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C2 verb /rɔɪl/

roil

搅动
Meaning
to make a liquid muddy or disturbed; to cause agitation or disorder
Example
The constant protests roiled the city streets.
持续的抗议活动搅动了城市的街道。
C2 noun /ˌbuː.ɡənˈvɪl.i.ə/

Bougainvillea

九重葛
Meaning
a tropical climbing plant with colorful bracts surrounding small flowers
Example
The bougainvillea climbing over the garden wall creates a beautiful purple display.
攀爬在花园墙上的九重葛创造了美丽的紫色展示。
C1 noun əˈɡrɛriən səˈsaɪətiz

agrarian societies

农业社会
Meaning
Societies based on agriculture and farming as the primary economic activity.
Example
Agrarian societies emerged from a need for stable food sources.
农业社会从对稳定食品来源的需求中产生。
C1 adjective /ˈnɑːkʃəs/

noxious

有害的
Meaning
harmful, poisonous, or very unpleasant
Example
The factory released noxious fumes into the air.
工厂释放了有害气体进入空气。
B1 adjective kəˈmɜː.ʃəl

commercial

商业
Meaning
Concerned with or engaged in commerce; having profit as a primary aim rather than artistic or other value.
Example
Commercial hubs attract investments.
商业中心吸引投资。
C1 adjective /ɪˈnɜːrt/

inert

惰性
Meaning
lacking the ability or strength to move or act; chemically inactive
Example
The patient remained inert on the bed.
病人躺在床上保持不动。
C1 verb /plɒd/

plod

缓慢而坚定地工作
Meaning
to work slowly and steadily, often with effort or difficulty
Example
He plodded through his homework despite feeling tired.
尽管他感到疲倦，他还是慢慢地完成了作业。
A2 adverb /ˌdaʊnˈsteəz/

Downstairs

楼下
Meaning
on or to a lower floor of a building
Example
Please go downstairs and wait in the lobby.
请下楼并在大厅等候。
C1 adjective /ɪˈleɪtɪd/

elated

极其高兴
Meaning
Extremely happy and excited.
Example
She was elated when she heard the good news.
她听到好消息时非常高兴。
A2 noun /ˈrɛkɔːd/

record

记录
Meaning
a written or spoken account of something
Example
I kept a record of all the meetings.
我记录了所有的会议。
C1 noun /ˈtrɪkəri/

trickery

Meaning
The use of dishonest methods to deceive or cheat someone.
Example
The politician was accused of winning the election through trickery.
C1 noun ˈkiː.stəʊn ˈspiː.ʃiːz

keystone species

基石物种
Meaning
A species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Example
Wolves are a keystone species that regulate prey populations.
狼是调节猎物种群的基石物种。
B2 noun /ˈskændəl/

scandal

丑闻
Meaning
an event or action that causes public outrage or damage to one's reputation
Example
The politician's affair became a public scandal.
那位政治家的私 affair 成为了公共丑闻。
B1 noun /mæsk/

Mask

面具
Meaning
covering for the face or head; disguise or protection
Example
She wore a mask to protect herself from dust.
她戴上了面具以防尘土。
B2 adverb /ˈmɒdərətli/

moderately

适度地
Meaning
to a reasonable extent, not excessively
Example
She exercises moderately to stay healthy.
她适度地锻炼以保持健康。
C1 noun /ˈmɛdli/

medley

混合
Meaning
A mixture of different things, especially musical tunes combined together.
Example
The band played a medley of popular songs.
乐队演奏了流行歌曲的混合曲目。
B1 adverb /ʌnˈfɔːrtʃənətli/

Unfortunately

不幸地
Meaning
used to express regret or disappointment about something
Example
Unfortunately, the weather was bad for our picnic.
很遗憾，天气不适合我们的野餐。
C1 adjective /rɪˈtɜː.nə.bəl/

Returnable

可退还的
Meaning
able to be returned or given back
Example
The bottle is returnable for a deposit refund.
这瓶瓶子可以退还存款退款。
B1 adjective /rɪˈtaɪərd/

Retired

退休
Meaning
having left one's job and ceased to work; withdrawn from activity
Example
My retired grandfather enjoys gardening in his free time.
我的退休祖父喜欢在空闲时间种花。
A2 noun /bɔːrd/

board

Meaning
a flat, thin, rectangular piece of material such as wood; also a group of people managing an organization
Example
The board decided to increase the budget.
B2 noun /ɪkˈsploʊʒən/

explosion

爆炸
Meaning
a violent burst or release of energy, often causing damage and noise
Example
The explosion shook the entire neighborhood.
爆炸震动了整个社区。
C2 adjective /ˌser.ɪˈməʊ.ni.əs/

ceremonious

正式和有礼貌
Meaning
marked by formality, politeness, or strict observance of customs
Example
He gave her a ceremonious bow before entering the hall.
他在进入大厅之前，给了她一个正式的鞠躬。
C2 adjective /ɪnˈvɪdiəs/

invidious

引起嫉妒的
Meaning
likely to arouse resentment, envy, or anger in others
Example
The manager's invidious remarks created tension among the employees.
经理的嫉妒言论在员工中间造成了紧张气氛。
C1 adjective /dɪsˈpæʃənət/

dispassionate

冷静的
Meaning
not influenced by strong emotion; impartial
Example
The judge remained dispassionate throughout the trial.
法官在整个审判过程中保持冷静。
B2 noun /ˈmɪsaɪl/ or /ˈmɪsəl/

missile

导弹
Meaning
a weapon that is self-propelled and directed toward a target
Example
The army launched a missile towards the enemy base.
军队向敌军基地发射了一枚导弹。
A2 noun /ˈstændərd/

standard

Meaning
a level of quality or achievement, or a measure of comparison
Example
This car meets all the safety standards.
B2 adjective /ˈtɛlɪŋ/

telling

具有启发性
Meaning
Revealing something significant or giving important information.
Example
Her silence was more telling than words.
她的沉默比语言更具启发性。
B2 adjective /ɪnˈtɒlərənt/

intolerant

不宽容
Meaning
unwilling to accept or respect beliefs or behavior different from one's own
Example
He is intolerant of any opinion that differs from his own.
他不能容忍与自己意见不同的任何观点。
B2 verb /əˈstɒnɪʃ/

astonish

使震惊
Meaning
to surprise someone greatly; to fill with sudden wonder or amazement
Example
The magician’s final trick astonished the entire audience.
魔术师的最后一个表演使所有观众感到震惊。
C2 adjective /ˈpɛstɪlənt/

pestilent

致命的
Meaning
Causing or tending to cause death or destruction; harmful or pernicious.
Example
The pestilent atmosphere of the swamp made people sick.
沼泽的致命气氛让人们生病。
C2 verb /traɪˈsɛkt/

trisect

三分
Meaning
To divide into three parts.
Example
The teacher asked the students to trisect the line segment.
老师要求学生将线段分成三部分。
B1 verb /ʃɪft/

shift

转移
Meaning
To move or change from one place, position, or situation to another.
Example
She had to shift her focus to the new project.
她不得不将注意力转向新项目。
C1 noun /ˈprɛəri/

prairie

大草原
Meaning
A large open area of grassland, especially in North America.
Example
The bison roamed freely across the prairie.
野牛在大草原上自由地游荡。
A2 noun /ˈbenɪfɪt/

Benefit

好处; 利益; 益处
Meaning
an advantage or profit gained from something; a helpful or good effect
Example
Exercise has many health benefits for your body.
运动对你的身体有许多健康益处。
B2 adjective /ɪˈmædʒ.ɪ.nər.i/

Imaginary

想象的; 虚构的; 不现实的
Meaning
existing only in imagination; not real; fictional
Example
The child had an imaginary friend who she talked to every day.
那个孩子有一个想象的朋友，每天和他说话。
B2 noun ˈɡloʊbəl ɪˈnɪʃətɪvz

global initiatives

全球倡议
Meaning
Worldwide efforts or programs aimed at addressing global challenges or achieving common goals.
Example
Global initiatives inspire better waste management practices.
全球倡议激发了更好的废物管理实践。
C1 verb /ˌpoʊstˈdeɪt/

postdate

后置日期
Meaning
To assign a date later than the actual date to a document or event.
Example
She postdated the check to next month.
她把支票的日期改为下个月。
C1 noun /læns/

Lance

长矛
Meaning
a long weapon with a sharp metal point, used by soldiers on horseback
Example
The knight charged forward with his lance ready.
骑士带着准备好的长矛向前冲。
C1 verb /ˈiːkwəlaɪz/

equalize

平衡
Meaning
To make equal or level in status, value, or amount.
Example
The team equalized the score in the last minute.
团队在最后一分钟将比分扳平。
C2 noun /bel ˈæp.əl/

Bell apple

钟铃苹果
Meaning
a tropical fruit with a crisp texture and sweet taste, scientifically known as Syzygium malaccense
Example
The bell apple tree produces beautiful red fruits that are popular in tropical regions.
钟铃苹果树结出美丽的红色水果，在热带地区很受欢迎
C1 adjective /ˈærɪd/

arid

干旱的
Meaning
extremely dry; lacking in interest or excitement
Example
The desert is known for its arid climate.
沙漠以其干旱的气候而闻名。
C1 noun /ˈwɪzərdri/

wizardry

魔法技艺
Meaning
The art or practice of magic; great skill or expertise in something.
Example
The programmer's wizardry amazed everyone in the room.
程序员的魔法技艺让房间里的每个人都感到惊讶。
B2 verb /dɪˈmɒlɪʃ/

demolish

拆除
Meaning
to destroy completely, especially a building or structure
Example
The city decided to demolish the old stadium to build a new one.
这座城市决定拆除旧体育场，建造一个新的。
B2 verb /ɪˈlɪmɪneɪt/

eliminate

消除
Meaning
To completely remove or get rid of something.
Example
Eliminate time-wasting habits.
消除浪费时间的习惯。
A2 noun /ˈtɜːrki/

turkey

火鸡 (一种大鸟)
Meaning
a large bird native to North America, often eaten at special occasions like Thanksgiving; also the meat of this bird.
Example
We roasted a turkey for Thanksgiving dinner.
我们为感恩节晚餐烤了一只火鸡。
B2 noun /ˈkruː.əl.ti/

Cruelty

残忍; 非人道的待遇; 导致疼痛的行为
Meaning
behavior that causes pain or suffering to others; the quality of being cruel
Example
The documentary exposed the cruelty of factory farming to animals.
纪录片揭示了工厂养殖对动物的残忍行为。
C2 verb /ˈɡæmbəl/

gambol

开心地跳跃
Meaning
to run or jump about playfully
Example
The lambs gamboled in the field under the sun.
小羊在阳光下在田野里欢快地跳跃。
B2 verb /spɛər/

spare

额外给予 / 节省
Meaning
To give something that one has extra of; to refrain from harming or killing.
Example
Could you spare me a few minutes of your time?
你能给我一些你的时间吗？
C1 noun /ˈfɔːreɪ/

foray

突袭 / 初步尝试
Meaning
A sudden short attack or attempt, especially into new activity or territory.
Example
The company made its first foray into the international market.
公司首次进军国际市场。
B2 adjective /ˌsʌp.lɪˈmen.tər.i/

Supplementary

补充的; 附加的; 额外的
Meaning
completing or making an addition to something; additional; extra
Example
Students need to buy supplementary books for the course.
学生需要为课程购买补充书籍。
C1 adjective /ˈpɑːndərəs/

ponderous

沉重而缓慢
Meaning
slow and clumsy because of great weight; dull and labored
Example
The ponderous lecture made it hard for students to stay awake.
这堂沉重而缓慢的讲座使学生们难以保持清醒。
C1 adjective /ɪɡˈzɪləreɪtɪŋ/

exhilarating

令人振奋的
Meaning
Making someone feel very excited, happy, or thrilled.
Example
Skydiving was the most exhilarating experience of his life.
跳伞是他一生中最令人振奋的经历。
B1 verb /ˈkæri aʊt/

carry out

执行
Meaning
to perform or complete a task; to execute a plan
Example
The team carries out the project successfully.
团队成功执行了项目。
C2 noun /sɒp/

sop

Meaning
a concession or appeasement to pacify someone; also a piece of bread dipped in liquid
Example
The manager offered a bonus as a sop to the unhappy employees.
A2 adjective /fɔːls/

False

虚假; 错误; 欺骗性; 人造
Meaning
not true; incorrect; deceptive; artificial
Example
The witness gave false testimony in court.
证人给出了虚假的证词。
B1 adjective /ˈprɪn.sə.pəl/

Principal

主要的; 首要的; 最重要的; 首席
Meaning
main; primary; most important; chief
Example
The principal reason for the meeting was to discuss the budget.
会议的主要原因是讨论预算。
C1 noun /ˈhɔːr.nət/

Hornet

黄蜂
Meaning
a large wasp that can sting and is often aggressive
Example
The hornet built its nest under the roof.
黄蜂在屋顶下筑巢。
C2 adjective /ˈsɪŋkəˌpeɪtɪd/

syncopated

切分节奏
Meaning
Characterized by displaced beats or rhythms, especially in music.
Example
The jazz piece had a syncopated rhythm that energized the crowd.
这段爵士乐有一个切分节奏，激励了人群。
A2 adverb /twaɪs/

twice

两次
Meaning
two times
Example
I have seen that movie twice.
我看过那部电影两次。
C1 noun /ˈkæzəm/

chasm

裂缝 / 巨大差异
Meaning
a deep fissure in the earth's surface or a wide difference between people or ideas
Example
There was a great chasm between the two political parties.
两个政党之间有一个巨大的裂缝。
B2 noun/verb rɪˈfɔːm

reform

改革
Meaning
Make changes in (something, typically a social, political, or economic institution or practice) in order to improve it.
Example
Reform in the education system was a priority.
教育系统的改革是优先事项。
B2 noun /ˈleɪzər/

laser

激光
Meaning
a device that emits a concentrated beam of light
Example
The doctor used a laser to perform eye surgery.
医生使用激光进行眼部手术。
C1 noun /ˈæbət/

abbot

院长
Meaning
The head of a monastery for monks.
Example
The abbot welcomed the visitors to the monastery.
院长欢迎游客来到修道院。
B2 noun/verb ˈven.tʃər

venture

冒险，企业，创业
Meaning
A risky or daring journey or undertaking; a business enterprise involving considerable risk.
Example
His new venture into e-commerce proved successful.
他在电子商务方面的新事业取得了成功。
C2 noun /ˈmɪsənˌθroʊp/

misanthrope

厌人者
Meaning
a person who dislikes or distrusts humankind
Example
The old man was considered a misanthrope who avoided all social gatherings.
这个老人被认为是一个回避所有社交活动的厌人者。
C2 noun /ˈpɜːrkwɪzɪt raɪt/

perquisiteperquisiteright

额外福利的权利
Meaning
a legal right to certain benefits or privileges associated with a job or office
Example
The judge enjoyed certain perquisite rights attached to his position.
法官享受了与其职位相关的某些额外福利。
B2 noun, verb /ˈpɛdəl/

pedal

脚操作的杠杆
Meaning
A foot-operated lever for powering or controlling a mechanism, especially on a bicycle.
Example
He pressed down hard on the bicycle pedal.
他用力踩下了自行车的踏板。
C2 noun /ˈbʊljən/

bullion

金或银的原料
Meaning
Gold or silver in bulk before being coined or made into jewelry.
Example
The bank stores gold bullion in its vaults.
银行将金条储存在它的保险库中。
B2 verb /ˈspɛsɪfaɪ/

specify

指定
Meaning
to state or describe something clearly and exactly
Example
Please specify the time and place of the meeting.
请明确指定会议的时间和地点。
C1 adjective /səbˈdʒɛktɪv/

subjective

主观的
Meaning
based on personal feelings, tastes, or opinions rather than facts
Example
Beauty is often considered a subjective concept.
美丽通常被视为一个主观的概念。
C1 noun /dɪˈrɪʒən/

derision

嘲笑
Meaning
Contemptuous ridicule or mockery.
Example
His ideas were greeted with derision by the audience.
他的观点被观众嘲笑了。
B2 noun /ˈek.oʊ/

Echo

回声; 回响
Meaning
a sound that is reflected back; a repetition or imitation
Example
His voice created a clear echo in the empty cathedral.
他的声音在空荡的教堂里产生了清晰的回声。
B1 noun /ˈsʌməri/

summary

总结
Meaning
A brief statement of the main points of something.
Example
She wrote a summary of the book for her class.
她为她的课堂写了一份书籍总结。
C2 adjective /ˈfæn.sɪ.ləs/

fanciless

没有想象力的，普通的
Meaning
without imagination or creativity; plain or ordinary
Example
His drawings were simple and fanciless.
他的画作既简单又没有想象力。
C1 adjective /sliːk/

sleek

光滑且闪亮
Meaning
smooth, shiny, and stylish
Example
She drove a sleek black sports car.
她开着一辆闪亮的黑色跑车。
C1 adjective /dɪsˈɪntrəstɪd/

disinterested

无私
Meaning
not influenced by personal interest; impartial or neutral
Example
The judge remained disinterested in the case.
法官在案件中保持无私。
A2 noun /əˈtɛnʃən/

attention

注意
Meaning
the act of focusing on something or someone
Example
The teacher asked for the students' attention.
老师要求学生们的注意。
C2 noun phrase /ˌhjuː ən ˈkraɪ/

hue and cry

抗议声
Meaning
A loud public outcry or protest, often demanding action.
Example
There was a hue and cry over the new policy changes.
因新政策变化，爆发了激烈的抗议声。
C2 verb /flɛdʒ/

fledge

飞翔
Meaning
To develop wing feathers large enough for flight; to bring up until able to fly.
Example
The young birds will fledge in a few weeks.
年轻的鸟将在几周内学会飞行。
C1 noun /ˈmæɡneɪt/

Magnate

富豪; 商业界或工业界的富有且有权势的人
Meaning
A wealthy and powerful businessperson or industrialist
Example
The oil magnate owned dozens of refineries across the country.
石油富豪拥有全国各地的数十座炼油厂。
B1 adjective /ɪnˌθjuːziˈæstɪk/

enthusiastic

热情的
Meaning
Having or showing intense and eager enjoyment, interest, or approval.
Example
The explorers were enthusiastic about the journey.
探险者对这次旅行充满热情。
C1 adjective /ˌkɒzməˈpɒlɪtən/

cosmopolitan

全球化
Meaning
familiar with and at ease in many different countries and cultures
Example
He has a cosmopolitan outlook due to his extensive travels.
由于他的广泛旅行，他拥有全球化的视野。
B2 noun/verb /ˈoʊvərˌdoʊs/

overdose

过量服药
Meaning
An excessive and dangerous amount of a drug; to take too much of a substance.
Example
He was rushed to the hospital after a drug overdose.
他因毒品过量被送进了医院。
A1 adjective /tɔːl/

tall

高
Meaning
having a greater than average height
Example
He is the tallest player on the team.
他是队里最高的球员。
C1 adjective, verb /sɪˈdeɪt/

sedate

镇静
Meaning
calm, quiet, and composed; or to administer a drug to make someone calm or sleep
Example
The nurse sedated the patient before the operation.
护士在手术前给病人注射了镇静剂。
B2 adjective /ˈʃɔːrt ˌsaɪtɪd/

Short-sighted

近视; 短期视野
Meaning
lacking foresight or consideration for the future; myopic
Example
His short-sighted decision to quit school early affected his career prospects.
他短视的决定早早离开学校影响了他的职业前景。
B1 adjective /ˈrʊr.əl/

Rural

农村的
Meaning
relating to the countryside; characteristic of farming or country life
Example
She grew up in a rural area far from the city.
她在离城市很远的农村地区长大。
B2 noun /ˈmɒdəreɪtər/

moderator

主持人
Meaning
A person who leads or oversees discussions, debates, or forums to maintain order.
Example
The moderator asked each panelist to share their views.
主持人让每位小组成员分享他们的观点。
C1 noun /ədˈhiːʒən/

adhesion

附着
Meaning
the process or state of sticking to something
Example
Strong adhesion is needed for the tiles to stay in place.
瓷砖保持在原位需要强附着力。
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, verb /ˈædvɜːrt/

advert

Meaning
(noun) a notice or announcement in a public medium promoting a product, service, or event; (verb) to refer to something in speaking or writing
Example
The company placed an advert in the newspaper for the new position.
C1 adjective /ˈkɔːrdiəl/

Cordial

亲切的; 真诚的; 热情的
Meaning
warmly friendly; sincere; heartfelt
Example
She gave us a cordial welcome at the front door.
她在门口给了我们热情的欢迎。
B2 noun /ˈtjuːmər/

tumor

肿瘤
Meaning
an abnormal mass of tissue caused by excessive cell growth
Example
The doctor found a benign tumor during the medical check-up.
医生在体检过程中发现了一个良性肿瘤。
B1 verb /əˈsuːm/

assume

假设
Meaning
to think that something is true without proof
Example
I assume he will be late to the meeting.
我假设他会迟到会议。
B2 noun /ˈɡreɪv.jɑːrd/

Graveyard

墓地
Meaning
an area of land set aside for burial of the dead; a cemetery
Example
The old graveyard near the church dates back to the 18th century.
靠近教堂的老墓地可以追溯到18世纪。
C1 noun /ˈfjuː.dʒə.tɪv/

Fugitive

逃犯
Meaning
a person who has escaped from a place or is in hiding, especially to avoid arrest
Example
The police launched a manhunt to capture the fugitive who escaped from prison.
警方展开了追捕行动，试图抓捕从监狱逃跑的逃犯。
A1 adjective /hɒt/

Hot

热的; 温暖的; 灼热的;
Meaning
having high temperature; warm; heated;
Example
The coffee is too hot to drink.
咖啡太热了，不能喝。
A2 noun /ˈfɑːr.mər/

Farmer

农民
Meaning
a person who grows crops or raises animals for food or profit
Example
The farmer planted rice in the fertile fields this season.
本季，农民在肥沃的田地里种植了水稻。
C2 noun /krəˈnɒmɪtər/

chronometer

计时器
Meaning
An instrument for measuring time precisely, especially used in navigation.
Example
The sailor relied on the chronometer to determine his position at sea.
水手依靠计时器来确定他在海上的位置。
C1 adjective /ˈkjuːmjələtɪv/

cumulative

累积的
Meaning
Increasing gradually by addition; growing in quantity, force, or effect.
Example
The cumulative effect of stress can harm your health.
压力的累积效应可能对您的健康造成伤害。
C1 noun /ˈɛkstrəˌvɜːrt/

extrovert

外向者
Meaning
a person who is outgoing, sociable, and energized by being around other people
Example
As an extrovert, she enjoys meeting new people at social events.
作为一个外向者，她喜欢在社交活动中认识新朋友。
C2 noun /pəˈtruːn/

poltroon

懦夫
Meaning
a cowardly person
Example
He acted like a poltroon during the crisis.
他在危机中像个懦夫一样表现。
A2 noun ˈsaɪən.tɪst

scientist

科学家
Meaning
A person who is studying or has expert knowledge of one or more of the natural or physical sciences.
Example
The scientist proposed data-driven reforms.
这位科学家提出了基于数据的改革。
A1 noun /ˈkʌl.ər/

Colour

颜色
Meaning
the property possessed by an object of producing different sensations on the eye as a result of the way it reflects light; hue, tint, shade
Example
What is your favorite colour for painting the bedroom walls?
你最喜欢的卧室墙面涂什么颜色？
C1 adjective /ræmˈbʌŋk.ʃəs/

rambunctious

喧闹的
Meaning
boisterous, energetic, and difficult to control.
Example
The rambunctious children filled the house with noise.
那些喧闹的孩子让屋子充满了噪音。
A2 noun /ˈstrɔːbəri/

Strawberry

草莓
Meaning
a small red heart-shaped fruit with tiny seeds on the surface and sweet taste
Example
I love eating fresh strawberries with cream during summer.
我喜欢在夏天吃新鲜的草莓配奶油。
C1 noun /ˈnaɪt.fɔːl/

nightfall

夜幕降临
Meaning
the time when night begins; dusk
Example
They decided to return home before nightfall.
他们决定在夜幕降临之前回家。
C1 noun /rɪˈvʌlʃən/

revulsion

厌恶
Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
她看到残忍的行为时感到厌恶。
C1 noun /ˈmʌltɪtuːd/

multitude

大量
Meaning
A large number of people or things.
Example
A multitude of fans gathered at the stadium.
大量的粉丝聚集在体育场。
A2 noun /ˈsɒftweə/

software

软件
Meaning
the programs and other operating information used by a computer
Example
He installed the software to enhance the performance of his computer.
他安装了软件以提高计算机的性能。
C1 noun /ˈpɛrəntɪdʒ/

parentage

家族背景
Meaning
The identity and origins of one's parents; descent or lineage.
Example
Her noble parentage gave her access to the royal court.
她的高贵家族背景使她有机会进入皇宫。
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。
B2 noun /ˈfræk.ʃən/

Fraction

分数; 部分
Meaning
a numerical quantity that is not a whole number; a small or tiny part of something
Example
Only a small fraction of the population voted in the local election.
只有一小部分人口在当地选举中投票。
C1 noun /kənˈvʌl.ʃən/

convulsion

抽搐
Meaning
a sudden, violent, involuntary contraction of muscles; a seizure
Example
The medicine helped prevent convulsions in children.
药物帮助预防儿童的抽搐。
B1 verb ɪkˈspændɪŋ

expanding

扩展
Meaning
Becoming larger or more extensive; increasing in size, number, or importance.
Example
Expanding education opportunities helps reduce inequality.
扩展教育机会有助于减少不平等。
C1 verb /ˈstɪntɪŋ/

stinting

吝啬地给
Meaning
to supply sparingly or with restrictions
Example
He never stinting his efforts to help the poor.
他从不吝啬自己的努力来帮助穷人。
C2 noun /ˌfoʊˈtɑːmɪtər/

photometer

光度计
Meaning
an instrument for measuring the intensity of light
Example
The scientist used a photometer to measure the light in the laboratory.
科学家在实验室里使用光度计来测量光线。
A2 adjective /əˈwɛər/

aware

意识到
Meaning
having knowledge or perception of a situation or fact
Example
She is aware of the risks involved.
她意识到其中的风险。
C2 verb /ˈrʌmpəl/

rumple

弄皱
Meaning
to make something untidy or wrinkled by creasing or crumpling
Example
She accidentally rumpled her dress while packing.
她在打包时不小心弄皱了她的裙子。
C2 noun /ˌpraɪvəˈtɪə/

privateer

私人战舰
Meaning
A privately owned armed ship authorized by a government to attack enemy ships during war.
Example
The privateer captured several enemy vessels during the conflict.
在冲突中，私人战舰俘获了多个敌方船只。
C1 adjective /ɪˈstreɪndʒd/

estranged

疏远
Meaning
no longer close or affectionate with someone; alienated
Example
She felt estranged from her family after the long dispute.
她在长时间的争执后感到与家人疏远。