📚 Year 10 WJEC Economics: Key Term Memory Hacks | WJEC 经济学核心术语速记指南
Struggling to recall the precise definitions for “opportunity cost” or “price elasticity of demand” under exam pressure? This guide breaks down the essential Year 10 WJEC Economics terminology into bite-sized, memorable chunks. Each term is explained clearly, paired with its Chinese equivalent, and reinforced with a clever memory hack so you can walk into your exam confident and prepared.
在考试压力下难以准确回忆”机会成本”或”需求价格弹性”的定义？本指南将 WJEC 经济学核心术语分解为易于记忆的小块。每个术语都有清晰的解释，配以中文翻译，并通过巧妙的速记技巧加以巩固，让你自信地走进考场。
1. The Basic Economic Problem | 基本经济问题
Scarcity: The fundamental economic problem arising from limited resources and seemingly unlimited human wants. Scarcity forces individuals and societies to make choices about how to allocate resources.
稀缺性：由有限资源与看似无限的人类欲望引起的基本经济问题。稀缺性迫使个人和社会对如何分配资源做出选择。
Choice: The act of selecting among available alternatives because resources are scarce. Every choice involves trade-offs.
选择：由于资源稀缺而在可用替代方案中进行取舍的行为。每一次选择都涉及权衡。
Opportunity Cost: The value of the next best alternative forgone when a choice is made. It represents the true cost of any economic decision.
机会成本：做出选择时所放弃的次优替代方案的价值。它代表了任何经济决策的真实成本。
Economic Goods vs Free Goods: Economic goods are scarce and command a price (e.g., smartphones, clothing); free goods are abundant and have no opportunity cost (e.g., air, sunlight).
经济物品与免费物品：经济物品是稀缺且有价格的（如智能手机、服装）；免费物品是充足的且没有机会成本（如空气、阳光）。
Memory Hack – “SCaRe”: Scarcity → Choice → Resources → opportunity cost. Remember that every choice you make has a hidden cost: the next best thing you gave up.
速记法 – “SCaRe”：稀缺性 → 选择 → 资源 → 机会成本。记住，你做的每个选择都有隐性成本：你放弃的次优选项。
2. Factors of Production & Specialisation | 生产要素与专业化
Factors of Production: The inputs used to produce goods and services, commonly grouped as CELL: Capital (man-made aids for production), Enterprise (the risk-taking ability to combine other factors), Land (natural resources), and Labour (human effort).
生产要素：用于生产商品和服务的投入，通常以 CELL 记忆：资本（人造生产资料）、企业精神（承担风险组合其他要素的能力）、土地（自然资源）和劳动（人力付出）。
Specialisation: When individuals, firms, or countries concentrate on producing a limited range of goods or services where they have a comparative advantage. It boosts productivity but can increase interdependence.
专业化：个人、企业或国家集中生产其具有比较优势的有限范围的商品或服务。它能提高生产率，但可能增加相互依赖性。
Division of Labour: Breaking a production process into smaller, repetitive tasks each performed by different workers. It raises efficiency but may cause worker boredom.
劳动分工：将生产过程分解为更小、重复的任务，由不同工人执行。它提高效率但可能导致工人厌倦。
Memory Hack – “CELL Me Later”: Capital, Enterprise, Land, Labour. Specialisation is like a relay race: each runner does one leg perfectly, and together they finish faster.
速记法 – “CELL 之后再叫我”：资本、企业精神、土地、劳动。专业化就像接力赛：每个跑者完美地完成一棒，组合起来就能更快冲线。
3. Demand: Law, Movements & Shifts | 需求：定律、沿曲线移动与曲线移动
Demand: The quantity of a good or service that consumers are willing and able to purchase at various prices during a given time period.
需求：在特定时期内，消费者愿意且有能力在不同价格水平下购买的商品或服务的数量。
Law of Demand: As the price of a good rises, the quantity demanded falls (and vice versa), ceteris paribus – a classic inverse relationship.
需求定律：在其他条件不变的情况下，商品价格上升，需求量下降（反之亦然）——一种典型的反向关系。
Movement along the demand curve: Caused solely by a change in the good’s own price. A contraction is a move up the curve (price rises, Qd falls); an extension is a move down the curve (price falls, Qd rises).
沿需求曲线移动：仅由商品自身价格变化引起。收缩是沿曲线向上移动（价格上升，需求量减少）；扩张是沿曲线向下移动（价格下降，需求量增加）。
Shift of the demand curve: Caused by non-price determinants. Use “PASIFIC”: Population, Advertising, Substitutes’ prices, Income, Fashion/tastes, Interest rates, Complements’ prices. A rightward shift means more demanded at each price; leftward, less.
需求曲线的移动：由非价格因素引起。使用 “PASIFIC” 记忆法：人口、广告、替代品价格、收入、时尚/偏好、利率、互补品价格。右移表示每个价格下需求量增加；左移表示减少。
Memory Hack – “PASIFIC Twin”: Imagine twin PASIFIC drivers shifting the curve right or left. Normal goods see demand rise when income rises; inferior goods (e.g., supermarket own-brands) see demand fall as income rises.
速记法 – “PASIFIC 双胞胎”：想象一对 PASIFIC 司机让曲线左右移动。正常商品收入增加时需求上升；低档商品（如超市自有品牌）收入增加时需求下降。
4. Supply: Law, Movements & Shifts | 供给：定律、沿曲线移动与曲线移动
Supply: The quantity of a good or service that producers are willing and able to offer for sale at various prices over a given period.
供给：在特定时期内，生产者愿意且有能力在不同价格水平下提供出售的商品或服务的数量。
Law of Supply: As the price of a good rises, the quantity supplied expands (and vice versa), ceteris paribus – a direct positive relationship.
供给定律：在其他条件不变的情况下，商品价格上升，供给量增加（反之亦然）——一种直接的正向关系。
Movement along the supply curve: Caused only by a change in the good’s own price, producing an expansion or contraction of supply.
沿供给曲线移动：仅由商品自身价格变化引起，导致供给量扩张或收缩。
Shift of the supply curve: Caused by changes in costs of production. Key shifters: “PINTS” – Productivity, Input prices (cost of raw materials/wages), Number of suppliers, Technology, Subsidies (and indirect taxes). Lower costs shift supply right; higher costs shift it left.
供给曲线的移动：由生产成本变化引起。关键移动因素：”PINTS”——生产率、投入价格（原材料/工资成本）、供应商数量、技术、补贴（和间接税）。成本降低供给曲线右移；成本升高左移。
Memory Hack – “PINTS of Supply”: Think of a pub pulling PINTS – more pints (supply) when costs fall. A new technology is like a faster tap; a tax is like a leaky barrel.
速记法 – “PINTS 供酒”：想象一家酒吧提供品脱啤酒——成本下降时供给（酒）增加。新技术就像更快的龙头；税收就像漏水的桶。
5. Price Mechanism & Market Equilibrium | 价格机制与市场均衡
Equilibrium Price (Market-Clearing Price): The price where quantity demanded equals quantity supplied. There is no tendency for change at this point.
均衡价格（市场出清价格）：需求量等于供给量时的价格。此时没有变动的趋势。
Excess Demand (Shortage): Occurs when price is set below equilibrium; quantity demanded exceeds quantity supplied, creating upward pressure on price.
超额需求（短缺）：价格设定在均衡价格之下时发生；需求量超过供给量，对价格产生上升压力。
Excess Supply (Surplus): Occurs when price is set above equilibrium; quantity supplied exceeds quantity demanded, pushing price down.
超额供给（过剩）：价格设定在均衡价格之上时发生；供给量超过需求量，推动价格下跌。
Functions of the Price Mechanism: Signalling (prices communicate information about market conditions), Incentive (higher prices encourage more supply, lower prices encourage more demand), and Rationing (scarce resources are allocated to those willing and able to pay).
价格机制的功能：信号功能（价格传达市场状况信息）、激励功能（高价激励供给，低价刺激需求）和配给功能（稀缺资源分配给愿意并能够支付的人）。
Memory Hack – “SIR Ration”: Signalling, Incentive, Rationing. Picture a knight (Sir Ration) using price signals to direct traffic.
速记法 – “SIR Ration 骑士”：信号、激励、配给。想象一位骑士（Sir Ration）用价格信号指挥交通。
6. Price Elasticity of Demand (PED) | 需求价格弹性（PED）
Price Elasticity of Demand (PED): Measures the responsiveness of quantity demanded to a change in price. Formula: PED = %ΔQd ÷ %ΔP. PED > 1 = elastic (responsive), PED < 1 = inelastic (unresponsive), PED = 1 = unitary elastic.
需求价格弹性（PED）：衡量需求量对价格变化的反应程度。公式：PED = %ΔQd ÷ %ΔP。PED > 1 富有弹性（反应灵敏），PED < 1 缺乏弹性（反应迟钝），PED = 1 单位弹性。
Key Factors Determining PED: Availability of close substitutes (more substitutes → more elastic), necessity vs luxury (necessities tend to be inelastic), proportion of income spent (small share → inelastic), and time period (longer time → more elastic).
决定PED的关键因素：相近替代品的可用性（替代品越多→弹性越大）、必需品与奢侈品（必需品倾向缺乏弹性）、占收入支出的比例（占比小→缺乏弹性）以及时间跨度（时间越长→弹性越大）。
PED and
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