uncomfortable.

他那种阿谀奉承的语气让每个人都感到不舒服。

C1 adjective /ʌnˈspiːkəbl/

unspeakable

难以形容

Meaning

too bad or shocking to be expressed in words

Example

The survivors endured unspeakable horrors during the war.

幸存者在战争中忍受了难以形容的恐怖。

B2 adjective /ʌnˈiːzi/

Uneasy

不安的; 焦虑的; 不舒服的

Meaning

worried; anxious; uncomfortable; restless

Example

She felt uneasy about walking alone at night.

她在夜晚独自行走时感到不安。

C2 adjective /ʌnˈʌtərəbl/

unutterable

难以言喻

Meaning

Too great, intense, or awful to be expressed or described in words.

Example

She was filled with unutterable joy at the news of her success.

她听到成功的消息时充满了难以形容的喜悦。

C2 verb /ʌnˈjoʊk/

unyoke

解开

Meaning

To release from a yoke or to free from restraint or obligation.

Example

The farmer unyoked the oxen after a long day of work.

农民在长时间工作后解开了牛的套索。

B2 noun /ʌnˈsɜːrtənti/

Uncertainty

不确定性; 怀疑或缺乏确信

Meaning

the state of being uncertain; doubt or lack of sureness

Example

The uncertainty about the weather delayed our trip.

关于天气的不确定性延迟了我们的旅行。

C2 verb /ˌʌndərˈɡɜːrd/

undergird

支持，强化

Meaning

to provide support or foundation for; to strengthen

Example

Strong values undergird a healthy society.

强大的价值观支撑着一个健康的社会。

C1 adjective /ʌnˈtɛnəbl/

untenable

无法维持

Meaning

not able to be maintained or defended against attack or objection

Example

The politician resigned when his position became untenable.

政治家在他的立场变得无法维持时辞职。

C1 verb /ˌʌn.dəˈtʃɑːrdʒ/

undercharge

收取较少费用

Meaning

To charge less than the correct or fair amount.

Example

The shopkeeper accidentally undercharged me for the groceries.

店主不小心少收了我购买食品的钱。

C2 noun /ɜːrˈbænɪti/

urbanity

都市气质

Meaning

refined courtesy, elegance, and sophistication in manner

Example

Her urbanity made her popular among diplomats and leaders.

她的都市气质让她在外交官和领导人中非常受欢迎。

B1 adjective /ˈɜːrbən/

urban

城市的

Meaning

related to, characteristic of, or situated in a city or town

Example

Urban areas often have higher population density than rural areas.

城市地区通常比乡村地区有更高的人口密度。

B2 verb /ˌʌndərˈskɔːr/

underscore

强调

Meaning

to emphasize or highlight something

Example

The incident underscored the need for better safety measures.

这起事件突显了更好安全措施的必要性。

C2 noun /ˈʌn.dɚˌstɔː.ri/

understory

下层植被

Meaning

The layer of vegetation beneath the main canopy of a forest.

Example

The understory of a rainforest is home to small mammals and insects.

雨林的下层植被是小型哺乳动物和昆虫的家园。

B2 adjective /ˌʌnəˈweər/

Unaware

无意识的; 不知道的; 没有意识

Meaning

not knowing or realizing; having no knowledge of something

Example

She was completely unaware of the danger.

她完全没有意识到危险。

B2 adjective /ʌnˈfeɪ.vər.ə.bəl/

Unfavourable

不利的; 逆境的

Meaning

not helpful or advantageous; adverse

Example

The weather conditions were unfavourable for our outdoor event.

恶劣的天气条件不利于我们的户外活动。

C1 adjective /ʌnˈtʃælɪndʒd/

Unchallenged

无可争议的; 被接受的没有反对; 没有对手

Meaning

not disputed or questioned; accepted without opposition; having no rival

Example

He remained the unchallenged champion for five years.

他五年保持不败的冠军。

C1 noun /ʌpˈhiːvəl/

upheaval

动荡

Meaning

a violent or sudden change or disruption to something

Example

The company faced a major upheaval after the sudden resignation of its CEO.

公司在其CEO突然辞职后经历了巨大的动荡。

B1 adjective /ʌnˈtru/

Untrue

错误的; 不正确的

Meaning

not true; false; incorrect

Example

His statement about the incident was completely untrue.

他关于事件的陈述完全是错误的。

C2 noun /ˌjuːnɪˈtɛəriən/

unitarian

一神论者

Meaning

A person who believes that God exists as one entity rather than as a Trinity; a member of a religious denomination that emphasizes individual freedom of belief.

Example

The Unitarian church is known for its inclusive and open-minded approach.

一神论教会以其包容和开放的思想方式而闻名。

C1 adjective /ˌʌnprɪˈtɛnʃəs/

unpretentious

谦虚的

Meaning

modest; not attempting to impress others with appearance or importance

Example

She lives in an unpretentious home but is very happy.

她住在一个谦虚的家里，但非常快乐。

A2 noun /ʌmˈbrɛlə/

umbrella

伞

Meaning

A device used for protection against rain or sun, typically consisting of a collapsible canopy mounted on a central rod.

Example

She opened her umbrella as it started to rain.

下雨时她打开了她的伞。

B1 adjective /ʌnˈmærid/

unmarried

未婚

Meaning

Not married; single.

Example

He is thirty-five and still unmarried.

他三十五岁，仍然未婚。

B2 adjective /ʌnˈlɔːfl/

Unlawful

非法; 不合法

Meaning

not authorized by law; illegal

Example

The court declared the search unlawful.

法院宣布搜索是非法的。

A1 pronoun /ʌs/

us

我们

Meaning

used to refer to the speaker and one or more other people as the object of a verb or preposition

Example

She gave us a gift.

她给了我们一个礼物。

不道德的

Meaning

Having or showing no moral principles; not honest or fair.

Example

Unscrupulous peers can lead adolescents to delinquency.

不道德的同龄人可能会导致青少年犯罪。