reflection
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B1 noun rɪˈflɛkʃən

reflection

反射
Meaning
Serious thought or consideration about something.
Example
The reflection of the past filled his heart with sadness.
过去的反射使他的心充满了悲伤。
C1 adjective /rɪˈpɛlənt/

repellent

驱虫剂
Meaning
Able to drive away something, especially insects or unpleasant things; causing disgust or distaste.
Example
This cream is highly effective as a mosquito repellent.
这款乳霜在防蚊方面非常有效。
B2 noun rɪˈtɛnʃən

retention

保持
Meaning
The continued possession, use, or control of something
Example
The retention of information is essential for academic success.
信息的保持对学术成功至关重要。
C1 verb /ˈreɪdieɪt/

radiate

辐射
Meaning
to emit energy or light; to spread out from a center
Example
The fireplace radiates warmth throughout the room.
壁炉向整个房间辐射热量。
A2 verb /rɪˈlæks/

relax

放松
Meaning
to make or become less tense or anxious; to rest
Example
After a long day, she likes to relax with a good book.
经过一天的劳累，她喜欢拿一本好书放松一下。
C1 adjective /rɪˈper.ə.bəl/

Repairable

可修复的
Meaning
able to be fixed or mended; capable of being repaired
Example
The broken phone is repairable with the right parts.
坏掉的手机可以用正确的部件修复。
A1 noun /ˈrɛst(ə)rɒnt/

restaurant

餐馆
Meaning
a place where meals are prepared and served to customers
Example
We went to the restaurant for dinner.
我们去餐馆吃晚餐。
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。
C2 verb /ˈreə.rɪ.faɪ/

rarefy

稀释, 精炼
Meaning
To make something less dense or more refined.
Example
The air rarefies as you climb higher into the mountains.
随着你爬得更高，空气变得更稀薄。
C1 noun/verb /rɪˈpriːv/

reprieve

Meaning
A temporary relief or delay from something unpleasant; to postpone or cancel punishment.
Example
The prisoner was granted a last-minute reprieve from execution.
B1 noun raɪts

rights

权利
Meaning
A moral or legal entitlement to have or obtain something or to act in a certain way.
Example
The rights of people were prioritized.
人们的权利被优先考虑。
C1 noun/verb /reɪn/

rein

Meaning
A strap used to control a horse; to control or guide something.
Example
The rider pulled the rein to stop the horse.
B2 verb /rɪˈstreɪn/

restrain

抑制
Meaning
to hold back or control; to limit or restrict
Example
Please restrain your dog.
请控制你的狗。
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。
C1 noun /ˈrɛtɪsəns/

reticence

沉默
Meaning
the quality of being reserved or unwilling to speak freely
Example
His reticence made it difficult to know what he was thinking.
他的沉默让人很难知道他在想什么。
C1 adjective /rɪˈpres.ɪv/

Repressive

压制性的
Meaning
restraining freedom or preventing self-expression; oppressive
Example
The repressive government banned all forms of protest.
压制性的政府禁止了所有形式的抗议。
B2 adjective /ˈræʃ.ən.əl/

Rational

理性; 合理; 逻辑
Meaning
based on reason and logic; sensible and practical
Example
She made a rational decision based on the available facts.
她根据可用的事实做出了理性的决定。
B1 adjective /ˌriːəˈlɪstɪk/

realistic

现实的
Meaning
having or showing a sensible and practical idea of what can be achieved or expected
Example
She gave a realistic estimate of the project's cost.
她给出了项目成本的现实估计。
C2 noun /ˈreɪmənt/

raiment

衣服
Meaning
clothing, especially fine or formal wear
Example
The king wore royal raiment during the ceremony.
国王在仪式上穿着皇家衣服。
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。
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。
C2 adjective /rɪˈmiːdiəbl/

remediable

可修复的
Meaning
capable of being corrected or cured
Example
The mistake was serious but still remediable.
这个错误很严重，但仍然是可修复的。
B1 adverb /ˈrel.ə.tɪv.li/

Relatively

相对地
Meaning
in comparison to something else; quite; fairly
Example
The weather is relatively warm today.
今天的天气相对温暖。
B1 adjective /rɔː/

Raw

生的; 未处理的; 自然状态; 没有经验的
Meaning
uncooked; not processed; in natural state; inexperienced
Example
The chef prefers to use raw vegetables in his salads.
厨师喜欢在沙拉中使用生蔬菜。
C2 verb /rɪˈfrækt/

refract

折射
Meaning
To bend light, sound, or heat as it passes through a medium.
Example
The water refracts light, making the straw look bent.
水折射光线，让吸管看起来弯曲。
B2 noun /rɪˈstrɪk.ʃən/

Restriction

限制; 限定; 控制
Meaning
a limiting condition or measure; the limitation or control of someone or something
Example
There are strict restrictions on smoking in public places.
在公共场所吸烟有严格的限制。
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 verb /ˌriːəˈdʒʌst/

readjust

重新调整
Meaning
To change or move something again in order to achieve a better fit, condition, or balance.
Example
He readjusted the chair to make it more comfortable.
他重新调整了椅子，使其更加舒适。
B2 noun /ˈreɪ.zən/

Raisin

葡萄干
Meaning
dried grape
Example
She added raisins to the oatmeal cookies for extra sweetness.
她在燕麦饼干里加了葡萄干以增加甜味。
C1 verb /ˌriːhəˈbɪlɪteɪt/

rehabilitate

Meaning
to restore someone to health, normal life, or a good condition after illness, injury, or imprisonment
Example
The clinic helps rehabilitate injured athletes.
B1 noun /ˌrek.ə.menˈdeɪ.ʃən/

Recommendation

推荐
Meaning
a suggestion that someone or something would be good or suitable for a particular job or purpose
Example
I got this job based on a recommendation from my professor.
我通过教授的推荐得到了这份工作。
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。
B2 verb /rɪˈkleɪm/

reclaim

Meaning
To take back or recover something; to restore to a usable state.
Example
The farmer worked to reclaim the barren land.
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 noun /rɪˈmɛmbrəns/

remembrance

纪念
Meaning
the act of remembering or honoring someone or something
Example
A service was held in remembrance of the fallen soldiers.
为阵亡士兵举行了纪念仪式。
B1 preposition /rɪˈɡɑrdɪŋ/

regarding

关于
Meaning
concerning or relating to
Example
The decision regarding the meeting will be made tomorrow.
关于会议的决定将在明天做出。
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.
C2 adjective /ˈrɛkənˌsaɪləbl̩/

reconcilable

Meaning
Capable of being resolved or made consistent.
Example
Their differences are reconcilable with honest communication.
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 noun /ˈrest.ləs.nəs/

Restlessness

不安
Meaning
the inability to rest or relax as a result of anxiety or boredom
Example
His restlessness during the long meeting was obvious to everyone.
在长时间的会议中，他的不安对每个人都很明显。
B2 noun /red liːf/

Red leaf

红叶
Meaning
red-colored leafy vegetable; amaranth leaves used as greens
Example
Red leaf is rich in iron and is commonly eaten in Bengali households.
红叶富含铁，并且在孟加拉家庭中经常食用。
C1 adjective /rɪˈmoʊtɪd/

remoted

远程的
Meaning
placed at a distance; made remote
Example
The system was remoted to a secure location.
系统已被远程到一个安全的地方。
C1 noun /rɪft/

rift

裂缝
Meaning
a serious break in a relationship; a split or crack
Example
A rift developed between the two friends after the argument.
争执后，两个朋友之间产生了裂缝。
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。
C1 noun /rəʊˈbɒt.ɪk ˈsɜː.dʒər.i/

robotic surgery

机器人手术
Meaning
Surgery performed with the assistance of robotic systems to enhance precision and reduce invasiveness.
Example
Robotic surgery enhances precision in complex procedures.
机器人手术提高了复杂程序的精确度。
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。
B2 noun /ˈroʊstɪd miːt/

Roasted meat

烤肉
Meaning
meat cooked by dry heat in an oven or over fire
Example
The roasted meat was perfectly seasoned and tender.
烤肉被完美地调味和变得嫩滑。
C1 verb /ˌriːˈvaɪ.t̬əl.aɪz/

revitalize

重振
Meaning
To restore energy and effectiveness to something.
Example
The new policies aim to revitalize the economy.
新政策旨在重振经济。
B2 noun /ˈrɛzərvwɑːr/

reservoir

水库
Meaning
A large natural or artificial lake used as a source of water supply.
Example
The city built a new reservoir to ensure enough drinking water for its residents.
这座城市建造了一个新的水库，以确保为居民提供足够的饮用水。
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。
C1 noun /rɪˌmjuː.nəˈreɪ.ʃən/

Remuneration

报酬; 薪酬; 奖金
Meaning
money paid for work or services; compensation or reward
Example
The job offers excellent remuneration and benefits.
这份工作提供了优厚的报酬和福利。
C1 noun /ˈredʒ.ɪ.mən/

regimen

为促进或恢复健康而规定的治疗、生活方式或饮食方案
Meaning
A prescribed course of medical treatment, way of life, or diet for the promotion or restoration of health.
Example
A strict exercise regimen improves overall fitness.
严格的锻炼方案改善了整体健康。
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。
C1 noun /rɪˈdʒɪdəti/

Rigidity

刚性
Meaning
inability to bend or be forced out of shape; unwillingness to change or compromise
Example
The rigidity of the old system prevented any innovation.
旧系统的刚性阻止了任何创新。
C1 verb /rɪˈpjuː.di.eɪt/

repudiate

拒绝
Meaning
to refuse to accept, recognize, or support something
Example
He repudiated the claim that he was involved in the scandal.
他拒绝了他参与丑闻的说法。
C1 adjective /raɪf/

rife

普遍
Meaning
widespread or common, often in a negative sense
Example
Corruption was rife in the old government system.
腐败在旧政府体制中盛行。
B1 noun /rɪˈkwaɪə(r)mənt/

requirement

要求
Meaning
something that is necessary or demanded
Example
The job has specific educational requirements.
这项工作有特定的教育要求。
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.
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 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。
A1 noun /ˈrɪv.ər/

River

河流
Meaning
a large natural stream of water flowing in a channel to the sea, a lake, or another river
Example
The river flows through the valley and into the ocean.
河流穿过山谷并流入大海。
B2 adjective /rɪˈmuːvəbəl/

removable

可拆卸的
Meaning
able to be removed or taken away
Example
This phone has a removable battery.
这款手机有一块可拆卸的电池。
C1 noun/verb /ˈræfəl/

raffle

销售彩票
Meaning
A means of raising money by selling numbered tickets, one or more of which are drawn at random for a prize; to sell something in such a lottery.
Example
The charity decided to raffle a bicycle to raise funds.
慈善机构决定通过抽奖出售自行车来筹集资金。
C2 verb /raɪv/

rive

撕裂
Meaning
to tear apart violently
Example
The earthquake rived the ground in several places.
地震在几个地方撕裂了地面。
C2 noun /rɪˈpæst/

repast

宴席
Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
他们在河边享用了美味的宴席。
C1 noun /rɪˈsaɪtər/

reciter

朗诵者
Meaning
a person who recites or repeats something aloud from memory, especially poetry, prayers, or formal texts
Example
The reciter delivered the poem with clarity and emotion.
朗诵者清晰而富有感情地朗诵了这首诗。
B1 adjective ˈriː.dʒən.əl

regional

区域的
Meaning
Relating to or characteristic of a region.
Example
Regional hubs support localized industries.
区域中心支持本地行业。
C2 noun /ˈrɛvəlri/

revelry

庆典
Meaning
Lively and noisy festivities, especially involving drinking and dancing.
Example
The sound of revelry could be heard throughout the night.
整晚都能听到庆典的声音。
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。
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。
C2 verb /rɛnd/

rend

撕裂
Meaning
to tear something apart violently or forcefully
Example
The explosion rent the air with a deafening noise.
爆炸以震耳欲聋的声音撕裂了空气。
C1 noun /ˈrɪpəl/

Ripple

涟漪
Meaning
a small wave on the surface of water; a spreading effect or influence
Example
The stone created ripples across the calm pond.
石头在平静的池塘中激起了涟漪。
A1 noun /ruːm/

room

房间
Meaning
A space within a building enclosed by walls, floor, and ceiling
Example
She decorated her room with bright colors.
她用明亮的颜色装饰了她的房间。
A2 noun /ˈreɪl.weɪ/

Railway

铁路
Meaning
a track made of steel rails along which trains run; a system of tracks with trains, stations, and other facilities
Example
The railway connects major cities across the country.
铁路连接全国主要城市。
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。
C2 noun /rɪˌkrɪmɪˈneɪʃən/

recrimination

相互指责
Meaning
an accusation made in response to an accusation; mutual blaming
Example
The debate quickly descended into mutual recriminations.
辩论迅速变成了相互指责。
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。
C2 adjective /rɪˈmjuːnərətɪv/

remunerative

有利可图
Meaning
Financially rewarding or profitable.
Example
He chose a remunerative career in medicine.
他选择了医学领域一个有利可图的职业。
C1 verb /reɪv/

rave

赞扬
Meaning
to speak or write about something with great enthusiasm or admiration
Example
Critics rave about the new movie.
评论家们对新电影赞不绝口。
A2 verb /rɪˈpleɪs/

replace

替换
Meaning
to take the place of something or someone; to put something new in place of something old
Example
He decided to replace the broken lamp with a new one.
他决定用一盏新的替代坏掉的灯。
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。
B2 adjective /rɪˈnjuː.ə.bəl/

renewable

可再生
Meaning
Able to be renewed or replaced naturally; not depleted when used.
Example
Renewable resources minimize environmental damage.
可再生资源减少环境损害。
C2 noun /rɪˈdʒɔɪndər/

rejoinder

回应
Meaning
a quick or witty reply; a response to a remark or argument
Example
His sharp rejoinder silenced the crowd.
他犀利的回答让人群安静下来。
C1 adjective /ˈrɪkɪti/

rickety

摇摇欲坠
Meaning
Poorly made and likely to collapse; shaky.
Example
They crossed a rickety wooden bridge over the river.
他们过了一座摇摇欲坠的木桥。
C2 adjective /raɪˈpɛə.ri.ən/

riparian

位于河流或其他水道的岸边或与之相关的
Meaning
Relating to or situated on the banks of a river or other watercourse.
Example
Riparian vegetation helps prevent soil erosion along rivers.
河岸植被有助于防止河流沿岸的土壤侵蚀。
B2 noun /ˈraɪvəlri/

Rivalry

竞争; 对抗
Meaning
competition for the same objective or for superiority in the same field; the state of being rivals
Example
The rivalry between the two teams made the match exciting.
两个队伍之间的竞争使比赛变得非常刺激。
C2 noun /ˈriːbəs/

rebus

谜语
Meaning
a puzzle in which words are represented by pictures, symbols, or letters
Example
The children enjoyed solving the rebus puzzles in the magazine.
孩子们喜欢解答杂志中的谜语。
A2 noun /reɪt/

rate

费率
Meaning
the cost or price of something, or the amount at which something happens
Example
The rate of inflation is increasing every year.
通货膨胀率每年都在上升。
C1 noun /ˈræftər/

rafter

屋梁
Meaning
One of the sloping beams that supports a roof.
Example
The old barn’s rafters were exposed.
老谷仓的屋梁暴露在外。
B1 verb /rɪˈkʌvər/

recover

恢复
Meaning
To return to a normal state of health, mind, or strength; to regain or save something.
Example
The world is struggling to recover from the pandemic.
世界正在努力从大流行中恢复过来。
C1 adjective /rɪˈpjuː.t̬ɪd/

Reputed

有声望的; 出名的
Meaning
generally said or believed to be; having a particular reputation
Example
He is reputed to be one of the best doctors in the country.
他被认为是该国最好的医生之一。
C1 noun /ˈrəʊ.bɒt əˈsɪs.tɪd prəˈsiː.dʒərz/

robot-assisted procedures

机器人辅助程序
Meaning
Medical operations performed with the help of robotic systems to enhance precision and control.
Example
Robot-assisted procedures reduce human error.
机器人辅助程序减少了人为错误。
C1 verb /rɪˈsɜːrdʒ/

resurge

复兴
Meaning
To rise, increase, or become active again after a decline.
Example
Interest in traditional crafts has begun to resurge.
对传统手工艺的兴趣已经开始复兴。
A1 verb /rʌn/

run

跑步
Meaning
to move quickly on foot; to operate or function
Example
I run every morning for exercise.
我每天早上跑步锻炼。
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。
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。
C1 adjective /rɪˈpʌɡ.nənt/

Repugnant

令人反感的; 令人厌恶的; 令人不快的
Meaning
extremely distasteful; unacceptable; causing disgust or strong dislike
Example
The idea of lying to his parents was repugnant to him.
对父母撒谎的想法让他感到反感。
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。
C2 adjective /ˈrɛd.ələnt/

redolent

Meaning
having a strong pleasant smell; strongly reminiscent or suggestive of something
Example
The kitchen was redolent of spices and fresh herbs.
C1 verb /ˌriːəˈfɜːrm/

reaffirm

重申
Meaning
To state again strongly; to confirm or strengthen a statement or belief.
Example
The president reaffirmed his commitment to education reform.
总统重申了他对教育改革的承诺。
C1 adjective /ˈriːɡəl/

regal

皇家
Meaning
Resembling or fit for a king; majestic or royal.
Example
The queen entered the hall with a regal presence.
女王带着皇家气质走进大厅。
C2 adjective /rɪˈsplɛndənt/

resplendent

辉煌
Meaning
Shining brilliantly; dazzling in appearance or effect
Example
The bride looked resplendent in her wedding gown.
新娘穿着婚纱看起来光彩照人。
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。
C2 noun /ˈrɛkluːsəri/

reclusory

隐居地
Meaning
A place for seclusion or retreat, especially for a recluse or hermit.
Example
The monk spent years in the reclusory away from society.
那位和尚在远离社会的隐居地度过了多年。
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。
B1 verb /rɪˈflekt/

reflect

反射
Meaning
to think deeply about; to mirror back light or image
Example
The mirror reflects her beautiful face.
镜子反射出她美丽的脸。
B2 noun /ˌref.jʊˈdʒiː/

Refugee

难民
Meaning
a person who has been forced to leave their country in order to escape war, persecution, or natural disaster
Example
The refugee camp provided temporary shelter for thousands of displaced families.
难民营为成千上万的流离失所的家庭提供了临时庇护。
A1 adverb /ˈriː.ə.li/

Really

实际上; 真的; 非常多
Meaning
actually; truly; very much
Example
I really enjoyed the concert last night.
我真的很享受昨晚的音乐会。
A2 verb /ˈrɛkəɡnaɪz/

recognize

Meaning
To identify someone or something seen before; to acknowledge or accept.
Example
She did not recognize him in the crowd.
C1 noun /rɪˈpɔːrtɪʒ/

reportage

报道
Meaning
the act of reporting news or describing events in the media
Example
The magazine is known for its detailed reportage of political issues.
这本杂志以其对政治问题的详细报道而闻名。
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 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 verb /roʊm/

roam

漫游
Meaning
to walk or travel without a specific destination; to wander
Example
Wild animals roam freely in the forest.
野生动物在森林中自由漫游。
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。
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。
B1 verb /rɪˈviːl/

reveal

揭示
Meaning
to make known or show something that was hidden
Example
The investigation revealed the truth.
调查揭示了真相。
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 verb /ˈrɪvɪt/

rivet

用铆钉固定 / 吸引注意
Meaning
to fasten or secure with a rivet; to hold someone’s attention firmly
Example
The craftsman riveted the metal plates together.
工匠用铆钉把金属板固定在一起。
C1 noun /rɪˈpjuːt/

repute

名誉
Meaning
the opinion generally held of someone or something; reputation
Example
He is a scholar of great repute in his field.
他在他的领域享有很高的名誉。
C1 noun /rʌk/

Ruck

推搡; 混乱的人群
Meaning
a situation where a crowd of people are pushing against each other; a disorderly crowd
Example
There was a ruck at the football match.
足球比赛中发生了推搡。
C1 noun /ˈruːbrɪk/

rubric

评分标准 / 指南
Meaning
A set of instructions, rules, or a heading in a document, often used for grading criteria.
Example
The teacher provided a grading rubric for the assignment.
老师提供了一个作业评分标准。