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1water hyacinth
水葫芦
讲解可数名词，指一种漂浮水生植物，雅思阅读环境类话题常作为入侵物种出现
搭配water hyacinth invasion / spread of water hyacinth / control water hyacinth
近义aquatic weed / floating plant
派生hyacinth 风信子
Water hyacinth spreads rapidly across lakes, blocking sunlight and killing native fish.
水葫芦在湖泊中迅速蔓延，遮挡阳光并导致本地鱼类死亡。
2be detrimental to
对…有害的
讲解固定搭配，后接名词或动名词，语气正式，适合雅思大作文环境与健康话题
搭配be detrimental to health / be detrimental to the environment / prove detrimental to
近义harmful to / damaging to / adverse to
反义beneficial to / conducive to
Excessive use of pesticides is detrimental to both soil quality and human health.
过度使用农药对土壤质量和人类健康都有害。
3engage in doing sth.
从事于…
讲解后接动名词，强调参与某项活动，写作中可替换 do 使表达更正式
搭配engage in research / engage in physical activity / actively engage in
近义participate in / take part in / be involved in
反义withdraw from / refrain from
Many teenagers engage in playing online games for hours instead of doing homework.
许多青少年花数小时玩网络游戏而不做作业。
4pulley system
滑轮体系
讲解可数名词短语，描述机械装置，雅思听力地图或科技类阅读可能出现
搭配a simple pulley system / operate a pulley system / pulley system design
近义hoisting mechanism / lifting device
Ancient builders used a simple pulley system to lift heavy stones onto the pyramid.
古代建造者使用简单的滑轮系统将沉重的石块吊上金字塔。
5mimic one's actions
模仿某人的行为
讲解mimic 作动词，指有意或无意的模仿，常用于儿童发展或社会行为话题
搭配mimic behaviour / mimic accents / closely mimic
近义imitate / copy / mirror
反义differ from / diverge from
派生mimicry 模仿
Young children naturally mimic their parents' actions, copying both good and bad habits.
幼儿会自然模仿父母的行为，好坏习惯都照搬。
6for good
永远；永久
讲解副词短语，强调永久性，多与 disappear、leave、change 等动词连用，注意与 for good 表"为了好处"区分
搭配gone for good / leave for good / settle sth for good
近义permanently / forever / once and for all
反义temporarily / for the time being
The rare bird disappeared from this region for good after the forest was cleared.
森林被砍伐后，这种珍稀鸟类永远从该地区消失了。
7regional championship
地区锦标赛
讲解指某一地区范围内举办的锦标赛，常与 win/host/compete in 连用
搭配win the regional championship, host a regional championship, compete in the regional championship
近义local title, area tournament
派生regional champion（地区冠军）
Our school team won the regional championship after months of hard training.
我们校队经过数月刻苦训练后赢得了地区锦标赛。
8totemic animal
图腾动物
讲解指被部落或群体奉为象征、加以崇拜的动物，多用于人类学、文化类话题
搭配a totemic animal, worship a totemic animal, a totemic symbol
近义tribal emblem, sacred animal
派生totem（图腾）, totemism（图腾崇拜）
In many ancient cultures, the wolf served as a totemic animal symbolizing courage.
在许多古代文化中，狼是象征勇气的图腾动物。
9identical twins
同卵双胞胎
讲解指由同一受精卵发育而成、基因完全相同的双胞胎，与 fraternal twins（异卵）相对
搭配identical twins, a pair of identical twins, raise identical twins
近义monozygotic twins
反义fraternal twins, non-identical twins
Identical twins often share strikingly similar personalities and even facial expressions.
同卵双胞胎往往有着惊人相似的个性甚至面部表情。
10fence off (
用篱笆、围栏)隔开
讲解表示用篱笆或围栏把某区域隔开，后接被隔开的对象，常与 from 连用
搭配fence off an area, fence off a garden from the road
近义enclose, wall off, cordon off
派生fencing（围栏；击剑）
The council decided to fence off the playground to keep children away from traffic.
委员会决定把操场用围栏隔开，让孩子远离车流。
11radio signal
无线电信号
讲解指通过无线电波传输的信号，常用于天文、通信与科技类话题
搭配pick up a radio signal, transmit a radio signal, a weak radio signal
近义wireless signal, broadcast signal
派生signal（信号）, signalling（信号传输）
The telescope picked up a faint radio signal from a distant galaxy.
望远镜接收到来自遥远星系的一种微弱无线电信号。
12a recurring problem
一个反复出现的问题
讲解指反复出现、难以根除的问题，写作中可用来引出需长期解决的议题
搭配a recurring problem, tackle a recurring problem, a recurring issue
近义a persistent problem, a chronic problem
反义a one-off problem, an isolated incident
Traffic congestion has become a recurring problem in most rapidly growing cities.
交通拥堵已成为多数快速发展的城市中反复出现的问题。
13full membership
正式成员
讲解full membership 指享有全部权利的正式成员身份，常与 grant/apply for 连用。
搭配full membership of, grant full membership, apply for full membership
近义full status, full rights of membership
反义associate membership, provisional membership
派生member n. 成员；membership n. 会员资格
After three years of probation, she was finally granted full membership of the research institute.
经过三年试用期后，她终于获得了该研究所的正式成员资格。
14salient motif
重要主题
讲解salient 意为“显著的、突出的”，motif 指反复出现的主题，salient motif 多用于文学与学术分析。
搭配the salient motif of, a recurring motif, a central motif
近义dominant theme, recurring theme
派生salience n. 显著性；motif n. 主题，母题
The salient motif running through the novel is the struggle between memory and identity.
贯穿这部小说的一个重要主题是记忆与身份之间的斗争。
15permanent pasture
永久性牧场
讲解permanent pasture 指长期不翻耕、持续种草放牧的土地，常见于农业与环境类阅读。
搭配convert into permanent pasture, maintain permanent pasture, grazing pasture
近义long-term grassland, permanent grassland
反义arable land, temporary pasture
派生pasture n. 牧场；pastoral adj. 牧放的
Farmers are encouraged to convert degraded cropland into permanent pasture to prevent soil erosion.
农民被鼓励将退化的耕地改造成永久性牧场，以防止水土流失。
16condemn sb. for sth.
因某事责备某人
讲解condemn sb. for sth. 表示因某事强烈谴责某人，语气比 blame 更重，常用于新闻与议论文。
搭配condemn sb. for doing sth., be widely condemned, condemn sth. as
近义criticize, denounce
反义praise, commend
派生condemnation n. 谴责；condemnatory adj. 谴责的
The public condemned the company for discharging untreated waste into the river.
公众谴责该公司向河中排放未经处理的废物。
17habitat restoration
栖息地的恢复
讲解habitat restoration 指修复受损的动植物栖息环境，是生态保护类高频表达。
搭配habitat restoration project, fund habitat restoration, large-scale restoration
近义ecological restoration, habitat rehabilitation
反义habitat destruction, habitat loss
派生restore v. 恢复；restoration n. 恢复
Habitat restoration has helped several endangered bird species recover in this wetland reserve.
栖息地的恢复帮助这个湿地保护区内几种濒危鸟类得以恢复。
18hollow glass container
空心玻璃容器
讲解hollow glass container 指中空的玻璃容器，hollow 强调内部空心，常用于实验与工业描述。
搭配a sealed hollow container, a hollow glass tube, store in a container
近义hollow vessel, empty glass receptacle
反义solid container, filled container
派生hollow adj./v. 空心的/挖空；container n. 容器
The vaccine is stored in a sealed hollow glass container to keep it free from contamination.
疫苗被储存在密封的空心玻璃容器中，以防受到污染。
19at the expense of
以…为代价
讲解介词短语，作状语，后接被牺牲的事物，常用于雅思写作社会类话题
搭配at the expense of health / at the expense of quality / at the expense of others
近义at the cost of / to the detriment of
反义to the benefit of
Many companies pursue rapid growth at the expense of environmental protection and workers' well-being.
许多公司以牺牲环境保护和员工福祉为代价，追求快速扩张。
20constant supply
持续供应
讲解名词短语，constant 强调不间断，常与 of 搭配，多用于描述资源、能源或原料
搭配a constant supply of energy / ensure a constant supply / maintain a constant supply
近义a steady supply / an uninterrupted supply
反义an intermittent supply
A constant supply of clean water is essential for the survival of any large city.
持续供应的清洁水源对任何大城市的生存都至关重要。
21mitigate risk
降低风险
讲解动词短语，mitigate 比 reduce 更正式，多用于商业、环境与健康类写作
搭配mitigate the risk of / mitigate the impact / mitigate climate change
近义reduce risk / lessen risk
反义increase risk / heighten risk
Investors often diversify their portfolios to mitigate the risk of a market crash.
投资者常通过分散投资来降低市场崩盘的风险。
22exterior wall
外墙
讲解名词短语，exterior 指外部、外表，常用于建筑与设计类描述，与 interior 相对
搭配exterior walls / exterior design / the exterior of
近义outer wall / external wall
反义interior wall / inner wall
The exterior walls of the building were painted white to reflect sunlight and save energy.
这栋建筑的外墙被漆成白色，以反射阳光并节约能源。
23human bias
人类偏见
讲解名词短语，bias 指偏向、成见，human 强调其源自人的主观，多用于学术与心理学话题
搭配cognitive bias / unconscious bias / reduce human bias
近义prejudice / partiality
反义objectivity / impartiality
Human bias can influence how researchers interpret data, even when they try to be objective.
人类偏见会影响研究者解读数据的方式，即便他们努力保持客观。
24distortion of perception
认知扭曲
讲解名词短语，distortion 指扭曲、失真，perception 指感知，多用于心理学与媒体类话题
搭配cause a distortion of perception / visual distortion
近义perceptual distortion / distorted perception
派生distort (v.) / distorted (adj.)
Advertisers sometimes exploit a distortion of perception to make products appear more attractive.
广告商有时会利用认知扭曲，让产品显得更具吸引力。
25click beetle
叩头虫
讲解指叩甲科昆虫，因受惊时前胸弹动发出咔嗒声并跃起而得名，常出现在自然类阅读中
搭配click beetle larvae / a species of click beetle
近义snapping beetle / skipjack
派生click beetles（复数）
When you touch a click beetle, it snaps its body and flips into the air.
当你触碰叩头虫时，它会弹动身体并翻跳到空中。
26animal aggression instinct
动物进攻性本能
讲解学术表达，指动物与生俱来的攻击倾向，写作中常与 nurture、territoriality 等话题搭配
搭配innate aggression instinct / trigger aggression instinct
近义aggressive instinct / innate aggression
反义learned behaviour
Scientists argue that animal aggression instinct is largely driven by competition for territory and mates.
科学家认为，动物的进攻性本能很大程度上是由对领地和配偶的竞争驱动的。
27let off steam
放松一下；释放多余的精力
讲解口语高频，指通过活动发泄积压的情绪或精力，多用于压力、学习、工作类话题
搭配let off steam by doing sth / need to let off steam
近义blow off steam / unwind
反义bottle up one's feelings
After a long week of exams, students need to let off steam by playing sports or chatting with friends.
经过一周漫长的考试，学生们需要通过运动或与朋友聊天来放松一下。
28environmental practice
环保行为
讲解指有利于环境的日常做法，写作环境类话题中常用来举例说明个人责任
搭配adopt environmental practices / sustainable environmental practice
近义eco-friendly behaviour / green practice
反义environmentally harmful practice
Recycling and using public transport are simple environmental practices that individuals can adopt.
回收利用和乘坐公共交通是个人可以采取的简单环保行为。
29breeding rate
繁殖率
讲解指种群繁殖的速度或频率，生态类阅读与写作中常与 decline、reduce 等动词连用
搭配a high breeding rate / reduce the breeding rate
近义reproductive rate / birth rate
反义mortality rate
Pollution and habitat loss have sharply reduced the breeding rate of many wild bird species.
污染和栖息地丧失已使许多野生鸟类的繁殖率急剧下降。
30make a complaint
投诉
讲解表示正式提出不满，比 complain 更强调动作本身，常用于服务、消费类场景
搭配make a complaint about sth / make a formal complaint
近义lodge a complaint / file a complaint
反义express satisfaction
If the hotel does not fix the noise problem, I will make a complaint to the manager.
如果酒店不解决噪音问题，我将向经理投诉。
31wide range of refreshments
各式各样的茶点
用 表示种类繁多，常用于描述食物、选择、服务等；refreshments 指会议、活动中的茶点饮料，通常用复数。
搭配a wide range of options / a wide range of products / a wide range of activities
近义a variety of refreshments / a diverse selection of refreshments
反义a limited range of refreshments
The conference organizers provided a wide range of refreshments, from fresh fruit to assorted pastries.
会议组织者提供了各式各样的茶点，从新鲜水果到各式糕点。
32originate in/from
起源于，由…引起/产生
用 originate in 后接地点或事物，originate from 后接来源、起点；两者常可互换，但 in 更强调发源地，from 更强调来源。
搭配originate from Latin / originate in ancient China / originate from a misunderstanding
近义stem from / derive from / come from
反义result in / lead to
Many English words originate from Latin, which explains their similar spellings and meanings.
许多英语单词起源于拉丁语，这解释了它们相似的拼写和含义。
33general adaptability
一般适应性
用 general 表示“总的、一般的”，adaptability 指适应能力；该短语常用于学术写作中描述生物、系统或人的适应力。
搭配show general adaptability / demonstrate general adaptability / lack general adaptability
近义overall flexibility / broad adaptability
反义rigid specialization / inflexibility
派生adaptable (adj.) / adapt (v.) / adaptation (n.)
The general adaptability of these plants allows them to survive in various climate conditions.
这些植物的一般适应性使它们能够在各种气候条件下生存。
34bold realism
大胆直白的现实主义
用 bold 强调“大胆的、鲜明的”，realism 指“现实主义”；该短语常用于文学、艺术评论中，表示作品直面现实、不加粉饰。
搭配a style of bold realism / embrace bold realism / bold realism in literature
近义stark realism / gritty realism
反义romantic idealism / escapism
派生realist (n.) / realistic (adj.) / realistically (adv.)
The novel's bold realism shocked readers by depicting poverty and violence without any romanticism.
这部小说大胆直白的现实主义通过毫无浪漫化地描绘贫困与暴力而令读者震惊。
35casual clothes
便装
用 casual clothes 指非正式的日常穿着，与 formal wear 相对；雅思口语中常出现在工作、时尚、生活方式话题。
搭配wear casual clothes / dress in casual clothes / casual clothes policy
近义informal clothing / casual wear
反义formal wear / business attire
派生casualness (n.) / casually (adv.)
Many companies now allow employees to wear casual clothes to work on Fridays.
许多公司现在允许员工在周五穿便装上班。
36an avalanche of
蜂拥而来的
用 an avalanche of 表示“大量涌来的”，常接 complaints, emails, questions 等，强调数量多且来势迅猛。
搭配an avalanche of complaints / an avalanche of emails / an avalanche of criticism
近义a flood of / a deluge of / a barrage of
反义a trickle of
After the advertisement went viral, the company received an avalanche of complaints from customers.
广告走红后，公司收到了蜂拥而来的顾客投诉。
37convert into
把…转化为…
讲解convert A into B 表示把A转变成B，强调形态或用途的根本改变，常用于科技、能源、经济类话题。
搭配convert into energy / convert into cash / convert a building into flats
近义turn into / transform into / change into
反义keep as / preserve
派生conversion n. 转化；convertible adj. 可转化的
The new factory will convert raw materials into finished goods more efficiently.
新工厂将更高效地把原材料转化为成品。
38write a dissertation
写论文
讲解dissertation 指学位论文，尤指本科或硕士毕业论文，比 essay 正式、篇幅更长。
搭配write a dissertation / a doctoral dissertation / submit a dissertation
近义thesis / paper
派生dissertation-based adj. 基于论文的
She spent the whole summer writing a dissertation on climate change policy.
她整个夏天都在写一篇关于气候变化政策的论文。
39a blot on the landscape
影响景观的物体
讲解a blot on the landscape 指破坏自然景观的丑陋建筑或物体，含贬义，常用于环境与规划话题。
搭配be a blot on the landscape / an eyesore
近义eyesore / disfigurement
反义beauty spot / scenic attraction
The huge power station is widely regarded as a blot on the landscape.
这座巨大的发电站被普遍视为煞风景之物。
40drainage channel
排水渠
讲解drainage channel 指人工修建用于排走地表水的沟渠，多用于农业、市政和防洪语境。
搭配a drainage channel / dig a drainage channel / blocked drainage channel
近义drain / ditch / culvert
派生drain v. 排水；drainage n. 排水系统
Heavy rain overflowed the drainage channel and flooded the nearby fields.
大雨使排水渠溢流，淹没了附近的田地。
41the cavalcade of luggage
一堆行李
讲解the cavalcade of luggage 是形象说法，指数量庞大、接连不断的一堆行李，含夸张语气。
搭配a cavalcade of luggage / a mountain of luggage
近义a mountain of luggage / piles of baggage
After the conference, we struggled through the airport with the cavalcade of luggage.
会议结束后，我们拖着那一大堆行李艰难地穿过机场。
42solar energy
太阳能
讲解solar energy 指利用太阳辐射产生的能源，是可再生能源话题的高频表达。
搭配solar energy / solar power / solar panel / renewable energy
近义solar power / sunlight energy
派生solar adj. 太阳的；solar-powered adj. 太阳能的
Many countries are investing heavily in solar energy to reduce carbon emissions.
许多国家正大力投资太阳能以减少碳排放。
43divide into
把…拆分成…
讲解表示把整体拆成若干部分，常用 divide sth into + 数量/部分，被动 be divided into 也常见
搭配divide into groups, divide into two parts, be divided into categories
近义split into, break down into, separate into
反义combine into, merge into
派生division, divisible, divider
The teacher asked us to divide the class into four groups for the debate.
老师让我们把班级分成四个小组进行辩论。
44emergent nation state
新兴国家
讲解指刚独立或新成立的国家，常用于历史、政治类雅思阅读写作语境
搭配emergent nation state, newly emergent state, fragile nation state
近义newly independent state, young nation, fledgling country
反义established state, mature nation
派生emergence, emerging, emergent
The emergent nation state struggled to build stable institutions after independence.
这个新兴国家在独立后努力建立稳定的制度。
45underwater cable
水下电缆
讲解常出现在科技、全球化类话题中，指铺设在海底、用于通信或输电的电缆
搭配lay underwater cables, submarine cable network, fibre-optic cable
近义submarine cable, undersea cable, marine cable
派生cable, cabling
Underwater cables carry most international internet traffic between continents.
水下电缆承担了各大洲之间大部分国际互联网流量。
46treasure trove
无主财宝；宝藏
讲解除“无主财宝”外，常引申为“宝库、丰富来源”，a treasure trove of sth
搭配a treasure trove of information, a treasure trove of knowledge, a rich treasure trove
近义goldmine, rich source, storehouse
反义barren source, empty vault
派生treasure, trove
The old library proved a treasure trove of rare maps and manuscripts.
这座旧图书馆堪称稀有地图和手稿的宝库。
47fleshy husk
肉质的外壳
讲解多用于生物、农业类描述，fleshy 指“肉质的”，husk 指谷物或果实的外壳
搭配fleshy husk, outer husk, remove the husk
近义thick skin, outer covering, rind
反义thin shell, bare seed
派生flesh, fleshy, husk
The fleshy husk protects the seed until it is ready to grow.
肉质的外壳保护种子直到它准备生长。
48turbo code
涡轮码
讲解通信工程术语，指一种高效纠错编码，常见于科技类阅读或学术背景介绍
搭配turbo code, error-correcting code, coding scheme
近义error-correction code, channel code
派生turbo, coding, encode
Turbo codes greatly improved the reliability of digital communication systems.
涡轮码大大提高了数字通信系统的可靠性。
49relieve stress
缓解压力
讲解及物动词短语，后接压力、疼痛等抽象名词；雅思健康类话题常用。
记忆re(再)+lieve(轻)→再变轻→减轻。
搭配relieve stress/pressure/pain/tension
近义ease stress, reduce stress, alleviate stress
反义increase stress, aggravate stress
Taking a short walk after work can help relieve stress and clear your mind.
下班后短暂散步有助于缓解压力、理清思绪。
50build a furnace
建一个火炉
讲解动词短语，build 后接具体设施名词；历史类阅读中常见。
记忆furnace 与 fire 同源，联想“生火之处”。
搭配build a furnace, coal furnace, blast furnace
近义construct a furnace, set up a furnace
派生furnace 火炉；熔炉
Early settlers had to build a furnace to keep warm during the harsh winter.
早期定居者必须建一个火炉，才能在严冬中取暖。
51glacial episode
冰河期
讲解地质学术语，episode 此处指一段地质时期；雅思阅读自然环境类高频。
记忆glacial(冰的)+episode(时期)→冰期。
搭配glacial episode, glacial period, glacial retreat
近义ice age, glacial period
派生glacier 冰川；glaciation 冰川作用
During the last glacial episode, huge ice sheets covered much of northern Europe.
在最后一次冰河期，巨大的冰盖覆盖了北欧大部分地区。
52instant feedback
即时反馈
讲解名词短语，常与 provide/give/receive 搭配；教育科技类话题常用。
记忆instant(立即的)+feedback(反馈)→即时反馈。
搭配provide instant feedback, receive instant feedback, positive feedback
近义immediate feedback, real-time feedback
反义delayed feedback
Online courses often provide instant feedback, which helps students correct mistakes quickly.
在线课程通常提供即时反馈，这有助于学生快速纠正错误。
53horticultural architecture
园艺建筑
讲解偏学术名词短语，指园林设计中的建筑元素；艺术设计类阅读可能出现。
记忆horticultural(园艺的)+architecture(建筑)→园艺建筑。
搭配horticultural architecture, landscape architecture, garden design
近义garden architecture, landscape design
派生horticulture 园艺学；horticulturist 园艺师
The garden combines horticultural architecture with native plants to create a natural look.
这座花园将园艺建筑与本地植物结合，营造出自然的外观。
54favourable appraisal
有利的评价
讲解正式名词短语，appraisal 指评估、评价；常用于学术或商务语境。
记忆favourable(有利的)+appraisal(评价)→好评。
搭配favourable appraisal, performance appraisal, critical appraisal
近义positive assessment, favourable evaluation
反义unfavourable appraisal, negative assessment
派生appraise 评估；appraisal 评价
The new policy received a favourable appraisal from most environmental experts.
新政策得到了大多数环境专家的有利评价。
55reliable information
可靠的信息
讲解reliable 强调“可信赖的”，常修饰 information、source、data 等；写作中可用于论证数据来源的权威性。
搭配reliable information, reliable source, reliable data
近义trustworthy information, credible information, dependable information
反义unreliable information, misleading information
Researchers insist that only reliable information should be cited in academic papers.
研究人员坚持认为，学术论文中只应引用可靠的信息。
56weekly schedule
周计划
讲解weekly schedule 指以周为单位的时间安排，口语中常与 draw up、stick to、follow 搭配。
搭配draw up a weekly schedule, follow a weekly schedule, a busy weekly schedule
近义weekly plan, weekly timetable, weekly agenda
反义daily schedule（时间跨度不同，非严格反义）
Drawing up a weekly schedule helps students balance study, part-time work and leisure.
制定周计划有助于学生平衡学习、兼职和休闲。
57air currents
气流
讲解air currents 指空气的流动，地理、气象类阅读中常见；current 此处意为“水流/气流”，非“当前的”。
搭配rising air currents, warm air currents, ocean currents
近义air flow, air movement, wind currents
派生current（n. 水流，气流，电流）
Birds and gliders rely on rising air currents to stay aloft for hours.
鸟类和滑翔机依靠上升气流在空中停留数小时。
58neonatal hospital ward
新生儿病房
讲解neonatal 意为“新生儿的”，属医学词汇，多用于正式或学术语境；ward 指医院病房。
搭配neonatal ward, neonatal care, neonatal unit
近义newborn ward, infant ward
派生neonate（n. 新生儿）, neonatal（adj. 新生儿的）
The neonatal hospital ward is kept quiet so that premature babies can rest.
新生儿病房保持安静，以便早产儿休息。
59marine life
海洋生物
讲解marine life 为不可数集合名词，指海洋中的全部生物；环保类写作高频表达。
搭配protect marine life, marine life diversity, harm marine life
近义ocean life, sea creatures, aquatic life
反义terrestrial life
Plastic waste in the ocean poses a serious threat to marine life.
海洋中的塑料垃圾对海洋生物构成严重威胁。
60cardiovascular performance
心血管功能
讲解cardiovascular 意为“心血管的”，医学与健康类话题常用；performance 此处指身体机能表现。
搭配improve cardiovascular performance, cardiovascular health, cardiovascular disease
近义heart function, cardiac performance
派生cardiovascular（adj. 心血管的）, cardiac（adj. 心脏的）
Regular aerobic exercise can significantly improve cardiovascular performance.
规律的有氧运动能显著改善心血管功能。