📚 Year 7 Edexcel Economics: Core Knowledge Review | Year 7 Edexcel 经济：核心知识点梳理
Economics is the study of how people make choices when they have limited resources. In Year 7, you start exploring the basic ideas that explain how individuals, businesses and governments decide what to produce, how to produce it and who will get what is made. This article pulls together the most important concepts from the Edexcel Year 7 syllabus to help you build a strong foundation.
经济学研究人们在资源有限时如何做出选择。在七年级，你开始探索一些基础理念，这些理念解释了个人、企业和政府如何决定生产什么、如何生产以及谁将获得产品。本文梳理了 Edexcel 七年级教学大纲中最核心的知识点，帮助你打下扎实的基础。
1. What is Economics? | 经济学是什么？
Economics is the social science that looks at how people use scarce resources to satisfy their unlimited wants. It is not just about money – it covers any situation where a decision has to be made because we cannot have everything we desire. Studying economics helps you understand trade-offs, incentives and the consequences of choices in everyday life.
经济学是一门研究人们如何利用稀缺资源来满足无限欲望的社会科学。它不只关于金钱——它涵盖任何由于我们不能拥有一切而必须做出决定的场景。学习经济学有助于你理解日常生活中的权衡、激励以及选择的后果。
2. Scarcity and Choice | 稀缺性与选择
Scarcity means that there are not enough resources to meet all of our needs and wants. Because resources such as time, money and raw materials are limited, individuals, firms and governments must choose how to use them. Every choice involves giving something up, which is why scarcity forces us to consider what is most important.
稀缺性意味着没有足够的资源来满足我们所有的需要和欲望。由于时间、金钱和原材料等资源是有限的，个人、企业和政府必须选择如何使用它们。每一个选择都涉及放弃某些东西，这就是为什么稀缺性迫使我们考虑什么是最重要的。
At its heart, economics is all about making choices under conditions of scarcity. The fundamental economic problem – ‘unlimited wants but limited resources’ – affects every society on the planet. Understanding this problem helps you see why people work, save and plan for the future.
从根本上说，经济学的核心就是在稀缺条件下做出选择。基本经济问题——“无限的欲望但有有限的资源”——影响着地球上的每一个社会。理解这个问题有助于你明白为什么人们要工作、储蓄和规划未来。
3. Needs and Wants | 需要与欲望
Needs are things that people must have to survive, such as food, water, shelter and clothing. Wants, on the other hand, are things that people would like to have but are not essential for survival, such as video games, the latest smartphone or a holiday abroad. Economics helps us distinguish between the two and decide how to prioritise spending.
需要是人们为了生存所必须拥有的东西，例如食物、水、住所和衣服。而欲望则是人们想要但并非生存必需品的东西，比如电子游戏、最新款智能手机或出国度假。经济学帮助我们区分这两者，并决定如何安排支出的优先级。
4. Opportunity Cost | 机会成本
Opportunity cost is the value of the next best alternative that you give up when you make a choice. If a student spends an hour watching television instead of revising, the opportunity cost is the benefit they would have gained from studying. This concept reminds us that every decision has a hidden cost, even when no money is spent.
机会成本是指当你做出一个选择时，你所放弃的次优替代选项的价值。如果一名学生花一小时看电视而不是复习，机会成本就是他们通过学习本可获得的收益。这个概念提醒我们，每个决定都有隐藏成本，即使没有花钱。
Recognising opportunity cost helps people and businesses make better decisions. When a firm decides to use its factory to produce trainers instead of school bags, the opportunity cost is the profit it could have earned from school bags. Thinking about what is sacrificed reveals the true cost of any action.
认识到机会成本有助于个人和企业做出更好的决策。当一家企业决定利用工厂生产运动鞋而不是书包时，机会成本就是它本可从书包中赚取的利润。思考被牺牲的东西揭示了任何行为的真实成本。
5. Factors of Production | 生产要素
To produce goods and services, four key resources are needed. These are called the factors of production: land (natural resources), labour (human effort), capital (man-made tools and machinery) and enterprise (the ability to combine the other factors and take risks). Each factor earns a reward: rent, wages, interest and profit.
为了生产商品和服务，需要四种关键资源。这些被称为生产要素：土地（自然资源）、劳动（人力努力）、资本（人造工具和机器）以及企业家才能（组合其他要素并承担风险的能力）。每一种要素都获得回报：地租、工资、利息和利润。
Even in a simple school bake sale, you can spot the factors of production. Ingredients like flour and eggs are land, the baking effort is labour, the oven is capital and the student who organises the sale and takes the risk of not selling everything is the entrepreneur. This framework helps you analyse any production activity.
即使是在简单的学校烘焙义卖中，你也能发现生产要素。面粉和鸡蛋等原料是土地，烘焙过程是劳动，烤箱是资本，而组织义卖并承担卖不完风险的那个学生就是企业家。这个框架帮助你分析任何生产活动。
6. Economic Agents | 经济主体
Economies are made up of three main groups, often called economic agents: households, firms and the government. Households consume goods and services and provide labour. Firms produce goods and services and hire workers. The government sets rules, collects taxes and provides public services such as education and defence.
经济体由三个主要群体组成，通常称为经济主体：家庭、企业和政府。家庭消费商品和服务并提供劳动力。企业生产商品和服务并雇佣工人。政府制定规则、征税并提供教育和国防等公共服务。
These three groups interact continuously. Households pay taxes to the government, buy products from firms and receive wages in return for work. Firms sell to households and the government, and they invest in new capital. Seeing these interactions helps you picture how the whole economy fits together.
这三个群体持续互动。家庭向政府纳税，从企业购买产品，并通过工作获得工资。企业向家庭和政府出售产品，并投资新的资本。看清这些互动有助于你想象整个经济如何连接在一起。
7. Introduction to Demand | 需求入门
Demand is the quantity of a good or service that consumers are willing and able to buy at different prices. The law of demand states that as the price of a product rises, the quantity demanded usually falls, and as price falls, quantity demanded rises – this is called an inverse relationship. For example, if the price of a cinema ticket drops, more people will want to go to the cinema.
需求是消费者在不同价格下愿意并且能够购买的商品或服务数量。需求定律指出，当产品价格上升时，需求量通常会下降；当价格下降时，需求量会上升——这被称为反向关系。例如，如果电影票价格下降，就会有更多人想去看电影。
Several factors can shift demand besides price, such as changes in income, tastes or the price of related goods. When a particular toy becomes popular, demand increases and the demand curve shifts to the right. Understanding demand is essential for businesses setting prices and planning production.
除了价格以外，还有其他几个因素可以使需求发生移动，比如收入、品味或相关商品价格的改变。当某个玩具变得流行时，需求增加，需求曲线向右移动。理解需求对企业定价和规划生产至关重要。
8. Introduction to Supply | 供给入门
Supply refers to the amount of a good or service that producers are willing and able to offer for sale at different prices. The law of supply says that when the price rises, the quantity supplied usually increases because producers can earn more profit. If the selling price of handmade bracelets goes up, more students might be willing to make and sell them.
供给是指生产者在不同价格下愿意并且能够提供销售的商品或服务数量。供给定律指出，当价格上升时，供给量通常会增加，因为生产者可以获得更多利润。如果手工手链的售价上升，就会有更多学生愿意制作并销售它们。
Supply can also be affected by factors such as the cost of raw materials, technology and the number of sellers. A poor harvest might reduce the supply of strawberries and shift the supply curve to the left. Grasping supply helps explain why some items are cheaper in season and why shortages can occur.
供给也会受到原材料成本、技术和卖方数量等因素的影响。收成不好可能会减少草莓的供给，使供给曲线向左移动。把握供给有助于解释为什么某些应季商品更便宜，以及为什么会出现短缺。
9. Markets and Prices | 市场与价格
A market is anywhere buyers and sellers come together to exchange goods or services. This can be a physical place like a high street shop or an online platform. The interaction of demand and supply in a market determines the equilibrium price – the point where the quantity consumers are willing to buy exactly matches the quantity producers want to sell.
市场是买卖双方聚集在一起交换商品或服务的任何地方。它可以是像高街商店这样的实体场所，也可以是线上平台。市场上需求与供给的相互作用决定了均衡价格——即消费者愿意购买的数量恰好等于生产者想要出售的数量的点。
If the price is set too high, there will be excess supply (a surplus); if it is set too low, there will be excess demand (a shortage). Prices adjust to bring markets back toward equilibrium. This movement shows how markets allocate resources without any single person being in charge.
如果价格定得太高，就会出现超额供给（过剩）；如果定得太低，就会出现超额需求（短缺）。价格会调整，将市场带回均衡状态。这一运动展示了市场如何在没有任何人指挥的情况下配置资源。
10. Money and Its Functions | 货币及其功能
Money is anything widely accepted as a means of payment. It performs three main functions: a medium of exchange – it allows people to trade without bartering; a unit of account – it provides a way to measure and compare the value of goods; and a store of value – it can be saved and used later. Early societies used shells or cattle; today we use coins, notes and digital money.
货币是任何被广泛接受作为支付手段的东西。它履行三个主要功能：交换媒介——让人们无需以物易物就能进行交易；计价单位——提供衡量和比较商品价值的方式；价值储存——可以保存起来以后使用。早期社会使用贝壳或牛；今天我们使用硬币、纸币和数字货币。
Without money, trade would be much more difficult because we would need a ‘double coincidence of wants’, meaning both traders must want exactly what the other offers. Money solves this problem and makes modern economies possible. Understanding money also helps you appreciate banks and saving.
没有货币，贸易将困难得多，因为我们需要“需求的双重巧合”，即交易双方必须恰好想要对方提供的东西。货币解决了这个问题，使现代经济成为可能。理解货币也能帮助你认识银行和储蓄的作用。
11. Trade and Specialisation | 贸易与专业化
Specialisation occurs when individuals, firms or countries concentrate on producing a limited range of goods or services where they have an advantage. For instance, a student who is quick with numbers might specialise in handling money at a charity event while others bake cakes. Specialisation increases efficiency and output.
专业化发生在个人、企业或国家集中生产他们具有优势的有限范围的商品或服务时。例如，一个对数字反应快的学生可以在慈善活动中专门负责管钱，而其他人则烘焙蛋糕。专业化提高了效率和产出。
Trade is the voluntary exchange of goods and services. By trading what they produce well, people can access a greater variety of items than if they tried to make everything themselves. The link between specialisation and trade is at the heart of economic growth, because it allows everyone to benefit from one another’s strengths.
贸易是自愿交换商品和服务的行为。通过交易各自擅长的产品，人们可以获得比自给自足时更多的物品种类。专业化与贸易之间的联系是经济增长的核心，因为它让每个人都能从彼此的长处中获益。
12. Goods and Services | 商品与服务
Economists divide output into goods (tangible items you can touch, like a textbook or a bicycle) and services (intangible activities performed for you, like a haircut or a music lesson). Both satisfy people’s wants, but they are produced and consumed in different ways. Some products are a mix: a restaurant meal is a good, while the waiter’s work is a service.
经济学家将产出分为商品（你可以触摸的有形物品，如课本或自行车）和服务（为你完成的无形活动，如理发或音乐课）。两者都满足人们的欲望，但它们被生产和消费的方式不同。有些产品是混合的：餐馆的饭菜是商品，而侍者的服务是服务。
In modern economies, the service sector often grows faster than the goods sector. Knowing the difference helps you categorise work and understand why some jobs involve making things and others involve doing things for people.
在现代经济中，服务部门往往比商品部门增长得更快。了解这一区别有助于你对工作进行分类，并理解为什么有些工作涉及制造物品，而另一些则涉及为人们做事情。
Published by TutorHao | Economics Revision Series | aleveler.com
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