📚 Year 11 CCEA Economics: Quick Memorisation Guide to Key Terminology | CCEA 经济学核心词汇速记指南
Mastering key economic terminology is essential for success in your CCEA Year 11 Economics course. This guide breaks down the most important terms topic by topic and pairs them with memory aids and simple explanations. Use these pairings to build your economic vocabulary quickly and confidently.
掌握关键经济学术语是你在 CCEA 11 年级经济学课程中取得成功的基础。本指南按主题梳理最重要的术语，并配以记忆辅助和简单解释。利用这些双语对照快速、自信地积累你的经济学词汇。
1. Scarcity, Choice & Opportunity Cost | 稀缺性、选择与机会成本
The fundamental economic problem is that resources are limited while human wants are unlimited. This creates scarcity, forcing individuals and societies to make choices. Each choice has an opportunity cost – the value of the next best alternative forgone.
基本经济问题在于资源有限而人类的欲望无限，这就产生了稀缺性，迫使个人和社会做出选择。每一次选择都涉及机会成本——即所放弃的次优选择的价值。
Scarcity: the situation where finite resources are insufficient to satisfy all wants.
稀缺性：有限资源不足以满足所有欲望的情况。
Choice: the decision made between alternatives when scarcity exists.
选择：在存在稀缺性时，在不同替代方案之间做出的决定。
Opportunity cost: the benefit lost from the next best alternative when a choice is made.
机会成本：做出选择时所放弃的次优选择带来的利益。
Memory tip: Think of "SCO" – Scarcity forces Choice, which creates an Opportunity cost.
记忆提示：记住缩写“SCO”——稀缺性(Scarcity)迫使选择(Choice)，选择产生机会成本(Opportunity cost)。
2. Factors of Production & Their Rewards | 生产要素及其报酬
Economists classify resources into four factors of production: land, labour, capital and enterprise. Each factor earns a corresponding reward – rent, wages, interest and profit.
经济学家把资源分为四种生产要素：土地、劳动力、资本和企业家才能。每种要素获得相应的报酬——地租、工资、利息和利润。
Land: natural resources used in production (reward: rent).
土地：生产中所使用的自然资源（报酬：地租）。
Labour: human effort, both physical and mental (reward: wages).
劳动力：人的体力和脑力劳动（报酬：工资）。
Capital: man-made goods used to produce other goods and services (reward: interest).
资本：用于生产其他商品和服务的人造物品（报酬：利息）。
Enterprise: the willingness to take risks and combine the other factors (reward: profit).
企业家才能：承担风险并组合其他要素的意愿（报酬：利润）。
Mnemonic: Use the word CELL – Capital, Enterprise, Land, Labour – to recall all four factors.
助记法：用单词 CELL（细胞）——资本(Capital)、企业家才能(Enterprise)、土地(Land)、劳动力(Labour)——记住全部四种要素。
3. Production Possibility Frontier (PPF) | 生产可能性边界
A PPF shows the maximum combinations of two goods an economy can produce with its existing resources and technology. Points on the curve represent efficient output, while points inside indicate underutilisation of resources.
生产可能性边界（PPF）表示一个经济体利用现有资源和技术所能生产的两种商品的最大组合。曲线上的点代表有效率的生产，曲线内部的点则表示资源未充分利用。
PPF: a curve illustrating the trade-offs and opportunity costs between two products.
PPF：展示两种产品间权衡和机会成本的曲线。
Productive efficiency: producing at the lowest possible cost – any point on the PPF.
生产效率：以尽可能低的成本进行生产——即 PPF 上的任何点。
Economic growth: an outward shift of the PPF caused by more resources or better technology.
经济增长：由于资源增加或技术进步使得 PPF 向外移动。
Memory angle: "P" for Possibility, "P" for Production – the boundary of what is Possible with current Production capacity.
记忆角度：“Possible”与“Production”都以 P 开头——当前生产能力下可能达到的边界。
4. Demand | 需求
Demand refers to the quantity of a good or service consumers are willing and able to buy at various prices over a given period. The law of demand states that, ceteris paribus, as price falls, quantity demanded rises.
需求是指在一定时期内，消费者在不同价格水平上愿意并且能够购买的商品或服务的数量。需求定律指出，在其他条件不变的情况下，价格下降时需求量上升。
Law of Demand: an inverse relationship between price and quantity demanded.
需求定律：价格与需求量之间的反向关系。
Demand curve: a downward-sloping line showing how much consumers will buy at each price.
需求曲线：一条向下倾斜的线，显示消费者在各个价格水平下的购买量。
Movement along the curve: caused by a change in price only.
沿曲线移动：仅由价格变化引起。
Shift of the curve: caused by changes in non-price factors such as income, tastes, or prices of related goods.
曲线移动：由非价格因素的变化引起，如收入、偏好或相关商品价格。
Quick recall: When price goes down, quantity goes up – "P↓ Qd↑".
速记：价格下跌，需求量上升——“P↓ Qd↑”。
5. Supply | 供给
Supply is the quantity of a good or service producers are willing and able to offer for sale at different prices. According to the law of supply, as price increases, quantity supplied increases, ceteris paribus.
供给是指生产者在不同价格水平上愿意并且能够出售的商品或服务的数量。根据供给定律，在其他条件不变时，价格上涨，供给量增加。
Law of Supply: a direct relationship between price and quantity supplied.
供给定律：价格与供给量之间的正向关系。
Supply curve: an upward-sloping line reflecting the profit incentive to produce more at higher prices.
供给曲线：一条向上倾斜的线，反映更高价格刺激生产更多商品的利润动机。
Shift factors: changes in costs of production, technology, taxes, subsidies, or the number of sellers.
移动因素：生产成本、技术、税收、补贴或销售者数量的变化。
Memory tool: Supply Slopes Skyward – both start with "S".
记忆工具：供给曲线(Supply)向上倾斜(Skyward)，两个词都以 S 开头。
6. Price Determination & Market Equilibrium | 价格决定与市场均衡
Market equilibrium occurs where the quantity demanded equals the quantity supplied at a particular price. At this point there is no excess demand or excess supply, and the market clears.
市场均衡出现在某一价格下需求量等于供给量时。此时不存在超额需求或超额供给，市场出清。
Equilibrium price: the price at which plans of consumers and producers match.
均衡价格：消费者和生产者计划相匹配的价格。
Excess demand: a shortage where Qd > Qs, pushing prices up.
超额需求：短缺状态，Qd > Qs，推动价格上涨。
Excess supply: a surplus where Qs > Qd, pushing prices down.
超额供给：过剩状态，Qs > Qd，推动价格下降。
Visual cue: Imagine a pair of scissors – demand and supply are the two blades that meet at the equilibrium point.
视觉联想：想象一把剪刀——需求与供给是两片刀刃，在均衡点交会。
7. Price Elasticity of Demand (PED) | 需求的价格弹性
PED measures the responsiveness of quantity demanded to a change in price. It is calculated as the percentage change in quantity demanded divided by the percentage change in price.
需求的价格弹性（PED）衡量需求量对价格变化的反应程度。它等于需求量变动的百分比除以价格变动的百分比。
PED = %ΔQd ÷ %ΔP
Elastic demand: PED > 1, meaning consumers are very responsive to price changes.
富有弹性：PED > 1，消费者对价格变化非常敏感。
Inelastic demand: PED < 1, meaning consumers are less responsive to price changes.
缺乏弹性：PED < 1，消费者对价格变化不太敏感。
Unitary elasticity: PED = 1, total revenue stays constant when price changes.
单位弹性：PED = 1，价格变化时总收益不变。
Memory phrase: "Ed's number tells the story" – a higher number means a more dramatic consumer response.
记忆短语：“Ed 的数字说明一切”——数值越大表示消费者反应越强烈。
8. Price Elasticity of Supply (PES) | 供给的价格弹性
PES measures how much quantity supplied changes in response to a price change. The formula is similar to PED but uses quantity supplied.
供给的价格弹性（PES）衡量价格变化时供给量的变化程度。公式与 PED 类似，但使用供给量。
PES = %ΔQs ÷ %ΔP
Elastic supply: PES > 1, producers can easily increase output when prices rise.
供给富有弹性：PES > 1，价格上涨时生产者能够轻松增加产量。
Inelastic supply: PES < 1, output is difficult to expand quickly (e.g., agricultural products).
供给缺乏弹性：PES < 1，难以迅速扩大产量（例如农产品）。
Determinants: time period, availability of spare capacity, and ease of storage.
决定因素：时间周期、剩余产能的可用性以及储存的难易程度。
Quick link: Think "S for supply, S for speed" – how fast can producers react?
快速联想：记住“S 代表供给，也代表速度(speed)”——生产者能多快做出反应？
9. Market Failure & Externalities | 市场失灵与外部性
Market failure occurs when the free market does not allocate resources efficiently. Externalities are costs or benefits that affect third parties not involved in the transaction.
市场失灵是指自由市场未能有效配置资源。外部性是指影响到未参与交易的第三方的成本或收益。
Negative externality: a cost imposed on others (e.g., pollution). The social cost exceeds private cost.
负外部性：施加于他人的成本（如污染）。社会成本大于私人成本。
Positive externality: a benefit enjoyed by others (e.g., education). The social benefit exceeds private benefit.
正外部性：他人享受到的利益（如教育）。社会收益大于私人收益。
Public good: non-excludable and non-rival (e.g., street lighting), often under-provided by markets.
公共品：具有非排他性和非竞争性（如路灯），市场往往提供不足。
Merit good: a good with greater social benefits than consumers realise (e.g., vaccinations).
优值品：社会收益大于消费者自身认知的商品（如疫苗接种）。
Memory pattern: "Free markets are not always flawless" – F for failure, F for free riders in public goods.
记忆模式：“自由市场并非永远完美”——F 既代表失灵(Failure)，也代表公共品的搭便车者(Free rider)。
10. Government Intervention | 政府干预
Governments intervene in markets to correct market failures and achieve a fairer distribution of income. Common tools include taxation, subsidies, price controls and regulation.
政府干预市场以纠正市场失灵、实现更公平的收入分配。常见手段包括税收、补贴、价格管制和法规。
Indirect tax: a tax on spending (e.g., VAT) that can reduce negative externalities by raising price.
间接税：对消费征税（如增值税），可通过提高价格减少负外部性。
Subsidy: a payment to firms that lowers production costs and encourages greater output of merit goods.
补贴：支付给企业的款项，可降低生产成本并鼓励生产和消费优值品。
Maximum price: a price ceiling set below equilibrium to keep essential goods affordable.
最高限价：设定在均衡价格之下的价格上限，使必需品保持平价。
Minimum price: a price floor set above equilibrium to protect producers (e.g., minimum wage for labour).
最低限价：设定在均衡价格之上的价格底线，以保护生产者（如劳动力的最低工资）。
Regulation: rules that limit harmful activities, such as emission standards.
法规：限制有害活动的规则，如排放标准。
Recall trick: "T-S-P-R" – Tax, Subsidy, Price controls, Regulation.
记忆窍门：“T-S-P-R”——税收(Tax)、补贴(Subsidy)、价格管制(Price controls)、法规(Regulation)。
11. Macroeconomic Objectives & Indicators | 宏观经济目标与指标
Governments aim for steady economic growth, low unemployment, price stability and a healthy balance of payments. Key indicators measure how well these objectives are being met.
政府追求稳定的经济增长、低失业率、物价稳定和健康的国际收支。关键指标用于衡量这些目标的实现程度。
Economic growth: an increase in the real GDP of an economy over time, indicating more goods and services produced.
经济增长：一国实际 GDP 在一段时间内的增长，表明生产的商品和服务增多。
Unemployment rate: the percentage of the labour force that is actively seeking work but
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