B2 noun /ˈruːmər/

Rumour

流言; 八卦; 新闻

Meaning

a currently circulating story or report of uncertain or doubtful truth; gossip

Example

There's a rumour that the company will close next month.

有传言说公司将在下个月关闭。

B2 noun /ˌriːprəˈdʌkʃən/

reproduction

繁殖, 再生产

Meaning

The process of producing offspring; the act of copying or duplicating.

Example

The textbook included a detailed diagram of human reproduction.

课本中包含了人类繁殖的详细图表。

B2 verb /rɪˈzɛnt/

resent

怨恨

Meaning

to feel bitterness or displeasure about something or someone

Example

She began to resent the constant criticism from her boss.

她开始对老板的不断批评感到愤恨。

B2 adverb /ˈraɪtli/

Rightly

正确地; 适当地; 公正地

Meaning

correctly; properly; justly

Example

She rightly pointed out the mistakes in the report.

她正确地指出了报告中的错误。

B2 verb /rɪˈɡeɪn/

regain

恢复

Meaning

to get back something that was lost; to recover

Example

He regains his strength after the illness.

他在生病后恢复了力量。

B2 noun rɪˈzɪl.i.əns

resilience

韧性

Meaning

The ability to recover quickly from difficulties; toughness.

Example

Testing the resilience of wood is crucial.

测试木材的韧性是至关重要的。

B2 noun /ræntʃ/

ranch

牧场

Meaning

a large farm where animals such as cattle or sheep are raised

Example

They own a huge cattle ranch in Texas.

他们在德克萨斯州拥有一个巨大的牧场。

B2 noun /ræk/

Rack

架子

Meaning

a framework or structure for holding or storing things

Example

She hung her coat on the rack by the door.

她把外套挂在门旁的架子上。

B2 noun /rɪb/

Rib

肋骨

Meaning

one of the curved bones that protect the chest and lungs

Example

He broke his rib in the accident.

他在事故中断了一根肋骨。

B2 verb /rɪˈzɛmbəl/

resemble

像

Meaning

to look like or be similar to something or someone

Example

She resembles her mother in both appearance and mannerisms.

她在外貌和举止上都像她母亲。

B2 noun /ˈrɪə.lɪ.zəm/

realism

现实主义

Meaning

The quality of representing things as they are; a practical or factual view.

Example

Her paintings are admired for their realism.

她的画作因其现实主义而受到赞赏。

B2 verb /ˌriːjuˈnaɪt/

reunite

重聚

Meaning

to bring together again after separation

Example

The family was reunited after many years.

这个家庭在许多年后重新团聚。

B2 noun rɪsk ˈfæktər

risk factor

风险因素

Meaning

Something that increases the likelihood of developing a disease or condition

Example

Water pollution is a significant risk factor for health.

水污染是健康的一个重要风险因素。

B2 verb /ˈroʊ.teɪt/

rotate

旋转

Meaning

to turn around a central point or axis

Example

The Earth rotates on its axis once every 24 hours.

地球每24小时围绕其轴线旋转一次。

B2 noun /rʌst/

Rust

铁锈

Meaning

reddish-brown coating formed on iron or steel by oxidation; corrosion

Example

The old car was covered in rust after years of neglect.

那辆旧车在多年忽视之后被铁锈覆盖。

B2 noun /ˌriː.əˈʃʊr.əns/

Reassurance

安慰

Meaning

comfort or confidence given to someone to remove their fears or doubts

Example

She needed reassurance that everything would be okay.

她需要得到安慰，以确认一切都会好起来。

B2 noun /rɪˈfjuː.zəl/

Refusal

拒绝; 拒绝接受

Meaning

the act of saying no to something or not accepting something

Example

His refusal to cooperate made the project more difficult.

他拒绝合作让项目变得更难。

B2 verb /rɪˈnuː/

renew

Meaning

to make something new again or extend its period of validity

Example

I need to renew my passport before traveling.

B2 verb /ˈreɪn.dʒɪŋ/

ranging

波动

Meaning

Extending or varying between limits.

Example

The temperatures are ranging from 15 to 30 degrees this week.

本周气温在15到30度之间波动。

B2 noun, verb /ˈriːteɪl/

retail

零售

Meaning

the sale of goods to the public in small quantities for use or consumption rather than for resale

Example

The company specializes in the retail of clothing and accessories.

公司专注于服装和配件的零售业务。

B2 adjective /ˈrɑː.ki/

Rocky

崎岖的; 不稳定的; 困难的

Meaning

full of rocks; unsteady; difficult

Example

The rocky path made hiking difficult for the tourists.

崎岖的小路让游客们的远足变得困难。

B2 noun /reɪdʒ/

rage

愤怒

Meaning

intense anger or fury

Example

She shouted in a fit of rage after hearing the news.

她听到消息后在愤怒中大喊。

B2 noun ˌriːkənˈstrʌkʃn

reconstruction

重建

Meaning

The action or process of reconstructing or being reconstructed.

Example

The reconstruction project took years.

重建项目花了几年时间。

B2 noun /ˌrek.riˈeɪ.ʃən/

Recreation

娱乐活动; 使某物再次存在的过程

Meaning

an activity that is done for enjoyment; the process of making something exist again

Example

The park provides recreation facilities for children and adults.

公园为儿童和成人提供娱乐设施。

B2 verb /rɪˈsaɪt/

recite

背诵

Meaning

To say aloud something learned, especially poetry or text, from memory.

Example

The child recited a poem in front of the class.

孩子在班级前朗诵了一首诗。

B2 adjective /rɪˈzɜːrvd/

Reserved

内向的; 保守的

Meaning

slow to reveal emotion or opinions; restrained in manner

Example

She is quite reserved and doesn't talk much in meetings.

她相当内向，在会议中很少讲话。

B2 noun, verb /ræmp/

ramp

坡道

Meaning

a sloping surface joining two different levels; as a verb, to increase or rise sharply

Example

The car drove up the ramp into the parking garage.

汽车驶上了停车场的坡道。

B2 adjective /ˈreɪʃəl/

racial

种族的

Meaning

relating to a race of people

Example

Racial equality is an important issue in many societies.

种族平等是许多社会中的一个重要问题。

B2 noun /ˈruːlɪŋ/

ruling

裁决

Meaning

an official decision made by a judge or authority.

Example

The court’s ruling favored the defendant.

法院的裁决对被告有利。

B2 noun/verb /ræft/

raft

筏

Meaning

A flat structure made of logs or planks tied together, used as a boat or floating platform; to travel or transport on such a structure.

Example

They built a raft to cross the river.

他们建造了一只筏子来过河。

B2 noun /ˈrɪk.ʃɔː/

Rickshaw

人力车

Meaning

a light two-wheeled passenger vehicle drawn by one or more people

Example

We took a rickshaw to reach the busy marketplace.

我们乘坐人力车前往繁忙的市场。

B2 noun /ˌrɛɡ.jʊˈleɪ.ʃən/

regulation

由权威制定和维护的规则或指令

Meaning

A rule or directive made and maintained by an authority.

Example

Government regulation ensures fair business practices.

政府规则确保公平的商业实践。

B2 verb /ˈrendər/

render

提供

Meaning

to provide or give; to make or cause to become

Example

The artist renders the scene beautifully.

艺术家美丽地渲染了场景。

B2 noun rɪˈsɛʃ.ən

recession

经济衰退

Meaning

A period of temporary economic decline during which trade and industrial activity are reduced.

Example

The country faced a severe recession due to the financial crisis.

由于金融危机，该国面临严重的经济衰退。

B2 noun /ˈreb.əl/

Rebel

叛徒

Meaning

a person who resists authority or control

Example

The young rebel refused to follow the school rules.

那个年轻的叛徒拒绝遵守学校的规定。

B2 adjective /rɪˈspɒn.sɪv/

Responsive

响应的

Meaning

reacting quickly and positively; readily reacting to suggestions or changes

Example

The website is very responsive and loads quickly on all devices.

这个网站非常响应，能快速加载所有设备。

B2 noun /rɪˈmeɪn.dər/

Remainder

剩余部分; 剩下的东西

Meaning

the part that is left over; what remains after the other parts have been taken away

Example

The remainder of the food was stored in the refrigerator.

剩下的食物被存放在冰箱里。

B2 verb /reɪn/

reign

统治

Meaning

to rule as a king or queen; to be dominant

Example

The queen reigned for over sixty years.

女王统治了超过六十年。

B2 adjective /rɪˈliːvd/

relieved

松了一口气

Meaning

feeling happy and less worried after something stressful has been removed or resolved

Example

She felt relieved after hearing the good news.

听到好消息后，她感到松了一口气。

B2 verb /reɪp/

rape

强奸

Meaning

to force someone to have sexual intercourse without their consent

Example

The law strictly punishes those who commit rape.

法律严惩那些犯强奸罪的人。

B2 noun ˌreɪdɪˈeɪʃən

radiation

辐射

Meaning

The emission of energy as electromagnetic waves or as moving subatomic particles.

Example

Radiation from the sun can be harmful without protection.

太阳的辐射没有保护可能是有害的。

B2 adjective /rɪˈfaɪnd/

Refined

精致的; 纯净的

Meaning

elegant and cultured in appearance, manner, or taste; purified

Example

She has very refined taste in art and music.

她对艺术和音乐有非常精致的品味。

B2 verb /rɪˈtriːv/

retrieve

找回

Meaning

to get something back that was lost or taken; to recover

Example

She managed to retrieve her lost phone from the taxi.

她成功地从出租车中找回了她丢失的手机。

B2 verb /ˈræm.bəl/

ramble

Meaning

to talk or write at length in a confused or inconsequential way; to walk for pleasure without a fixed route.

Example

He rambled on about his childhood for hours.

B2 verb /ˌriːkriˈeɪt/

recreate

重新创建

Meaning

to create or produce something again, especially a new version of something lost or destroyed

Example

The team recreated the lost dataset from backups.

团队从备份中重新创建了丢失的数据集。

B2 adjective ˈræd.ɪ.kəl

radical

能够带来根本性变化，反对传统的信仰或系统

Meaning

Capable of bringing fundamental changes opposite to conventional beliefs or systems.

Example

The leader proposed radical economic reforms.

领导人提议进行激进的经济改革。

B2 noun /roʊˈteɪʃən/

Rotation

旋转; 转动; 自转

Meaning

the action of rotating around an axis or center; a single turn

Example

The Earth's rotation takes 24 hours to complete.

地球的自转需要24小时才能完成。

B2 verb /rɪˈzuːm/

resume

重新开始

Meaning

to start again after a pause or interruption

Example

We will resume the meeting after lunch.

我们将在午餐后继续会议。

B2 noun/adjective /rɪˈpʌblɪkən/

republican

共和党人

Meaning

a member or supporter of a republican political party or system

Example

The republican candidate won the election.

共和党候选人赢得了选举。

B2 adjective /ˈrʌn daʊn/

run-down

破旧的

Meaning

in a poor condition; worn out or neglected

Example

They live in a run-down house at the edge of town.

他们住在城市边缘的一座破旧的房子里。

B2 noun /ˈrep.taɪl/

Reptile

爬行动物

Meaning

a cold-blooded animal with scaly skin that lays eggs on land

Example

The lizard is a common reptile found in gardens.

蜥蜴是一种常见的爬行动物，常见于花园中。

B2 noun /rɪˈdʒɛkʃən/

rejection

拒绝

Meaning

the action of refusing or dismissing something or someone

Example

Her rejection of the offer surprised everyone.

她拒绝了这个提议，令所有人吃惊。

B2 noun ˈrɛstɪŋ pleɪs

resting place

安息地

Meaning

A place where someone or something rests, especially a burial site.

Example

The resting place of the martyrs is near the river.

烈士的安息地靠近河流。

B2 noun /ˈruːdnəs/

Rudeness

粗鲁

Meaning

the quality of being impolite, discourteous, or offensive in behavior or speech

Example

His rudeness shocked everyone at the dinner party.

他的粗鲁在晚宴上震惊了所有人。

B2 adjective /ˈruː.tɪd/

Rooted

根深蒂固的

Meaning

deeply established; firmly fixed

Example

His beliefs are deeply rooted in tradition.

他的信念深深扎根于传统。

B2 verb /rɪˈfreɪn/

refrain

避免

Meaning

To hold oneself back from doing something.

Example

Please refrain from smoking in this area.

请勿在此区域内吸烟。

B2 verb /rɪˈzɑlv/

resolve

解决

Meaning

to solve a problem; to decide firmly

Example

The manager resolves the conflict between employees.

经理解决了员工之间的冲突。

B2 noun /ˈrɛlɪvəns/

relevance

resilient

韧性

Meaning

Able to withstand or recover quickly from difficult conditions.

Example

Resilient materials ensure durability.

韧性材料确保耐用性。

B2 adjective /ˈruːθ.ləs/

Ruthless

无情的; 残忍的; 毫无怜悯的

Meaning

showing no pity or compassion; cruel; merciless

Example

The ruthless dictator showed no mercy to his enemies.

那个冷酷的独裁者对他的敌人毫不留情。

B2 noun /reɪk/

Rake

耙子

Meaning

a garden tool with a long handle and prongs for gathering leaves; to gather with a rake

Example

He used a rake to gather the fallen autumn leaves.

他用耙子收集掉落的秋天叶子。

B2 noun /ˈrɛfjuːdʒ/

refuge

避难所

Meaning

a place that provides shelter or protection from danger or distress

Example

The villagers took refuge in the temple during the storm.

村民们在风暴期间躲进了寺庙避难。

B2 verb /rɪˈzɪst/

resist

抵抗

Meaning

to oppose or fight against; to withstand

Example

He could not resist the temptation.

他无法抵抗诱惑。

B2 noun ˌrɛzɪɡˈneɪʃən

resignation

辞职

Meaning

The acceptance of something undesirable but inevitable; giving up.

Example

Her resignation from the position was unexpected.

她辞去了职位，这是出乎意料的。

B2 verb /ˈræl.i/

rally

Meaning

to come together for a common purpose or to recover strength or spirit

Example

The team rallied after halftime and won the match.

B2 adjective /ˈrɪski/

risky

Meaning

Involving the possibility of danger, harm, or loss

Example

Investing in that startup is risky but could bring high rewards.

B2 verb /rɪˈtriːt/

retreat

撤退

Meaning

to move back or withdraw from a position or situation

Example

The soldiers had to retreat after losing the battle.

士兵们在失去战斗后不得不撤退。

B2 adjective /rɪˈlʌktənt/

Reluctant

不情愿的; 犹豫的; 不愿意做某事;

Meaning

unwilling; hesitant; disinclined to do something;

Example

She was reluctant to share her personal information.

她不情愿分享个人信息。

B2 verb /rɪˈkʌvərɪŋ/

recovering

恢复

Meaning

the process of getting better after illness, loss, or difficulty

Example

She is still recovering from the flu.

她还在从流感中恢复。

B2 noun rɪˈkruːt.mənt

recruitment

招聘

Meaning

The action of finding new people to join an organization or support a cause.

Example

Recruitment strengthens the workforce.

招聘增强了劳动力。

B2 adjective /raɪp/

Ripe

成熟的; 准备食用

Meaning

fully developed and ready to eat; mature; ready for action or use

Example

The bananas are ripe and ready to eat.

香蕉已经成熟，准备食用。

B2 noun /ˈruːstər/

rooster

公鸡

Meaning

A male domestic chicken, especially one that crows.

Example

The rooster crowed at dawn, waking up the whole village.

公鸡在黎明时分打鸣，唤醒了整个村庄。

B2 noun /rɪˈstreɪnt/

Restraint

克制; 自我控制

Meaning

the action of keeping someone or something under control; self-control

Example

She showed great restraint in not responding to the criticism.

她在不回应批评时表现出极大的克制。

B2 noun /rɪˈsɪp.i.ənt/

Recipient

接收者

Meaning

a person who receives something

Example

She was the recipient of the prestigious award.

她是这个著名奖项的接收者。

B2 adjective /ˈrɪtʃ.u.əl/

Ritual

仪式

Meaning

relating to religious or ceremonial practices

Example

The wedding ceremony included many traditional ritual elements.

婚礼仪式包括许多传统的仪式元素。

B2 noun /rɪˈvendʒ/

Revenge

复仇

Meaning

the action of inflicting hurt or harm on someone for an injury or wrong suffered at their hands

Example

She sought revenge against those who betrayed her trust.

她寻求复仇，针对那些背叛她信任的人。

B2 noun /ˈrerəti/

Rarity

稀有的状态; 不常见或稀缺的东西

Meaning

the state of being rare; something that is uncommon or scarce

Example

The antique vase was a rarity worth thousands of dollars.

古董花瓶是一种稀有物品，价值数千美元。

B2 noun ˌrɛvəˈluːʃən

revolution

革命

Meaning

A forcible overthrow of a government or social order, in favor of a new system.

Example

The story is set during the French Revolution.

故事发生在法国大革命期间。

B2 noun /rɪm/

rim

边缘

Meaning

the outer edge or border of a circular object

Example

The coffee cup had a chip on its rim.

咖啡杯的边缘有个裂痕。

B2 noun ˌriːfɔːˈreɪʃən

reforestation

重新造林

Meaning

The natural or intentional restocking of existing forests and woodlands that have been depleted.

Example

Reforestation efforts are crucial to restoring ecosystems.

重新造林的努力对恢复生态系统至关重要。

B2 noun, verb /ræŋks/

ranks

军衔

Meaning

Positions within a group, especially in a hierarchy or organization.

Example

He quickly moved up the ranks of the army.

他迅速在军队中晋升。

B2 noun /ˈrɛlɪvənsi/

relevancy

rod

细长的棒子，尤其是金属或木制的

Meaning

a thin straight bar, especially of metal or wood

Example

He used an iron rod to support the structure.

他用铁棒支撑结构。

B2 adjective /ˌrez.ɪˈden.ʃəl/

residential

住宅

Meaning

Designed for people to live in.

Example

The institution was fully residential.

该机构是完全住宅性质的。

B2 verb /rɒt/

rot

腐烂

Meaning

to decay or decompose; to become corrupt

Example

The fruit will rot if left in the sun.

水果如果暴露在阳光下会腐烂。

B2 adjective /rɪˈsɔːrsfəl/

resourceful

Meaning

Having the ability to find quick and clever ways to overcome difficulties.

Example

She is very resourceful when it comes to solving unexpected problems.

B2 noun /rɪˈbel.jən/

Rebellion

起义

Meaning

an act of armed resistance to an established government or leader

Example

The rebellion against the king lasted for three years.

反抗国王的起义持续了三年。

B2 verb /riːˈɔːrɡənaɪz/

reorganize

重新组织

Meaning

to arrange something again in a different way for greater efficiency or order

Example

The manager decided to reorganize the team structure.

经理决定重新组织团队结构。

B2 noun /ˈreɪ.zɪnz/

Raisins

葡萄干

Meaning

dried grapes, often used in cooking and baking

Example

She added raisins to the oatmeal cookies for extra sweetness.

她在燕麦饼干中加入了葡萄干，以增加甜味。

B2 verb /ˌriːˈbɪld/

rebuild

重建

Meaning

to build something again after it has been damaged or destroyed

Example

The villagers worked together to rebuild the bridge after the flood.

村民们一起努力，在洪水后重建了桥梁。

B2 noun /ˈruːmər/

rumor

谣言

Meaning

a currently circulating story or report of uncertain or doubtful truth.

Example

There’s a rumor that the company will merge next year.

有传闻说公司明年将合并。

B2 verb /ˈruːɪn/

ruin

毁灭

Meaning

to destroy or damage beyond repair; to spoil completely

Example

Heavy rain could ruin our picnic plans.

大雨可能会毁掉我们的野餐计划。

B2 noun /ˌriː.ɪnˈfɔːrs.mənt/

reinforcement

强化

Meaning

Strengthening or supporting something, especially behavior or learning.

Example

Positive reinforcement helps in learning.

积极的强化有助于学习。

B2 adjective /ˈrɪdʒ.ɪd/

Rigid

严格

Meaning

hard and stiff; not able to bend; strict and unwilling to change

Example

The company has a rigid dress code that all employees must follow.

公司有严格的着装要求，所有员工都必须遵守。

B2 adjective /ˈrɪdən/

ridden

充斥

Meaning

Full of or dominated by something unpleasant.

Example

The country was ridden with corruption.

这个国家充斥着腐败。

B2 adverb /rɪˈmɑːrkəbli/

remarkably

引人注目地

Meaning

in a way that is worthy of attention or notice; surprisingly

Example

She did remarkably well in the competition.

她在比赛中表现得引人注目。

B2 adjective rɪˈnaʊnd

renowned

著名

Meaning

Known or talked about by many people; famous.

Example

The renowned scientist led the reform panel.

著名的科学家领导了改革小组。

B2 noun /rɪˈhɜːr.səl/

Rehearsal

彩排; 演出排练

Meaning

a practice performance of a play, concert, or other work for later public performance

Example

The final rehearsal before opening night went perfectly.

开幕夜前的最后一次彩排非常完美。

B2 adjective /rɪˈɡret.ə.bəl/

Regrettable

令人遗憾的; 不幸的; 可惜的

Meaning

causing or deserving regret; unfortunate; deplorable

Example

It is regrettable that so many talented people left the company.

很遗憾这么多有才华的人离开了公司。

B2 noun /reɪˈʒiːm/

regime

政权

Meaning

a system or form of government, often authoritarian

Example

The military regime controlled the country for decades.

军事政权控制了这个国家几十年。

B2 noun, verb /rɪˈzɔːrt/

resort

度假村 / 最后的选择

Meaning

A place for rest or recreation; to turn to something for help or solution.

Example

They stayed at a beach resort during their vacation.

他们在度假期间住在海滩度假村。

B2 adjective ˌriːprəˈdʌktɪv

reproductive

繁殖的

Meaning

Relating to the reproduction of offspring.

Example

The reproductive cycle of pests can cause rapid infestations.

害虫的繁殖周期可能导致快速的感染。

B2 verb /rɪˈzaɪd/

reside

居住

Meaning

to live or dwell in a particular place

Example

They reside in a large house near the river.

他们住在河边的一座大房子里。

B2 noun /ˈrɪb.ən/

ribbon

缎带

Meaning

a long, narrow strip of fabric used for tying or decoration

Example

She tied her hair with a red ribbon.

她用一条红色的缎带绑住了她的头发。

B2 noun /ˈreɪsɪzəm/

racism

种族主义

Meaning

the belief that some races are superior to others, leading to unfair treatment or prejudice

Example

The organization works to eliminate racism in all forms.

该组织致力于消除所有形式的种族主义。

B2 noun /rɪˈvaɪ.vəl/

Revival

复兴

Meaning

an improvement in the condition or strength of something; renewed interest in or attention to something

Example

There has been a revival of interest in traditional crafts.

传统手工艺的兴趣得到了复兴。

B2 noun /ˈroʊ.lɪŋ pɪn/

Rolling pin

擀面杖

Meaning

a cylindrical tool used for rolling out dough or pastry

Example

Roll the dough flat with a rolling pin.

用擀面杖把面团擀平。

B2 noun /ˈrɒbəɹi/

robbery

抢劫

Meaning

the crime of stealing from someone or somewhere using force or threat

Example

The police are investigating the robbery at the local store.

警方正在调查当地商店的抢劫事件。

B2 verb rɪˈzaɪn

resign

辞职

Meaning

Voluntarily leave a job or other position.

Example

Ministers were forced to resign.

部长们被迫辞职。

B2 verb /ˌriːəˈʃʊr/

reassure

安慰

Meaning

to say or do something to remove someone's doubts or fears

Example

The teacher reassured the students before the exam.

老师在考试前安慰了学生。

B2 noun/verb /rɪˈmɑːrk/

remark

Meaning

something that is said; a comment

Example

She made a remark about the weather.

她对天气做了一个评论。

B2 verb /ˈrɛnəˌveɪt/

renovate

翻新

Meaning

to restore something old to a good state or to improve it

Example

They decided to renovate the old house before moving in.

他们决定在搬进之前修复旧房子。

B2 noun /rɪˈsɛs/

recess

休息

Meaning

A short break from work or school; also a small space set back in a wall.

Example

The children played outside during recess.

孩子们在休息期间在外面玩耍。

B2 noun /rɛlm/

realm

Meaning

A kingdom or domain; a field or area of activity or interest.

Example

He is well known in the realm of science.

B2 adjective /ˈrʌs.ti/

Rusty

生锈的; 不熟练的; 由于缺乏近期练习而受损

Meaning

affected by rust; out of practice; impaired by lack of recent practice

Example

My piano skills are rusty after not playing for years.

我的钢琴技巧生锈了，因为多年没有练习。

B2 noun /ˈraɪdər/

rider

骑手

Meaning

A person who rides a horse, bicycle, motorcycle, or other vehicle.

Example

The rider fell off the horse.

骑手从马背上摔了下来。

B2 adjective /ˈroʊlɪŋ/

rolling

滚动

Meaning

moving in gentle undulations; moving forward by turning over and over

Example

They drove through the rolling hills of the countryside.

他们开车穿过乡村的滚动山丘。

B2 noun ˌreɪ.di.oʊ.ækˈtɪv.ə.ti

radioactivity

放射性

Meaning

The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.

Example

Radioactivity is used in medical treatments like cancer therapy.

放射性在包括癌症治疗在内的医疗治疗中被用于治疗。

B2 verb /rɪˈfreʃ/

refresh

使清新

Meaning

to make fresh again; to restore energy

Example

A cold drink refreshes me on hot days.

冷饮在炎热的日子里让我感到清爽。

B2 verb /ˌriːprəˈdjuːs/

reproduce

再生产, 繁殖

Meaning

To make a copy of something; to generate offspring.

Example

Many animals reproduce rapidly in favorable conditions.

许多动物在有利的条件下快速繁殖。

B2 noun /ˈræŋkɪŋ/

ranking

排名

Meaning

a position in a list or hierarchy, especially in terms of performance or importance

Example

His ranking in the competition improved after each round.

他在比赛中的排名在每一轮之后都有所提高。