📚 Year 8 CIE Economics: Vocabulary Terminology Quick-Reference Guide | Year 8 CIE 经济：词汇术语速记指南
Mastering economics starts with understanding its language. This quick-reference guide breaks down the essential terms you'll meet in the Year 8 CIE Economics course, giving you clear definitions, real-world examples, and clever memory tricks to help you learn faster and remember longer. Whether you are revising for a test or building a strong foundation for future studies, these concise paired explanations in English and Chinese will make economic vocabulary feel second nature.
掌握经济学始于理解它的语言。这份速记指南将帮你拆解 Year 8 CIE 经济课程中最关键的术语，提供清晰的定义、贴近生活的例子和巧妙的记忆技巧，让你学得更快、记得更牢。无论是准备测验还是为未来学习打好基础，这些简洁的中英双语解释会让经济词汇变得像呼吸一样自然。
1. Scarcity and Choice | 稀缺与选择
Scarcity is the fundamental economic problem. It means that while our wants are unlimited, the resources available to satisfy them — such as time, money, land and labour — are finite. Because of scarcity, individuals, firms and governments cannot have everything they desire and must make careful choices.
稀缺性是经济学的基本问题。它意味着尽管我们的欲望是无限的，但用来满足这些欲望的资源——比如时间、金钱、土地和劳动力——是有限的。由于稀缺性的存在，个人、企业和政府无法拥有想要的一切，必须做出审慎的选择。
Choice is the decision to pick one option over another. Every choice involves a trade-off, where we give something up to get something else. In economics, we assume that people weigh the costs and benefits before making a choice to maximise their satisfaction or profit.
选择是指决定选取一种方案而放弃另一种。每一次选择都伴随着权衡取舍，我们放弃某样东西以换取另一样。经济学中通常假设人们在做出选择前会权衡成本与收益，以实现最大化满足感或利润。
Memory tip: Think of 'SC' — Scarcity leads to Choice. Whenever you see a queue or hear about a limited edition, you are witnessing scarcity in action.
记忆技巧： 记住 'SC' — Scarcity（稀缺）导致 Choice（选择）。每当你看到排长队或听到“限量版”时，稀缺性就在眼前。
2. Opportunity Cost | 机会成本
Opportunity cost is the value of the next best alternative forgone when a choice is made. It is not all the options you gave up, only the highest-valued alternative. For example, if you spend one hour studying economics instead of playing video games, the opportunity cost is the enjoyment you would have gained from gaming.
机会成本指当做出一个选择时，所放弃的次优选项的价值。它不是放弃的所有选项，而是价值最高的那个替代方案。例如，你花一个小时学习经济而不是打游戏，机会成本就是打游戏带来的乐趣。
A common mistake is to treat opportunity cost as money alone. It can involve time, experience, or any other benefit lost. Governments also face opportunity costs when they allocate a budget to building a hospital instead of a new school.
常见的错误是把机会成本仅仅看作金钱。它可以涉及时间、经历或任何其他失去的收益。政府同样会面临机会成本，当它把预算用来建造医院而不是一所新学校时，所放弃的就是新学校带来的好处。
Memory tip: Use the phrase 'Next Best Alternative Forgone' and form the acronym NBAF. Every time you make a decision, ask yourself: 'What is my NBAF?'
记忆技巧： 用短语 'Next Best Alternative Forgone' 形成首字母缩写 NBAF。每次做决定时问自己：'我的 NBAF 是什么？'
3. Needs and Wants | 需要与欲望
Needs are goods and services essential for survival, such as food, clean water, shelter and basic clothing. Wants are things we desire but are not necessary to stay alive, like smartphones, cinema tickets or designer shoes. The line between needs and wants can sometimes blur depending on the society and period in which we live.
需要是维持生存所必需的商品和服务，如食物、干净的水、住所和基本衣物。欲望是我们渴望但并非生存所必需的东西，比如智能手机、电影票或名牌鞋。需要与欲望的界限有时会因我们生活的社会和时代而变得模糊。
In economics, understanding the difference helps explain consumer behaviour. When income is low, households spend a larger proportion on needs; as income rises, they tend to spend more on wants. This is one reason businesses continuously create new versions of products — to turn yesterday's wants into today's perceived needs.
在经济学中，理解这一区别有助于解释消费者行为。当收入较低时，家庭花在需要上的比例更大；随着收入上升，他们倾向于在欲望上增加支出。这也是企业不断推出新版产品的原因之一——把昨天的欲望变成今天人们心中理所当然的需要。
Memory tip: 'Needs keep you alive; wants make life fun.' If you can survive without it for a month, it is likely a want.
记忆技巧： '需要让你活着；欲望让生活有趣。'如果某样东西没有它你也能活一个月，那它很可能是欲望。
4. Factors of Production | 生产要素
The four factors of production are the resources used to produce goods and services. They are commonly remembered by the acronym CELL: Capital, Enterprise, Land and Labour. Each factor earns a reward: capital earns interest, enterprise earns profit, land earns rent, and labour earns wages.
生产要素是用于生产商品和服务的资源，通常用首字母缩略词 CELL 记忆：Capital（资本）、Enterprise（企业家才能）、Land（土地）和 Labour（劳动力）。每一种要素都获得一种报酬：资本获得利息，企业家才能获得利润，土地获得地租，劳动力获得工资。
Land refers to all natural resources — not only the ground but also forests, minerals, water and climate. Labour is the human effort, both physical and mental, involved in production. Capital includes man-made tools, machinery and buildings used to make other goods. Enterprise is the special factor that organises the other three and takes the risk of starting a business.
土地指所有自然资源——不仅是地面，还包括森林、矿产、水源和气候。劳动力是生产中所付出的人类体力和脑力。资本包括用于生产其他商品的人造工具、机器和建筑物。企业家才能是整合其他三种要素并承担创业风险的特殊要素。
Memory tip: Picture a mobile phone signal 'CELL'. Without all four factors working together, the phone (good or service) would not reach your hand.
记忆技巧： 想象一个手机信号 'CELL'。没有四要素协同工作，这部手机（商品或服务）就不会来到你手中。
5. Goods and Services | 商品与服务
Goods are tangible items you can touch and store, such as books, apples and bicycles. Services are intangible acts that satisfy wants and needs, such as haircuts, education and public transport. Both are the outputs produced by combining factors of production.
商品是可以触摸和储存的有形物品，比如书、苹果和自行车。服务是满足欲望和需要的无形行为，比如理发、教育和公共交通。两者都是组合生产要素而生产出来的产出。
Goods can be further classified into consumer goods (used directly by individuals) and capital goods (used to produce other goods). Durable goods, like cars, last a long time, while non-durable goods, like food, are consumed quickly. Free goods, such as sunlight and air, are naturally abundant and have no opportunity cost.
商品可以进一步分为消费品（直接由个人使用）和资本品（用于生产其他商品）。耐用品如汽车寿命较长，而非耐用品如食物则很快被消耗。自由物品如阳光和空气是自然界充足的，没有机会成本。
Memory tip: 'Goods can be in a bag; services cannot.' Ask yourself: would it fit in a shopping bag? If yes, it is likely a good.
记忆技巧： '商品能装进包里；服务不能。'问问自己：这东西能放进购物袋吗？如果能，那它很可能是商品。
6. Demand | 需求
Demand is the willingness and ability of consumers to purchase a good or service at a given price over a period of time. It is not just wanting something; you must be able to pay for it. The law of demand states that, ceteris paribus, as the price rises, quantity demanded falls, and vice versa.
需求是消费者在给定时间内以某一价格购买商品或服务的意愿和能力。它不仅仅是想拥有某样东西，你必须有支付能力。需求定律指出，在其他条件不变的情况下，价格上升，需求量下降；价格下降，需求量上升。
Several factors can shift the entire demand curve, such as changes in income, tastes and fashions, the price of substitute goods (e.g. tea and coffee), and the price of complementary goods (e.g. smartphones and apps). A shift to the right means more is demanded at every price level; a shift to the left means less.
若干因素可以移动整条需求曲线，例如收入变化、品味和时尚变化、替代品价格（如茶和咖啡）、互补品价格（如智能手机和应用程序）。曲线向右移动意味着在每个价格水平上需求量都增加了；向左移动则意味着减少。
Memory tip: Think of 'TIPS' for factors shifting the demand curve: Tastes, Income, Price of related goods, Size of the market (number of buyers).
记忆技巧： 用 'TIPS' 记忆移动需求曲线的因素：Tastes（品味）、Income（收入）、Price of related goods（相关品价格）、Size of the market（市场规模/买者数量）。
7. Supply | 供给
Supply is the willingness and ability of producers to offer a good or service for sale at a given price over a period of time. The law of supply states that, ceteris paribus, as the price rises, quantity supplied increases, because higher prices give producers an incentive to produce more to earn greater profit.
供给是生产者在给定时间内以某一价格出售商品或服务的意愿和能力。供给定律指出，在其他条件不变的情况下，价格上升，供给量增加，因为更高的价格激励生产者多生产以获取更多利润。
Factors that can shift the supply curve include changes in production costs (such as wages and raw material prices), improvements in technology, taxes and subsidies, and the number of sellers in the market. A rightward shift means producers are willing to supply more at each price.
能够移动供给曲线的因素包括生产成本变动（如工资和原材料价格）、技术进步、税收与补贴，以及市场中的卖家数量。向右移动表示生产者在每个价格水平上都愿意提供更多。
Memory tip: Supply shifters can be recalled with 'PINTS': Productivity (technology), Indirect taxes and subsidies, Number of firms, Technology (again, but works), Supply costs. Simply put, anything that changes how cheap or easy it is to produce will shift supply.
记忆技巧： 供给曲线移动因素可用 'PINTS' 记忆：Productivity（生产率/技术）、Indirect taxes and subsidies（间接税和补贴）、Number of firms（企业数量）、Technology（技术）、Supply costs（供给成本）。简而言之，任何改变生产便宜或容易程度的因素都会移动供给曲线。
8. Market Equilibrium | 市场均衡
Market equilibrium occurs where the quantity demanded equals the quantity supplied at a particular price. This is the 'clearing price' because there is no surplus (excess supply) and no shortage (excess demand). The market is in balance, and there is no tendency for price to change unless an external factor shifts demand or supply.
市场均衡发生在某一价格下需求量等于供给量时。这是“市场出清价格”，因为没有剩余（超额供给）也没有短缺（超额需求）。市场处于平衡状态，除非有外部因素移动需求或供给，否则价格没有变化的趋势。
If the current price is above equilibrium, a surplus occurs and producers may reduce prices to sell excess stock. If the price is below equilibrium, a shortage occurs, and consumers may bid up prices. The price mechanism works like an invisible hand, guiding resources to where they are most wanted.
如果当前价格高于均衡价格，就会出现剩余，生产者可能降价以出售多余库存。如果价格低于均衡价格，就会出现短缺，消费者可能竞相抬价。价格机制就像一只看不见的手，引导资源流向最需要它们的地方。
Memory tip: Picture a seesaw with demand on one side and supply on the other. Equilibrium is when the seesaw is perfectly level — no one is pushed up or down.
记忆技巧： 想象一个跷跷板，一边是需求，另一边是供给。均衡就是跷跷板完全水平时——没有人被抬高或压低。
9. Price Elasticity of Demand | 需求价格弹性
Price elasticity of demand (PED) measures how responsive the quantity demanded is to a change in price. It is calculated using the formula:
需求价格弹性（PED）衡量需求量对价格变动的反应程度。计算公式为：
PED = (% Change in Quantity Demanded) / (% Change in Price)
If PED > 1, demand is elastic — consumers are very responsive to price changes (common with luxury goods). If PED < 1, demand is inelastic — consumers are less responsive (common with necessities like water or electricity). A PED of exactly 1 is called unit elastic.
如果 PED > 1，需求富有弹性——消费者对价格变化非常敏感（常见于奢侈品）。如果 PED < 1，需求缺乏弹性——消费者反应不敏感（常见于水或电等必需品）。PED 正好为1时称为单位弹性。
Businesses use PED to forecast how a price change will affect total revenue. When demand is elastic, a price cut increases total revenue; when inelastic, a price rise increases total revenue. Government policymakers also use elasticity concepts when taxing products like cigarettes, which tend to have inelastic demand.
企业利用 PED 预测价格变动对总收入的影响。需求富有弹性时，降价能增加总收入；需求缺乏弹性时，提价能增加总收入。政府制定政策时也会运用弹性概念，例如对香烟征税，因为香烟需求往往缺乏弹性。
Memory tip: 'Elastic bands stretch a lot with a small pull, just like elastic demand stretches quantity a lot with a small price change.' Inelastic is like a stiff rope — it hardly moves.
记忆技巧： '弹力带轻轻一拉就伸长很多，就像弹性需求对微小的价格变化反应巨大。' 缺乏弹性则像一根硬绳子——几乎不动。
10. Production Possibility Frontier | 生产可能性边界
A Production Possibility Frontier (PPF) shows the maximum possible output combinations of two goods or services an economy can produce with its existing resources and technology, assuming all resources are fully and efficiently employed. It illustrates the trade-offs and opportunity costs facing a country.
生产可能性边界（PPF）展示了一个经济体利用现有资源和技术能生产的两种商品或服务的最大产量组合，假设所有资源都得到充分有效的利用。它说明了一个国家面临的权衡取舍和机会成本。
Points on the curve represent productive efficiency; points inside the curve show inefficiency or underutilisation of resources, and points outside are unattainable with current resources. If the economy invests in new technology or gains more resources, the entire PPF can shift outward, which represents economic growth.
曲线上方的点代表生产效率；曲线内部的点表示资源利用不足或效率低下；曲线外的点则是现有资源下无法达到的。如果经济投资新技术或获得更多资源，整个 PPF 可以向外移动，这代表经济增长。
Memory tip: Think of a PPF as a 'bow of possibility'. The curve looks like a bow, and it pushes outwards when a country 'lets the arrow fly' through innovation.
记忆技巧： 把 PPF 想象成一张“可能性之弓”。曲线呈弓形，当国家通过创新“放箭”时，弓便向外扩张。
11. Economic Systems | 经济体系
An economic system is the way a society organises the production, distribution and consumption of goods and services. The three main types are market economies, command (planned) economies, and mixed economies. They differ in how they answer the three basic economic questions: What to produce? How to produce? For whom to produce?
经济体系是一个社会组织生产、分配和消费商品与服务的方式。三种主要类型是市场经济、指令（计划）经济和混合经济。它们回答三个基本经济问题的角度各不相同：生产什么？如何生产？为谁生产？
In a pure market economy, decisions are driven by private individuals and firms through the price mechanism, with little or no government intervention. A command economy relies on the central government to allocate resources and make all economic decisions. Most real-world economies are mixed, combining market forces with government regulation to correct market failures and provide public goods such as defence and street lighting.
在纯粹市场经济中，决策由私人个体和企业通过价格机制驱动，政府干预极少或没有。指令经济则依赖中央政府来分配资源并做出所有经济决策。大多数现实世界的经济都是混合的，将市场力量与政府监管相结合，以纠正市场失灵并提供国防、路灯等公共物品。
Memory tip: Use the 'Three Wh-words' — What? How? For Whom? Each system answers these questions differently. Practise by identifying which system your own country most resembles.
记忆技巧： 用三个“Wh-词”——What？How？For Whom？每个体系对这些问题回答不同。试着判断你的国家最接近哪种体系来练习。
12. Specialisation and Trade | 专业化与贸易
Specialisation occurs when individuals, firms or countries concentrate on producing a narrow range of goods or services in which they have an advantage. This increases efficiency and productivity. For example, a baker specialises in baking bread, while a tailor specialises in making clothes. They then trade to obtain the other goods they need.
专业化指个人、企业或国家集中生产他们有优势的少量商品或服务。这能提高效率和生产力。例如，面包师专门烤面包，裁缝专门做衣服。然后他们通过贸易获得彼此需要的其他商品。
Trade allows countries to consume beyond their own PPF. By exporting what they produce efficiently and importing what others produce more cheaply, nations can enjoy a higher standard of living. International trade is based on the principle of comparative advantage, which states that even if one country is better at producing everything, both can still gain from trade by specialising according to their lower opportunity cost.
贸易使国家能够消费超出自身生产可能性边界的商品。通过出口自己高效生产的产品、进口别国更便宜生产的产品，各国可以享受更高的生活水平。国际贸易基于比较优势原则，即即使一个国家在生产所有商品上都更出色，两国仍可通过根据较低机会成本进行专业化而从贸易中获益。
Memory tip: Think of the phrase 'Do what you do best, trade for the rest.' Specialisation is about focusing on your strengths; trade turns those strengths into a wider variety of goods.
记忆技巧： 记住这句话：'做你最擅长的，剩下的通过贸易获取。'专业化是专注你的强项；贸易则把这些强项转化为更多样化的商品。
Published by TutorHao | Economics Revision Series | aleveler.com
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