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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 noun /ˈrem.ə.di/

Remedy

药物；治疗；补救办法
Meaning
a medicine or treatment for a disease; a solution to a problem
Example
This herbal remedy helps with headaches.
这种草药治疗有助于缓解头痛。
B2 adverb /ruːˈtiːnli/

routinely

定期地
Meaning
as part of a regular procedure; habitually
Example
The staff routinely checks the equipment for safety.
工作人员定期检查设备的安全性。
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 verb /rɪˈzɜːv/

reserve

预定
Meaning
to keep something for future use; to book in advance
Example
I want to reserve a table for dinner.
我想为晚餐预订一张桌子。
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 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。
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 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 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 verb /ˈrɛkən/

reckon

推测
Meaning
To think, believe, or expect something; to calculate or estimate.
Example
I reckon it will rain later today.
我猜今天稍后会下雨。
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 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 /reɪd/

raid

突袭
Meaning
to attack suddenly; to search and seize
Example
Police raid the illegal gambling house.
警方突袭非法赌博屋。
B2 adjective /rɪˈstrɪk.tɪd/

Restricted

有限制的或控制的；受限制的
Meaning
limited or controlled; subject to restrictions
Example
Access to this area is restricted to authorized personnel only.
进入此区域仅限授权人员。
B2 noun rɪˈzentmənt

resentment

怨恨
Meaning
Bitter indignation at having been treated unfairly.
Example
Resentment grew among the students.
学生们之间的怨恨加剧了。
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 noun ˈruθləs ˌkɑmpəˈtɪʃən

ruthless competition

无情的竞争
Meaning
Fierce and merciless rivalry or contest, without pity or compassion.
Example
Ruthless competition for power leads to societal issues.
为了权力的无情竞争导致了社会问题。
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 /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 adjective /ˈræp.ɪd/

Rapid

快速的；迅速的；急速的；
Meaning
happening in a short time or at a fast pace
Example
The rapid growth of technology has changed our daily lives.
技术的快速增长改变了我们的日常生活。
B2 noun /ˈraɪfəl/

Rifle

步枪
Meaning
a gun with a long barrel that is fired from the shoulder
Example
The soldier carried a rifle during the mission.
士兵在任务中携带着步枪。
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 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。
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 noun/verb /rɪˈmɑːrk/

remark

评论
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 noun /ræɡ/

Rag

旧布；用来清洁的破旧衣物
Meaning
a piece of old cloth used for cleaning; worn-out clothing
Example
She used an old rag to clean the dusty table.
她用一块旧布擦拭了满是灰尘的桌子。
B2 verb /ˌriː.ɪnˈfɔːrs/

reinforce

加固
Meaning
To strengthen or support something with additional material, people, or effort.
Example
The teacher used examples to reinforce the lesson.
老师使用示例来加固这节课。
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 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。
B2 noun ˌrɛstəˈreɪʃən

restoration

修复
Meaning
The process of returning something to its former condition.
Example
The restoration of the forest began after decades of neglect.
森林的修复开始于数十年的忽视之后。
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 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。
B2 adjective /ˈrest.ləs/

Restless

焦虑不安
Meaning
unable to rest or relax; constantly moving or fidgeting
Example
The child was restless during the long car journey.
孩子在长时间的车程中坐立不安。
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 verb /rɪˈvɜːs/

reverse

反转
Meaning
to change something to the opposite direction, position, or result
Example
She quickly reversed the car out of the driveway.
她迅速把车从车道上倒了出来。
B2 adverb /rɪˈɡɑrdləs/

regardless

不管
Meaning
without paying attention to the current situation or condition
Example
She will go to the party regardless of the weather.
她将去派对，不管天气如何。
B2 noun /ˈrækɪt/

racket

球拍 / 喧闹
Meaning
A piece of equipment used to hit the ball in sports like tennis or badminton; also a loud noise or an illegal scheme.
Example
He bought a new tennis racket for the match.
他为比赛买了一把新网球拍。
B2 adverb /ˈred.ɪ.li/

Readily

乐意地; 容易地; 毫不犹豫
Meaning
willingly; easily; without hesitation
Example
She readily agreed to help with the project.
她乐意地同意帮助项目。
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 noun, verb /ˈrætəl/

rattle

嘎啦作响；拨浪鼓
Meaning
to make a rapid series of short, sharp sounds; a device or object that makes such a sound
Example
The loose window began to rattle in the strong wind.
在强风中，松动的窗户嘎啦作响。
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 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 /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 verb /reɪl/

rail

抗议
Meaning
to complain or protest strongly about something
Example
He railed against the unfair decision.
他抗议不公平的决定。
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 /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 noun /ˌreɡ.jʊˈleɪ.ʃənz/

regulations

规定
Meaning
Rules or directives made and maintained by an authority.
Example
Strict regulations ensure fair practices.
严格的规定确保公平的做法。
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 verb /rɪˈkɜːr/

recur

Meaning
to happen again, especially repeatedly or at regular intervals
Example
The headache tends to recur every few weeks.
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 /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 /ˈrɛlɪvənsi/

relevancy

相关性
Meaning
the quality of being closely connected or appropriate
Example
The professor questioned the relevancy of the example to the topic.
教授质疑了这个例子与主题的相关性。
B2 verb /rɪp/

rip

撕裂
Meaning
to tear something quickly or violently
Example
He accidentally ripped his shirt on the fence.
他不小心在篱笆上撕破了衬衫。
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 noun rɪˈpʌb.lɪk

republic

共和国
Meaning
A state in which supreme power is held by the people and their elected representatives, with an elected or nominated president rather than a monarch.
Example
A republic is governed by representatives of the people.
共和国由人民的代表治理。
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 noun /ˈrɛnəˌsɑːns/

renaissance

文艺复兴
Meaning
a revival of art, culture, or learning; a period of renewed interest and growth
Example
The city experienced a cultural renaissance during the 1990s.
这座城市在1990年代经历了文化复兴。
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 adjective /ˈrɒt.ən/

Rotten

腐烂的; 坏的
Meaning
decayed; spoiled; bad
Example
The apple is rotten and should be thrown away.
苹果已经腐烂了，应该扔掉。
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 /ˌrep.ɪˈtɪʃ.ən/

Repetition

重复
Meaning
the action of repeating something that has already been said or written
Example
Constant repetition helps students memorize vocabulary effectively.
持续的重复帮助学生有效地记忆词汇。
B2 verb /rɪˈvaɪv/

revive

复苏
Meaning
To bring back to life, consciousness, or activity.
Example
The paramedics managed to revive the unconscious man.
急救员成功让昏迷的男子复苏。
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 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 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 verb /rɪˈdʒɔɪs/

rejoice

欢欣
Meaning
to feel or show great joy; to celebrate
Example
The family rejoices at the good news.
这个家庭因好消息而欢欣鼓舞。
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 noun /ˈrɔɪəlti/

royalty

皇室成员 / 特许权使用费 (作者收入)
Meaning
Members of a royal family or payment made to the owner of a patent, copyright, or natural resource.
Example
The author receives a royalty for every book sold.
作者从每本卖出的书中获得特许权使用费。
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 adverb /rɪˈpɔːtɪdli/

reportedly

据报道
Meaning
according to what is said or believed, although not confirmed
Example
The company has reportedly agreed to the new terms.
公司 reportedly 已同意新的条款。
B2 noun /ˈriːteɪlər/

retailer

零售商
Meaning
a person or business that sells goods to consumers rather than to other businesses
Example
The retailer offers discounts on electronic products.
零售商提供电子产品的折扣。
B2 noun /roʊst/

Roast

烤肉
Meaning
Meat cooked by dry heat in an oven or over an open fire
Example
The Sunday roast was perfectly cooked and very tender.
周日的烤肉被煮得非常完美，肉质非常嫩。
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 /ˈreɪn.dʒər/

ranger

巡护员
Meaning
A person responsible for protecting and managing forests, parks, or natural areas.
Example
The park ranger guided the tourists through the forest trail.
公园巡护员带领游客走过森林小道。
B2 verb /riːp/

reap

收获
Meaning
to cut or gather a crop; to receive as a consequence of actions
Example
Farmers reap wheat in the late summer.
农民在夏末收割小麦。
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。
B2 adjective /rɪˈflektɪv/

Reflective

反射的; 沉思的; 能反射光或图像
Meaning
thoughtful; contemplative; able to reflect light or images
Example
After the meeting, he was in a reflective mood.
会议后，他处于沉思的状态。
B2 adjective /rɪˈspek.tə.bəl/

Respectable

体面
Meaning
worthy of respect; having good reputation; decent
Example
He comes from a respectable family in the community.
他来自社区一个体面的家庭。
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 /raɪˈnɒs.ər.əs/

Rhinoceros

犀牛
Meaning
a large, heavy animal with thick skin and one or two horns on its nose
Example
The rhinoceros charged through the grassland.
犀牛冲过草原。
B2 noun /rɪˌlaɪəˈbɪləti/

reliability

可靠性
Meaning
the quality of being trustworthy or performing consistently well
Example
Customers value the reliability of our service.
客户重视我们服务的可靠性。
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 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 /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 adverb /ˈræp.ɪd.li/

Rapidly

快速地; 迅速
Meaning
at a fast speed; quickly
Example
The company is rapidly expanding into new markets.
公司正在迅速拓展新市场。
B2 verb /rɪˈkɔːl/

recall

回忆
Meaning
to bring (a memory, fact, or situation) back into one's mind
Example
I can't recall the last time we met.
我记不得我们上次见面是什么时候。
B2 noun /'ræd.ɪʃ/

Radish

小萝卜
Meaning
a small pungent edible root vegetable with white or red skin
Example
The farmer harvested fresh radishes from the garden.
农民从花园里收获了新鲜的小萝卜。
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 /rɪˈvoʊlt/

revolt

反抗
Meaning
to rebel against authority; to feel disgust
Example
The people revolted against the corrupt government.
人民反抗腐败的政府。
B2 noun /rɒd/

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 /ˈrɪɡ.ər.əs/

rigorous

严格
Meaning
Extremely thorough and demanding in analysis or practice.
Example
A rigorous study plan helps students achieve better results.
严格的学习计划帮助学生取得更好的成绩。
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 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 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 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。
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 verb /rɪˈkruːt/

recruit

招募
Meaning
to enlist or hire people for a job, service, or membership
Example
The company is trying to recruit more software engineers.
这家公司正在努力招募更多的软件工程师。
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 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。
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 noun /rɪˈmaɪndər/

reminder

提醒
Meaning
something that helps you remember a fact, event, or action that you need to do or recall
Example
He set a reminder to call his mother on her birthday.
他设置了一个提醒，提醒自己在母亲的生日打电话给她。
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。
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 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 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 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 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。
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 noun /ˌrezəˈveɪʃən/

Reservation

预订
Meaning
the action of reserving something; an arrangement whereby something is reserved for a particular person; a qualification to an expression of agreement or approval
Example
I made a reservation at the restaurant for tonight.
我为今晚在餐厅做了一个预定。
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 /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。
B2 noun /ˈreɪʃoʊ/

ratio

比例
Meaning
a relationship between two numbers showing how many times the first number contains the second
Example
The ratio of boys to girls in the class is 2:1.
班级中男生和女生的比例是2:1。
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 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。
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 /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 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 verb /ˌriː.kənˈstrʌkt/

reconstruct

重建
Meaning
to build or form something again after it has been damaged or destroyed
Example
The city was reconstructed after the earthquake.
这座城市在地震后重新建设。
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.
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。