ruler
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A2 noun /ˈruːlər/

ruler

统治者; 尺子
Meaning
A person who governs or controls a country; a straight-edged tool used for measuring or drawing lines
Example
The ruler drew a straight line on the paper while the king was a powerful ruler of his kingdom.
鲁勒在纸上画了一条直线，而国王是他王国的强大统治者。
C2 noun /rɪˈfrɪndʒənsi/

refringency

折射率
Meaning
The ability of a substance to bend light; refractive power.
Example
Glass has a higher refringency than water.
玻璃的折射率高于水。
B1 noun /rɪˈɡret/

Regret

遗憾
Meaning
a feeling of sadness or disappointment about something that has happened or been done
Example
She felt deep regret about her harsh words.
她对她的尖锐话语深感遗憾。
C2 noun /ˌræʃioʊsɪˈneɪʃən/

ratiocination

推理
Meaning
the process of reasoning or logical thinking
Example
His ratiocination impressed the judges during the debate.
他的推理在辩论中给裁判留下了深刻印象。
C2 adjective /ˈrɪbɔːld/

ribald

猥亵笑话
Meaning
Referring to sexual matters in a humorous or vulgar way.
Example
The comedian’s ribald jokes made the audience laugh uncomfortably.
喜剧演员的猥亵笑话让观众不自在地笑了。
B1 noun /ˈrʌbɪʃ/

Rubbish

垃圾; 无用的东西; 胡说
Meaning
waste material; refuse or litter; nonsense or worthless things
Example
Please throw the rubbish in the bin.
请把垃圾丢进垃圾桶。
C1 noun /ˌrɛfəˈrɛndəm/

referendum

公投
Meaning
a general vote by the population on a single political issue
Example
The government held a referendum on the new constitution.
政府就新宪法举行了公投。
B2 noun, verb /rɪər/

rear

后面 / 抚养
Meaning
the back part of something; to bring up or raise children or animals
Example
The mother cat reared her kittens in a quiet corner.
母猫在安静的角落里抚养她的猫仔。
B2 verb rɪˈstɔːr

restore

恢复
Meaning
To bring back to a former or original state; to reinstate.
Example
Restoring the tradition of student politics is necessary.
恢复学生政治传统是必要的。
C2 noun /ˈrʊkəri/

rookery

鸟类栖息地
Meaning
a place where rooks or other birds breed and nest in colonies
Example
We saw a rookery full of noisy birds near the forest.
我们看到一个充满吵闹鸟类的鸟类栖息地，靠近森林。
A2 verb /ˈriːəlaɪz/

realize

意识到
Meaning
to become aware of; to understand clearly; to achieve or make real
Example
I didn't realize how late it was until I checked the clock.
我没意识到已经这么晚了，直到我看了钟。
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。
B1 noun /ruːt/

Root

根; 来源; 根源; 原因
Meaning
the part of a plant that grows underground; the basic cause, source, or origin of something
Example
We need to find the root of this problem to solve it permanently.
我们需要找到这个问题的根源，才能永久解决它。
C2 verb /rɪˈkænt/

recant

撤回
Meaning
to withdraw or renounce a statement or belief formally
Example
He recanted his previous statement in court.
他在法庭上撤回了之前的陈述。
A2 verb /rɪˈpiːt/

repeat

重复
Meaning
to say or do something again
Example
Could you please repeat what you just said?
你能重复一下你刚才说的吗？
C1 adjective /ˈrʌs.tɪk/

Rustic

简单而不复杂；与乡村地区相关
Meaning
simple and unsophisticated; relating to rural areas
Example
The rustic cottage had wooden beams and a thatched roof.
那座乡村小屋有木梁和茅草屋顶。
C2 noun /rɪˈkɒɡnɪzəns/

recognizance

法律义务
Meaning
A legal obligation or bond entered into before a court, especially to ensure future appearance.
Example
He was released on his own recognizance.
他在自己的法律义务下被释放。
A2 verb /raɪz/

rise

上升
Meaning
to move upward; to get up from bed; to increase
Example
The sun rises in the east.
太阳从东方升起。
B1 noun /ˈreɪlˌroʊd/

railroad

铁路
Meaning
a track or system of tracks made of steel rails along which trains run
Example
The railroad connects the city to several nearby towns.
铁路将城市与附近的几个小镇连接起来。
C1 adjective /ˌruː.dɪˈmen.tər.i/

Rudimentary

基本的; 初级的; 不完全发展的; 发展初期阶段的
Meaning
basic; elementary; undeveloped; in the earliest stage of development
Example
She has only rudimentary knowledge of French.
她对法语的了解只是初步的。
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。
C1 verb /rɪˈsiːd/

recede

退去
Meaning
To move back or further away from a previous position.
Example
The floodwaters began to recede after the heavy rain stopped.
暴雨停止后，洪水开始退去。
B1 adverb /ˈrʌfli/

Roughly

大约; 以粗暴或暴力的方式
Meaning
approximately; in a harsh or violent way
Example
The project will take roughly three months to complete.
这个项目大约需要三个月完成。
C1 verb /rɪˈtreɪs/

retrace

Meaning
to go back over a path or route; to recall and repeat steps taken earlier
Example
She retraced her steps to find her lost keys.
B1 noun /ˈrɪðəm/

rhythm

节奏
Meaning
a strong, regular, repeated pattern of movement or sound
Example
The rhythm of the music made everyone want to dance.
音乐的节奏让每个人都想跳舞。
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。
B1 noun /rɪˈwɔːd/

reward

奖励
Meaning
something given in recognition of service, effort, or achievement
Example
He received a reward for returning the lost wallet.
他因归还丢失的钱包而获得奖励。
B1 verb /rɪˈtaɪə/

retire

退休
Meaning
to stop working after reaching a certain age or having completed a career
Example
She decided to retire after working for 40 years.
她决定在工作了40年后退休。
C1 noun /rɪˈkluːs/

recluse

隐士
Meaning
A person who lives alone and avoids other people; someone who lives a solitary life.
Example
The old man lived as a recluse in the mountains.
那位老人住在山中，过着隐士般的生活。
C1 noun /ˈræʃən/

ration

配给
Meaning
a fixed amount of something, especially food, officially allowed to each person
Example
During the war, each family received a weekly ration of rice.
在战争期间，每个家庭每周获得固定的米饭配给。
B1 noun /ruːˈtiːn/

routine

日常工作, 习惯, 固定顺序
Meaning
A sequence of actions regularly followed; a fixed program.
Example
A well-structured routine improves productivity.
一个良好的结构化的日常生活提高了生产力。
B2 verb /rɪˈfaɪn/

refine

改进
Meaning
to improve by making small changes; to purify
Example
The chef refines the recipe to perfection.
厨师将食谱完善到完美。
A2 noun /ˈriː.zənz/

reasons

原因
Meaning
Causes, explanations, or justifications for an action or event.
Example
Reasons for pollution need addressing urgently.
污染的原因需要紧急处理。
B1 noun /rɪˈspɒns/

Response

回应; 反应
Meaning
a reaction to something; an answer or reply; the way in which something reacts to external stimulus
Example
The government's response to the crisis was swift and decisive.
政府对危机的回应迅速而果断。
C1 verb /rɪˈnɛɡ/

renege

违约
Meaning
to go back on a promise, agreement, or commitment
Example
The company reneged on its promise to increase wages.
公司违背了他们提高工资的承诺。
C1 noun /roʊz ˈber.i/

Rose berry

玫瑰莓
Meaning
a type of berry with rose-like characteristics or flavor
Example
The rose berry has a delicate floral taste that reminds me of roses.
玫瑰莓具有细腻的花香口感，让我想起玫瑰花。
C1 noun /ˈrɛ.trəʊ.fɪt.ɪŋ/

retrofitting

为旧系统添加新技术或功能
Meaning
The addition of new technology or features to older systems.
Example
The building underwent retrofitting to meet new safety standards.
这座建筑通过加装 retrofit 来满足新的安全标准。
C1 verb /ˌrɛzəˈrɛkt/

resurrect

复活
Meaning
To bring back to life or revive something from the past.
Example
The director decided to resurrect the old play for a new audience.
导演决定让旧剧本为新的观众复活。
A2 noun /ˈriːdər/

reader

读者
Meaning
a person who reads or who is capable of reading
Example
She is a fast reader, finishing books in a day.
她是一个快速的读者，一天就能读完书。
B2 verb /rɪˈvɜːrt/

revert

恢复
Meaning
to return to a previous state, condition, or practice
Example
The system will revert to its original settings after the update.
系统将在更新后恢复到原始设置。
B2 adjective /rɪˈfreʃ.ɪŋ/

Refreshing

清新
Meaning
making one feel energized and renewed; pleasantly new or different
Example
The cool breeze was refreshing after the hot day.
在炎热的日子之后，凉爽的微风让人感觉清新。
C1 noun /ˈrɛɡjəleɪtər/

regulator

调节器
Meaning
a person or device that controls or maintains the operation of a system
Example
The government appointed a new regulator for the financial sector.
政府为金融部门任命了新的调节器。
C1 noun /rɪdʒ/

ridge

山脊或山顶
Meaning
a long, narrow hilltop, mountain range, or raised strip
Example
We walked along the mountain ridge.
我们沿着山脊走。
C1 noun /rɪˈzʌmp.ʃən/

Resumption

恢复
Meaning
the action of beginning something again after a pause or interruption
Example
The resumption of classes will be announced next week.
下周将宣布课程的恢复。
C1 verb /rɪˈbʌt/

rebut

反驳
Meaning
to argue against or prove wrong; to refute
Example
The lawyer rebutted the false accusations with strong evidence.
律师用有力的证据反驳了虚假的指控。
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 verb /ˌriː.kənˈsɪd.ər/

reconsider

重新考虑
Meaning
to think about something again, especially to change a decision or opinion
Example
She decided to reconsider her decision about moving abroad.
她决定重新考虑她关于移居国外的决定。
C2 adjective /ˈruːnɪk/

runic

与符文相关
Meaning
relating to or consisting of runes; mysterious or magical
Example
The old stone had strange runic carvings on it.
这块古老的石头上有奇怪的符文雕刻。
C1 verb /rɪˈzaʊnd/

resound

回响
Meaning
To fill a place with sound; to be celebrated or talked about widely.
Example
The hall resounded with applause.
大厅里回荡着掌声。
A1 noun /reɪn/

Rain

雨
Meaning
water that falls from clouds in small drops
Example
The heavy rain forced us to stay indoors.
大雨迫使我们待在室内。
C2 verb /rɪˈdaʊnd/

redound

贡献
Meaning
to contribute greatly to a result or consequence, usually beneficial
Example
His hard work will redound to the success of the company.
他的努力工作将对公司成功作出贡献。
C1 noun ˈremnənts

remnants

残余
Meaning
A small remaining quantity of something; a surviving trace.
Example
The remnants of the wall are still visible.
墙的残余部分仍然可见。
B1 verb /ˌrɛprɪˈzɛnt/

represent

代表
Meaning
to act or speak on behalf of someone or something
Example
He will represent our company at the conference.
他将在会议中代表我们的公司。
C1 noun /ˈrɒndɪvuː/

rendezvous

约会
Meaning
a meeting or appointment at an agreed time and place
Example
They arranged a secret rendezvous at the café.
他们在咖啡馆安排了一次秘密的会面。
C1 noun /ˈroʊdənt/

rodent

啮齿动物
Meaning
a small mammal such as a mouse, rat, or squirrel, characterized by constantly growing incisors
Example
The farmer set traps to catch the rodents in his barn.
农民设置了陷阱，以捕捉谷仓中的啮齿动物。
C1 noun /ˌrɛkwɪˈzɪʃən/

requisition

要求
Meaning
An official order laying claim to the use of property or materials; a formal demand or request.
Example
The manager submitted a requisition for new office supplies.
经理提交了新的办公室用品的要求。
C1 verb /ˈrɛzəneɪt/

resonate

共鸣
Meaning
To produce or be filled with a deep, full, and reverberating sound; to evoke a feeling or memory.
Example
Her words resonated with the audience.
她的话在听众中产生了共鸣。
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。
C1 noun /ˌrɛpəˈreɪʃən/

reparation

赔偿
Meaning
the making of amends for a wrong done by paying money or helping those who were wronged
Example
The government offered reparations to the victims of the conflict.
政府向冲突受害者提供了赔偿。
C2 adjective /rəˈpeɪ.ʃəs/

rapacious

贪婪
Meaning
having an extreme desire to take things for oneself, greedy
Example
The rapacious landlord raised the rent without reason.
贪婪的房东无缘无故地提高了租金。
A2 verb /roʊl/

roll

滚动
Meaning
to move by turning over and over on an axis
Example
She rolled the ball down the hill.
她把球滚下了山坡。
C1 verb /ˌriːɪmˈbɜːrs/

reimburse

报销
Meaning
to pay back money to someone who has spent it or lost it
Example
The company reimbursed him for travel expenses.
公司为他报销了旅行费用。
C1 adjective ˈriːdʒən spəˈsɪfɪk

region-specific

区域特定
Meaning
Relating to or characteristic of a particular region or area.
Example
Climate change impacts are region-specific.
气候变化的影响是区域特定的。
C1 verb /ˌriːˈkæl.ɪ.breɪt/

recalibrate

重新校准, 重新调整
Meaning
To calibrate again or differently; to adjust or correct something based on new information or changed circumstances.
Example
The company had to recalibrate its strategies to adapt to the market.
公司必须重新校准其策略以适应市场。
B1 noun rɪˌspɒnsəˈbɪlɪti

responsibility

责任
Meaning
The state or fact of having a duty to deal with something or of having control over someone.
Example
Taking responsibility for one's actions is a sign of maturity.
承担自己的责任是成熟的标志。
C2 noun /ˈrɛv.ər.i/

reverie

白日梦; 心神不定
Meaning
A state of being pleasantly lost in one's thoughts; a daydream.
Example
Lost in reverie, he didn't hear his name being called.
沉浸在白日梦中，他没有听到有人叫他的名字。
C2 noun /ˈrɛk.tɪ.tjuːd/

rectitude

正直
Meaning
Morally correct behavior or thinking; righteousness and integrity.
Example
His rectitude earned him respect in society.
他的正直让他在社会中赢得了尊重。
B2 adjective /ˈrek.ləs/

Reckless

鲁莽的; 冒失的; 危险的;
Meaning
acting without thinking about consequences; careless; dangerous;
Example
His reckless driving caused a serious accident.
他的鲁莽驾驶导致了严重的事故。
C1 adjective /ˈruːfəl/

rueful

遗憾的
Meaning
Expressing sorrow, regret, or pity.
Example
He gave a rueful smile after losing the match.
他在输掉比赛后露出了遗憾的笑容。
C1 adjective /ˈrɛtroʊˌɡreɪd/

retrograde

逆行的
Meaning
moving backward or returning to a worse condition
Example
The policy was seen as a retrograde step for human rights.
该政策被视为人权的倒退步骤。
C1 noun, verb /raʊt/

rout

失败
Meaning
A decisive defeat; to defeat completely.
Example
The army routed the enemy forces in the battle.
军队在战斗中彻底击败了敌军。
B2 noun /ˈrɒbər/

robber

强盗
Meaning
a person who steals property from others, often using force or threat
Example
The robber was caught after a quick police chase.
经过警方的快速追捕，强盗被抓住了。
C1 noun /ˌrɛs.ɪˈprɒs.ɪ.ti/

reciprocity

为了共同利益与他人交换物品的做法
Meaning
The practice of exchanging things with others for mutual benefit.
Example
Business relationships thrive on reciprocity.
商业关系依赖于互惠。
C1 adjective /rɪˈmiːdiəl/

Remedial

补救的; 修正的; 治疗的;
Meaning
intended as a remedy; corrective; providing a cure;
Example
The students need remedial classes to improve their math skills.
学生们需要补习课来提高他们的数学技能。
B2 adverb /rɪˈlʌk.tənt.li/

Reluctantly

不情愿地
Meaning
in an unwilling manner; with hesitation or resistance
Example
She reluctantly agreed to help with the project.
她不情愿地同意帮助这个项目。
C2 noun /rɪˈpʌɡ.nəns/

repugnance

厌恶
Meaning
intense disgust or strong aversion towards something
Example
She felt deep repugnance at the cruelty of the act.
她对这个行为的残忍感到深深的厌恶。
B1 adjective /rɪˈleɪ.tɪd/

Related

相关的; 有联系的
Meaning
connected; associated; having a connection or relationship
Example
These two problems are closely related to each other.
这两个问题彼此紧密相关。
C1 verb /riːˈpeɪ.tri.eɪt/

repatriate

遣返
Meaning
To return someone to their own country, often after war or imprisonment.
Example
The government worked to repatriate the refugees safely.
政府努力确保安全地将难民遣返回国。
B1 noun /ˌrep.rɪˈzen.tə.tɪv/

representative

代表
Meaning
A person chosen or appointed to act or speak for another or others.
Example
The representative addressed critical issues.
代表解决了关键问题。
C1 verb /ˌriːˈtʌtʃ/

retouch

修饰
Meaning
To improve or repair a picture, photograph, or image by making small changes.
Example
The photographer retouched the image to remove blemishes.
摄影师对图片进行了修饰以去除瑕疵。
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。
C1 adjective /ˈraʊ.di/

Rowdy

吵闹的; 无序的; 破坏性的
Meaning
disorderly; unruly; noisy and disruptive
Example
The rowdy children were making too much noise.
吵闹的孩子们制造了太多噪音。
C1 noun /rɪˈdʒɔɪsɪŋ/

rejoicing

欢庆
Meaning
The action of showing great joy or happiness
Example
There was much rejoicing after the victory.
胜利之后有很多欢庆。
C1 adjective /rɪˈpen.tənt/

Repentant

悔过的; 懊悔的; 后悔的
Meaning
feeling or expressing sincere regret and remorse; sorry for one's actions
Example
The repentant thief returned the stolen money.
悔过的窃贼归还了被盗的钱。
C2 verb /ˌriːkruːˈdɛs/

recrudesce

复发
Meaning
to break out or appear again after a period of dormancy or decline
Example
After months of calm, violence recrudesced in the region.
经过几个月的平静后，暴力在该地区再次爆发。
B2 noun ˌrev.əˈluː.ʃənz

revolutions

革命
Meaning
Dramatic and wide-reaching changes in political, social, or economic systems, often involving the overthrow of a government or social order.
Example
Revolutions often lead to significant societal changes.
革命常常导致社会变革的重要变化。
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。
C2 noun /ræŋˈɡuːn ˈkriːpər/

Rangoon creeper

缅甸爬山虎
Meaning
A climbing vine with fragrant flowers that change color from white to pink to red
Example
The Rangoon creeper covered the entire fence with its sweet-smelling flowers.
缅甸爬山虎用它甜美的花朵覆盖了整个篱笆。
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。
B1 adjective, noun /ˈroʊmən/

roman

罗马的 / 古罗马公民
Meaning
relating to Rome or its people; a citizen of ancient Rome
Example
The Roman Empire influenced much of modern civilization.
罗马帝国影响了现代文明的许多方面。
B2 noun /ˈraɪvəl/

Rival

竞争对手; 对手;
Meaning
a person or thing competing with another for the same objective or for superiority in the same field
Example
The two companies have been business rivals for decades.
这两家公司已经是商业竞争对手几十年了。
C2 noun /rɪˈkwaɪtəl/

requital

报应
Meaning
The act of returning something, such as a favor, service, or punishment; repayment or retaliation.
Example
She offered her time in requital for his kindness.
她为他的善良报以自己的时间。
C1 noun /ruːz/

Ruse

诡计; 计谋
Meaning
an action intended to deceive someone; a trick or stratagem
Example
The thief used a clever ruse to distract the guard.
小偷使用了一种巧妙的诡计来分散警卫的注意力。
A2 verb /riːˈsaɪ.kəl/

recycle

回收
Meaning
to process used materials so they can be used again instead of being thrown away
Example
We should recycle paper and plastic to reduce waste.
我们应该回收纸张和塑料，以减少废物。
C1 verb rɪˈlɪŋ.kwɪʃ

relinquish

放弃
Meaning
To give up any authority, responsibility, or property.
Example
He decided to relinquish his position as CEO.
他决定放弃CEO职位。
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 adjective /rɪˈzɪstənt/

resistant

抗性
Meaning
not affected by something; able to oppose or withstand
Example
This fabric is resistant to water and stains.
这块布料对水和污渍具有抗性。
C1 noun /rɪˈkɒnɪsəns/

reconnaissance

侦察
Meaning
A survey or exploration, especially for military or strategic purposes.
Example
The soldiers conducted a reconnaissance of the enemy camp.
士兵们进行了敌营的侦察。
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。
C2 noun/verb /ˈrɛkəmˌpɛns/

recompense

赔偿
Meaning
to compensate someone for loss or harm suffered; compensation given for damage or injury
Example
The company offered financial recompense to the injured worker.
公司向受伤的工人提供了经济赔偿。
C1 noun ˌriː.pɚˈkʌʃ.ənz

repercussions

后果
Meaning
The unintended consequences or effects of an action or event.
Example
The new policy had unintended repercussions on the economy.
新的政策对经济产生了意外的影响。
C1 noun rɪˈdʌndənsi

redundancy

冗余，过剩
Meaning
The state of being not or no longer needed or useful; superfluousness.
Example
The redundancy in the company's workforce led to many layoffs.
公司员工中的冗余导致了大量裁员。
B1 noun ˌrekəɡˈnɪʃn

recognition

认可
Meaning
Acknowledgment of the existence, validity, or legality of something; appreciation or acclaim for an achievement, service, or ability.
Example
He earned recognition after years of struggle.
他在多年奋斗后获得了认可。
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。
C1 noun /ˈriːpər/

reaper

割草和收获作物的人或机器
Meaning
a person or machine that cuts and gathers crops
Example
The reaper moved slowly through the golden fields.
瑞珀缓缓地穿过金色的田野。
C1 verb /rɪˈdʒuː.vɪ.neɪt/

rejuvenate

恢复活力
Meaning
To make or feel young, healthy, or energetic again.
Example
A vacation can rejuvenate the mind and body.
度假可以使身心焕发活力。
B2 noun /rɪˈsiː.vər/

Receiver

接收器
Meaning
a person or thing that receives something; the part of a telephone containing the earpiece and mouthpiece
Example
She picked up the receiver to answer the phone call.
她拿起听筒接听电话。
C2 noun /rɪˈfrækʃən/

refraction

折射
Meaning
The bending of light, sound, or other waves when they pass from one medium to another of different density.
Example
The refraction of light in water makes objects appear bent.
水中的光折射使物体看起来弯曲。
C2 noun /ˈræpsədi/

rhapsody

激昂的歌曲/赞美
Meaning
an expression of great enthusiasm or an epic musical composition
Example
The singer’s performance was a rhapsody of emotions.
歌手的表演是一场情感的狂想曲。
C1 noun /ræˈpɔːr/

rapport

关系
Meaning
A close and harmonious relationship in which the people or groups concerned understand each other's feelings or ideas.
Example
The teacher built a strong rapport with her students.
老师与学生建立了良好的关系。
B2 noun /ˈrɪdəl/

Riddle

谜语
Meaning
a question or statement intentionally phrased so as to require ingenuity in ascertaining its answer or meaning; a puzzle
Example
The ancient riddle stumped all the scholars for years.
古老的谜语让所有学者困扰了多年。
C2 verb /rɪˈmɒnstreɪt/

remonstrate

抗议
Meaning
To make a forceful protest or objection.
Example
Citizens remonstrated against the new tax policy.
公民们抗议新税政策。
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 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 /ˌrɛvəˈleɪʃən/

revelation

启示
Meaning
A surprising and previously unknown fact, especially one made known in a dramatic way.
Example
The book was full of shocking revelations about the politician.
这本书充满了对政治家的震惊启示。
B1 noun /rɪˈsɔːrs/

resource

资源
Meaning
A supply of materials, money, or assets that can be used when needed.
Example
Water is a vital natural resource.
水是宝贵的自然资源。
C1 adjective rɪˈsɛʃ.ən.er.i

recessionary

衰退的
Meaning
Relating to or characterized by economic recession.
Example
Governments introduce policies to counter recessionary effects.
政府推出政策来应对衰退效应。
C1 verb /ˈrʌm.ɪdʒ/

rummage

杂乱地翻找
Meaning
to search through something in a disorderly way
Example
He rummaged through the drawer for his keys.
他在抽屉里翻找钥匙。
C1 noun ˌrev.əˈluː.ʃən.ər.i ɪˈnɪʃ.ə.tɪv

revolutionary initiative

革命性倡议
Meaning
A groundbreaking action or plan that brings about significant change or transformation.
Example
The revolutionary initiative promotes sustainable energy.
革命性倡议促进可持续能源。
C1 noun /ˈrɛtrəsˌpɛkt/

retrospect

回顾
Meaning
the act of looking back on or reviewing past events
Example
In retrospect, the decision seemed unwise.
回顾来看，那个决定似乎不明智。
B1 verb /rɪˈliːs/

release

释放
Meaning
to set free; to allow something to escape or go away
Example
The prisoner was released after ten years.
囚犯在十年后被释放。