📚 KS3 Cambridge Economics: Key Terms Memorisation Guide | KS3 剑桥经济：词汇术语速记指南
Welcome to your essential revision companion for KS3 Cambridge Economics. This guide is designed to help you learn and remember the most important vocabulary you will encounter in your course. Economics can often feel like a new language, packed with concepts that are sometimes abstract and easy to mix up. By using simple memory tricks, vivid examples, and clear definitions, you will turn these terms into your permanent mental toolkit. Let’s dive into the building blocks of how our world manages its limited resources.
欢迎使用你的 KS3 剑桥经济必备复习指南。本指南旨在帮助你学习并记住课程中最重要的词汇。经济学常常像一门新语言，充满了有时抽象且容易混淆的概念。通过简单的记忆技巧、生动的例子和清晰的定义，你将把这些术语变成永久的思维工具箱。让我们深入了解我们世界如何管理其有限资源的基本构件吧。
1. Scarcity and Choice | 稀缺性与选择
Scarcity is the fundamental economic problem – unlimited wants meet limited resources. Think of it as a pizza with only eight slices but ten hungry friends. You can remember the word ‘scarcity’ by picturing a ‘scarce’ diamond, something so rare that everyone wants it. Choice follows directly: because we cannot have everything, we must decide what to produce, how to produce it and for whom. In your daily life, scarcity forces you to choose between spending your pocket money on sweets or saving for a bigger toy.
稀缺性是基本的经济问题——无限的欲望遇上有限的资源。把它想象成一个只有八块却来了十个饥饿朋友的比萨。你可以通过想象一颗“稀缺”的钻石来记住‘scarcity’这个词，它是如此稀有以至于人人都想要。选择随之而来：因为我们无法拥有一切，我们必须决定生产什么、如何生产以及为谁生产。在你的日常生活中，稀缺性迫使你在用零花钱买糖果还是攒钱买更大的玩具之间做出选择。
- Memory hook: Scar + City → a city with very little food, so everyone must choose carefully.
- 记忆挂钩： Scar（伤疤）+ City（城市）→ 一个食物匮乏的城市，每个人必须谨慎选择。
2. Opportunity Cost | 机会成本
n your pocket; it is the value of the next best alternative you give up when making a choice. When you choose to play video games for an hour, the opportunity cost is the lost chance to study maths or go outside. The term sounds fancy, but break it down: ‘opportunity’ + ‘ ssed opportunity. Every decision has this hidden price tag, even if no coins change hands.
机会成本不是你口袋里的钱；它是你做出选择时放弃的次优选项的价值。当你选择玩一小时电子游戏时，机会成本就是失去了学习数学或外出的机会。这个术语听起来很花哨，但分解一下：‘机会’+‘成本’ = 错过的机会的代价。每个决定都有这个隐藏的价签，哪怕根本没有金钱易手。
- Memory hook: OC → ‘Oh, See’ what you gave up!
- 记忆挂钩： OC → “哦，看”你放弃了什么！
3. Needs and Wants | 需求与欲望
A need is something essential for survival, like water, food, shelter and basic clothing. A want is everything else that makes life nicer but is not necessary, such as a smartphone, designer trainers or concert tickets. Imagine a sailing boat: the hull is your needs (it keeps you afloat), and the fancy sail design is your wants (it makes the boat pretty but is not vital). The distinction helps economists understand consumer behaviour and how people prioritise spending when money is tight.
需求是生存所必需的东西，如水、食物、住所和基本衣物。欲望则是其他一切让生活更美好但并非必需的东西，比如智能手机、名牌运动鞋或音乐会门票。想象一艘帆船：船体是你的需求（它让你浮在水上），而花哨的船帆设计就是你的欲望（它让船漂亮但并非关键）。这一区别有助于经济学家理解消费者行为以及人们在缺钱时如何优先安排支出。
- Memory hook: You need knees (needs), you want a watch (wants).
- 记忆挂钩： 你需要膝盖（needs），你想要手表（wants）。
4. Goods and Services | 商品与服务
Goods are tangible items you can touch, carry and own, like a loaf of bread, a bicycle or a notebook. Services are intangible actions done for you by someone else, such as a haircut, a bus ride or a medical check-up. Remember the phrase: ‘Goods you can drop on your foot; services you can’t.’ The economy relies on both; factories produce goods, while hospitals, schools and transport networks deliver services.
商品是你能够触摸、携带和拥有的有形物品，比如一条面包、一辆自行车或一个笔记本。服务是别人为你完成的无形行为，比如理发、乘坐公交车或体检。记住这个说法：“商品你能砸到脚；服务你不能。”经济同时依赖两者；工厂生产商品，而医院、学校和交通网络提供服务。
| Goods / 商品 | Services / 服务 |
| Furniture / 家具 | Education / 教育 |
| Clothes / 衣服 | Banking / 银行服务 |
| Books / 书籍 | Policing / 警务 |
5. Producers and Consumers | 生产者与消费者
A producer makes or supplies goods and services, while a consumer uses or buys them. Picture a bakery: the baker is the producer, and the customers buying bread are consumers. Sometimes the same person can be both – when a teacher earns a salary and then buys groceries, she is a producer of education and a consumer of food. The term ‘prosumer’ is not needed at KS3, but it’s a cool extra fact.
生产者制造或提供商品与服务，而消费者使用或购买它们。想象一家面包店：面包师是生产者，买面包的顾客是消费者。有时同一个人可以同时充当两者——当一位老师赚了薪水然后购买食品时，她就是教育的生产者和食物的消费者。“产消者”这个术语在 KS3 阶段不需要，但它是一个有趣的额外知识。
- Memory hook: Pro-d-u-cer → provides; Con-s-u-mer → consumes. The middle ‘d’ vs ‘s’ helps.
- 记忆挂钩： 生产者（producer）→ 提供（provides）；消费者（consumer）→ 消费（consumes）。中间的‘d’和‘s’有助于区分。
6. Supply and Demand | 供给与需求
Supply is how much of a product producers are willing and able to offer at various prices. Demand is how much consumers are willing and able to buy at those prices. When demand rises and supply stays the same, prices tend to shoot up – think of ice cream on a scorching summer day. Use the visual trick: ‘Supply Sends products up the store; Demand Decides who gets them.’ The interaction of supply and demand determines the market price for nearly everything.
供给是生产者在不同价格下愿意且能够提供的产品数量。需求是消费者在不同价格下愿意且能够购买的数量。当需求上升而供给不变时，价格往往会飙升——想想炎炎夏日的冰淇淋。使用视觉技巧：“供给（Supply）将产品送到商店；需求（Demand）决定谁得到它们。”供求相互作用决定了几乎所有商品的市场价格。
- Memory hook: Draw two curves: an S for Supply (sloping up) and a D for Demand (sloping down). S up, D down.
- 记忆挂钩： 画两条曲线：S 代表供给（向上倾斜），D 代表需求（向下倾斜）。S 向上，D 向下。
7. Market and Price | 市场与价格
A market is any arrangement that allows buyers and sellers to exchange goods or services. It does not have to be a physical place with stalls; an online auction or a job-seeking platform is also a market. Price is the amount of money a buyer pays and a seller receives for one unit of a product. In a free market, prices act like traffic lights – they signal to producers what to make more of and to consumers what to buy less of. Remember: ‘Market is the meeting; price is the messenger.’
市场是允许买家和卖家交换商品或服务的任何安排。它不一定是一个有摊位的实体场所；在线拍卖或求职平台也是一个市场。价格是买家支付和卖家收到的一单位产品的货币金额。在自由市场中，价格像交通信号灯一样——它们向生产者发出多生产什么的信号，向消费者发出少买什么的信号。记住：“市场是聚会；价格是信使。”
- Memory hook: e a big boat where everyone brings things to trade). Price = PRICe → Pay Required In Cash.
- 记忆挂钩： Market（市场）= Meet（见面）+ Ark（方舟，像一艘大家带着东西交易的大船）。Price（价格）= PRICe → Pay Required In Cash（需现金支付）。
8. Money and Exchange | 货币与交换
Money is any item that is widely accepted as payment for goods, services and debts. It performs three main functions: medium of exchange (it avoids barter), store of value (it can be saved), and unit of account (it measures worth). Without money, we would have to barter – swapping a chicken for a sack of potatoes, which is messy and requires a double coincidence of wants. The phrase ‘Money Makes Mice Move’ reminds us of the three Ms: Medium, Measure, Store.
货币是任何被广泛接受为商品、服务和债务支付手段的物品。它发挥三种主要功能：交换媒介（避免以物易物）、价值储藏（可以储蓄）和计价单位（衡量价值）。没有货币，我们就不得不以物易物——用一只鸡换一袋土豆，这既麻烦又需要欲望的双重巧合。短语“Money Makes Mice Move（钱让老鼠动起来）”提醒我们三个 M：媒介（Medium）、衡量（Measure）、储藏（Store）。
| Function / 功能 | Explanation / 解释 |
| Medium of Exchange / 交换媒介 | It is accepted to buy things. / 被接受用于购买物品。 |
| Store of Value / 价值储藏 | It holds value over time. / 随时间保持价值。 |
| Unit of Account / 计价单位 | It marks price tags. / 标注价格标签。 |
9. Specialisation and Division of Labour | 专业化与劳动分工
Specialisation happens when individuals, businesses or countries focus on producing a limited range of goods or services. Division of labour breaks a production process into small, specialised tasks done by different workers. Adam Smith’s famous pin factory example shows that when each worker does one small job, output soars. The phrase ‘Practice makes perfect’ is the key – a specialist gets very skilled at one task, saving time and raising quality. But beware: doing the same thing repeatedly can be boring, which is a disadvantage.
专业化发生在个人、企业或国家专注于生产有限种类的商品或服务时。劳动分工将生产过程分解成由不同工人完成的小型专项任务。亚当·斯密著名的别针工厂例子表明，当每个工人做一个小工作时，产量会飙升。“熟能生巧”这句话是关键——专家精通一项任务，节省时间并提高质量。但要当心：重复做同一件事可能会很无聊，这是一个缺点。
- Memory hook: art People Excel, Create Income, Attract Learning. Division of Labour = Do One Little Job.
- 记忆挂钩： Specialisation（专业化）= Smart People Excel, Create Income, Attract Learning（聪明人胜出，创造收入，吸引学习）。Division of Labour（劳动分工）= Do One Little Job（做一份小工作）。
10. Economic Systems | 经济体系
An economic system is the way a country organises the production, distribution and consumption of goods and services. The two main types are market economy (where decisions are driven by private choices and prices) and command economy (where the government makes the key decisions). Most countries have a mixed economy, blending both. Use the traffic analogy: in a market economy, drivers choose their own routes; in a command economy, a central controller directs every car. The mixed economy is like having traffic lights with some government road rules.
经济体系是一个国家组织商品和服务的生产、分配和消费的方式。两种主要类型是市场经济（决策由私人选择和价格驱动）和指令经济（政府做出关键决策）。大多数国家实行混合经济，将两者结合。用交通作类比：在市场经济中，司机选择自己的路线；在指令经济中，中央控制器指挥每辆车。混合经济就像有交通信号灯和一些政府交通规则。
- Memory hook: Market = me first; Command = captain decides; Mixed = me + captain share the wheel.
- 记忆挂钩： 市场（Market）= 我先（me first）；指令（Command）= 船长（captain）决定；混合（Mixed）= 我和船长共享方向盘。
11. Savings and Investment | 储蓄与投资
Saving means putting aside part of your income for future use, often in a bank account. Investment is using money to create something that will generate future income, such as buying machinery or training. The key difference: saving is safe and usually low-return; investment carries risk but can grow your money faster. A simple trick: ‘Save for a rainy day; Invest for a sunnier future.’ Both are crucial for a healthy economy, as savings provide banks with funds to lend, while investment drives productivity.
储蓄意味着把一部分收入留作将来使用，通常存入银行账户。投资是用钱创造能在未来产生收入的东西，比如购买机器或接受培训。关键区别：储蓄安全且通常回报较低；投资有风险但能让你的钱增长更快。一个简单的技巧：“储蓄为雨天；投资为更晴朗的未来。”两者对健康的经济都至关重要，因为储蓄为银行提供贷款资金，而投资推动生产力。
- Memory hook: Saving = Storing nuts (like a squirrel); Investment = Planting seeds (for more trees).
- 记忆挂钩： 储蓄（Saving）= 储存坚果（像松鼠）；投资（Investment）= 播种（为了更多树木）。
12. Sustainability and Resources | 可持续性与资源
Sustainability means meeting our own needs without compromising the ability of future generations to meet theirs. It links closely to how we use resources – the inputs used to produce goods and services. Resources can be renewable (like solar energy, forests if managed well) or non-renewable (like coal, oil). Economic decisions today affect the planet tomorrow. Remember the triple bottom line: People, Planet, Profit (‘3 Ps’). A sustainable choice considers all three, not just short-term money gain.
可持续性意味着满足我们自己的需求而不损害后代满足他们需求的能力。它与我们如何使用资源密切相关——资源是用于生产商品和服务的投入。资源可以是可再生的（如太阳能、管理得当的森林）或不可再生的（如煤、石油）。今天的经济决策会影响明天的地球。记住三重底线：人（People）、星球（Planet）、利润（Profit）——“3P”。可持续的选择会考虑所有三者，而不仅仅是短期的金钱收益。
- Memory hook: ‘Sustain’ ability – think of a chain that keeps the bike going; you must not break the chain of resources.
- 记忆挂钩： ‘Sustain’ ability（维持的能力）—— 想象一条保持自行车前进的链条；你一定不能破坏资源之链。
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