📚 Year 7 WJEC Economics: Core Knowledge Review | Year 7 WJEC 经济：核心知识点梳理
Welcome to your Year 7 WJEC Economics journey. This article brings together the essential ideas you will explore in class, from scarcity and choice to how money works. Mastering these concepts now will build a strong foundation for your future studies in economics, business, and everyday decision-making.
欢迎开启 Year 7 WJEC 经济学的学习之旅。本文梳理了课堂上你将探究的核心概念，从稀缺与选择到货币如何运作。现在掌握这些知识，将为你未来的经济学、商科学习以及日常决策打下坚实基础。
1. What is Economics? | 什么是经济学？
Economics is the study of how people use limited resources to satisfy their unlimited wants. It looks at the choices individuals, businesses, and governments make every day. Understanding economics helps us explain why things cost money, why we cannot have everything we desire, and how to make better decisions with what we have.
经济学是研究人们如何利用有限资源来满足无限需求的一门学科。它关注个人、企业和政府每天做出的选择。理解经济学能帮助我们解释为什么物品需要花钱购买，为什么我们不能拥有想要的一切，以及如何利用现有资源做出更好的决定。
The word ‘economics’ comes from a Greek word meaning ‘management of a household’. Just as a family must decide how to spend its income on food, housing, and entertainment, a society must decide how to use its land, labour, and machines.
“经济学”一词源自希腊语，意为“家庭管理”。就像一个家庭必须决定如何把收入花在食物、住房和娱乐上，整个社会也必须决定如何利用土地、劳动力和机器。
Economists often divide the subject into microeconomics, which looks at small units like households and firms, and macroeconomics, which studies the economy as a whole. In Year 7, we focus on the building blocks that apply to your daily life.
经济学家通常将这门学科分为微观经济学和宏观经济学。微观经济学研究家庭和企业等小单位，宏观经济学则研究整体经济。在七年级，我们重点关注与你日常生活息息相关的基础模块。
2. Scarcity and the Basic Economic Problem | 稀缺性与基本经济问题
Scarcity is the central idea in economics. It means that resources are limited while human wants are unlimited. Because of scarcity, we cannot produce enough goods and services to satisfy everyone’s desires completely. This forces us to make choices.
稀缺性是经济学的核心思想。它意味着资源有限，而人类的需求是无限的。由于稀缺性的存在，我们无法生产出足够的商品和服务来完全满足每个人的愿望。这迫使我们做出选择。
The basic economic problem can be summarised by three questions: What to produce? How to produce? For whom to produce? Every society, from a small village to a large country, must answer these questions.
基本经济问题可以概括为三个问题：生产什么？如何生产？为谁生产？从一个小村庄到一个大国，每个社会都必须回答这些问题。
| English Term | 中文术语 | Simple Explanation (English) | 简单解释 (中文) |
|---|---|---|---|
| Scarcity | 稀缺性 | Not enough resources to meet all wants | 没有足够的资源来满足所有需求 |
| Needs | 必需品 | Things required for survival, like water and food | 生存所必需的物品，如水与食物 |
| Wants | 需求/欲望 | Things we would like to have but are not essential, such as a video game | 我们想要但并非生存必需的物品，例如电子游戏 |
Think about a classroom with only five pencils but ten students who need them. That is scarcity. The teacher must decide how to share the pencils (how to produce the writing work) and who gets to use them first (for whom to produce). Economics gives us tools to think about these decisions fairly.
想象一间教室只有五支铅笔，却有十名学生需要使用。这就是稀缺。老师必须决定如何分享铅笔（如何完成书写任务）以及谁先用（为谁生产）。经济学为我们提供了工具，以便公平地思考这些决策。
3. Opportunity Cost | 机会成本
Whenever you make a choice, you give up the next best alternative. This is called the opportunity cost. It is not simply the money you spend – it is the value of the most desirable option you did not choose.
每当你做出选择时，你都会放弃次优的替代方案。这被称为机会成本。它不仅是你花掉的钱，而是你没有选择的那个最理想选项的价值。
For example, if you have £10 and decide to buy a cinema ticket instead of a new book, the opportunity cost is the enjoyment and knowledge you would have gained from reading that book. If you spend an hour playing football instead of studying, the opportunity cost is the improvement in your grades you might have achieved.
例如，如果你有10英镑，决定买一张电影票而不是一本新书，那么机会成本就是你可能从阅读那本书中获得的乐趣和知识。如果你花一小时踢足球而不是学习，机会成本就是你可能取得的学业进步。
Understanding opportunity cost helps us weigh benefits before deciding. It reminds us that resources – time, money, and energy – are limited, so every ‘yes’ to one thing is a ‘no’ to something else.
理解机会成本有助于我们在做决定前权衡收益。它提醒我们，资源——时间、金钱和精力——是有限的，因此对某件事说“好”就是对另一件事说“不”。
Opportunity Cost = Value of Next Best Alternative Forgotten
机会成本 = 所放弃的次优替代方案的价值
4. Goods and Services | 商品与服务
In economics, we distinguish between goods and services. Goods are physical items we can touch, such as a smartphone, a loaf of bread, or a pair of shoes. Services are intangible activities performed for us, such as a haircut, a bus ride, or a teacher’s lesson.
在经济学中，我们区分商品与服务。商品是我们可以触摸到的有形物品，例如智能手机、一条面包或一双鞋。服务是为我们提供的无形活动，比如理发、乘坐公交车或老师授课。
Both goods and services are produced using economic resources. Land provides natural materials, labour provides human effort, capital includes machines and tools, and enterprise brings everything together to create value. These four factors of production are the inputs needed to make any output.
商品和服务都是利用经济资源生产出来的。土地提供天然材料，劳动力提供人力努力，资本包括机器与工具，而企业家精神将这一切结合起来创造价值。这四种生产要素是生产任何产出所需的投入。
| Factor (English) | 要素 (中文) | Example | 示例 |
|---|---|---|---|
| Land | 土地 | Forest, oil, river | 森林、石油、河流 |
| Labour | 劳动力 | Teacher, builder, nurse | 老师、建筑工人、护士 |
| Capital | 资本 | Factory machines, computers | 工厂机器、电脑 |
| Enterprise | 企业家精神 | An entrepreneur starting a new shop | 开设新店铺的企业家 |
Consumers demand goods and services to meet their needs and wants. Producers supply them to earn income. The interaction between consumers and producers drives the whole economy.
消费者需要商品和服务来满足自己的需求与欲望。生产者提供这些商品和服务以赚取收入。消费者与生产者之间的互动驱动着整个经济。
5. Demand and Supply | 需求与供给
Demand refers to the quantity of a good or service that consumers are willing and able to buy at different prices. Generally, the lower the price, the greater the quantity demanded – this is the law of demand.
需求是指在不同价格水平下，消费者愿意并且能够购买的商品或服务的数量。通常，价格越低，需求量越大——这就是需求定律。
Supply is the quantity that producers are willing and able to offer for sale. The higher the price, the more firms are willing to supply – this is the law of supply. When price rises, producing becomes more profitable, encouraging greater output.
供给是指生产者愿意并且能够出售的数量。价格越高，企业愿意供给的数量就越多——这就是供给定律。当价格上涨时，生产变得更有利可图，从而鼓励增加产出。
The price where demand equals supply is called the equilibrium price. At this point, the market clears, meaning every buyer finds a seller and there is no wasted product. Real-world markets constantly move towards this balance, though outside factors can shift both demand and supply.
需求与供给相等的价格被称为均衡价格。在这一点上，市场出清，即每一个买家都能找到卖家，没有产品浪费。现实中的市场不断朝着这个平衡点移动，尽管外部因素会导致需求和供给发生变动。
Imagine a pop-up lemonade stand on a hot day. If the price is low, many students queue up (high demand), but the seller may not want to make much lemonade (low supply). If the price is very high, only a few students buy, but the seller is eager to produce more. The stand eventually finds a price that works for both.
想象一个在炎热天气下的临时柠檬水小摊。如果价格很低，许多学生会排队购买（高需求），但卖家可能不愿意制作太多柠檬水（低供给）。如果你格很高，只有少数学生购买，但卖家则乐于生产更多。最终，小摊会找到一个对双方都合适的价格。
6. Markets and Trade | 市场与贸易
A market is any place or system where buyers and sellers come together to exchange goods, services, or resources. It does not have to be a physical location – online shops and stock exchanges are markets too.
市场是买方和卖方聚集在一起交换商品、服务或资源的任何场所或系统。它不一定是一个实体地点——网店和证券交易所也是市场。
Trade occurs when people swap what they have for what they want. In early societies, barter was used – for example, exchanging two chickens for a sack of grain. However, barter can be difficult because you must find someone who wants exactly what you offer. Money solved this problem by acting as a common medium of exchange.
当人们用自己拥有的东西去交换想要的东西时，贸易就发生了。在早期社会，人们采用以物易物的方式——例如，用两只鸡换一袋谷物。然而，以物易物可能很困难，因为你必须找到一个恰好需要你提供之物的人。货币作为通用的交易媒介解决了这个问题。
Specialisation makes trade even more powerful. When countries or people focus on producing a narrow range of goods they are good at making, productivity increases. They then trade their surplus output for other products, raising living standards for everyone.
专业化使贸易变得更加强大。当国家或个人专注于生产他们擅长的一小部分商品时，生产率就会提高。然后他们用多余的产出交换其他产品，从而提高每个人的生活水平。
7. Money and Banking | 货币与银行
Money serves four main functions. It is a medium of exchange, allowing us to buy items without barter. It is a unit of account, giving a common measure for prices and values. It is a store of value, so we can save it for future use. Finally, it acts as a standard of deferred payment, enabling borrowing and lending.
货币具有四项主要职能。它是交易媒介，使我们无需以物易物就能购买物品。它是计价单位，提供了一个衡量价格和价值的通用标准。它是价值储藏手段，因此我们可以将其储存起来以备将来使用。最后，它还充当了延期支付标准，使借贷成为可能。
Banks play a crucial role by keeping money safe, offering current accounts for day-to-day spending and savings accounts that pay interest. When you deposit money, the bank can lend it to others, earning interest itself. This flow of savings into investment fuels economic growth.
银行发挥着至关重要的作用，它们保管资金，提供用于日常消费的活期账户和支付利息的储蓄账户。当你存入钱款时，银行可以将其贷给他人，本身赚取利息。这种储蓄转化为投资的流动为经济增长提供了动力。
In the UK, money consists of notes and coins (cash) as well as digital balances in bank accounts. The Bank of England oversees the nation’s currency and works to keep inflation – the general rise in prices – low and stable.
在英国，货币包括纸币和硬币（现金）以及银行账户中的数字余额。英格兰银行负责监管国家货币，并努力维持低而稳定的通货膨胀——即物价的普遍上涨。
8. Budgeting and Personal Finance | 预算与个人理财
A budget is a plan for how to spend and save money over a set period. Creating a budget helps individuals ensure that their spending does not exceed their income. It is a powerful tool for avoiding debt and reaching financial goals.
预算是在一段特定时间内如何花钱和省钱的计划。制定预算有助于个人确保支出不超过收入。它是避免债务和实现财务目标的有力工具。
Personal finance covers income, spending, saving, and borrowing. Common sources of income for young people include pocket money, gifts, and earnings from part-time jobs. Understanding the difference between regular expenses (such as a phone contract) and one-off purchases (like a concert ticket) helps in planning.
个人理财涵盖收入、支出、储蓄和借贷。年轻人常见的收入来源包括零花钱、礼物和兼职工作收入。理解经常性开支（如手机套餐）与一次性购买（如音乐会门票）之间的区别，有助于进行规划。
Saving even a small amount regularly can build a financial cushion. The idea of ‘paying yourself first’ means putting money into savings before spending on wants. This habit, started early, can grow through the power of compound interest, where interest earns interest over time.
即使定期储蓄少量金额也能建立财务缓冲。“先付钱给自己”的理念意味着在把钱花在欲望之前，先将钱存入储蓄。尽早养成这一习惯，可以利用复利的力量让财富增长——即利息随时间的推移也产生利息。
Income – Spending = Savings
收入 – 支出 = 储蓄
9. Economic Agents | 经济参与者
Economics studies the behaviour of three main groups, called economic agents: households, firms, and the government. Households own the factors of production (land, labour, capital, enterprise) and provide them to firms. In return, they receive income like wages, rent, interest, and profit.
经济学研究三大主要群体的行为，它们被称为经济参与者：家庭、企业和政府。家庭拥有生产要素（土地、劳动力、资本、企业家精神），并将其提供给企业。作为回报，家庭获得工资、租金、利息和利润等收入。
Firms use the factors of production to create goods and services. They aim to make a profit by selling their output at a price higher than their costs. Competition among firms encourages innovation and keeps prices reasonable for consumers.
企业利用生产要素来创造商品和服务。它们的目标是以高于成本的价格销售产出，从而获得利润。企业之间的竞争鼓励创新，并使消费者支付的价格保持在合理水平。
The government collects taxes from households and firms and uses the revenue to provide public services like schools, hospitals, and roads. It also creates rules and regulations to ensure the economy works fairly and to support those in need.
政府向家庭和企业征税，并用这些收入提供学校、医院、道路等公共服务。它还制定规则和法规，确保经济公平运行，并帮助有需要的人。
These three groups interact in a circular flow: households supply resources to firms, firms pay wages and create goods, and the government redistributes income and provides essential services.
这三类群体在一个循环流程中互动：家庭向企业提供资源，企业支付工资并生产商品，政府进行收入再分配并提供必要服务。
10. The Economy and You | 经济与你
Every time you choose a snack, save a birthday gift, or decide how to spend your Saturday afternoon, you are making economic decisions. Economics is not just about stock markets and governments – it is about the trade-offs you face every day.
每当你选择零食、储蓄生日礼物或决定如何度过周六下午时，你都在做出经济决策。经济学不仅仅是关于股市和政府——它关乎你每天面对的各种权衡取舍。
Being economically literate means you can explain why prices rise, why some jobs pay more than others, and how your own small choices connect to a larger system. It empowers you to ask important questions: Is this the best use of my time? What will I have to give up?
具备经济素养意味着你能解释为何物价上涨、为什么某些工作的报酬高于其他工作，以及你自己的细小选择如何与更大的体系相连。它赋予你提出重要问题的能力：这是否是对我时间的最佳利用？我会因此放弃什么？
As you continue your studies, you will explore more complex topics such as inflation, economic growth, and international trade. But the core ideas – scarcity, choice, opportunity cost, and the interplay of demand and supply – will always remain the foundation.
随着学习的继续，你将探索更复杂的主题，如通货膨胀、经济增长和国际贸易。但核心思想——稀缺性、选择、机会成本以及需求与供给的相互作用——将始终是基础所在。
Economics is a lens through which you see the world clearly. By mastering the basics now, you are preparing yourself not only for exams but for a lifetime of smarter decisions.
经济学是让你看清世界的一个透镜。现在掌握基础知识，你不仅是在为考试做准备，也是在为一生的明智决策做准备。
Published by TutorHao | Economics Revision Series | aleveler.com
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