📚 Year 12 Cambridge Geography: Glossary & Memory Tricks for Key Terms | 剑桥地理关键术语速记指南
Mastering key terminology is the first step to excelling in Year 12 Cambridge Geography. The ability to define, apply, and critically analyse terms is essential for both structured questions and essays. This guide not only provides clear definitions for the most important concepts but also offers memory hooks, word-part breakdowns, and visual associations to make them stick in your long‑term memory. Use this as a revision companion throughout the AS and A‑level course.
掌握关键术语是学好剑桥地理 Year 12 课程的第一步。无论是结构化问题还是论文题，你都需要能够准确定义、灵活运用并批判性地分析这些术语。本指南不仅为最重要的概念提供清晰的释义，还通过记忆线索、词根拆解和形象联想，帮你把知识牢牢巩固在长期记忆里。整个 AS 和 A-level 学习阶段都可以把它当成复习伙伴。
1. River Systems and Hydrology | 河流系统与水文
Drainage basin – the area of land drained by a river and its tributaries. Think of a kitchen basin catching water from the surrounding countertop; the basin rim is the catchment divide.
流域 – 由一条河流及其支流排水的陆地区域。可以想象一个厨房水槽接收周围台面的水流；水槽的边缘就是流域分水岭。
Discharge (Q) – volume of water flowing past a point per unit time, expressed as Q = A × V (cross‑sectional area × velocity). The units (m³/s) remind us that it is a volume rate.
流量 (Q) – 单位时间内通过某一点的流水体积，公式为 Q = A × V（过水断面积 × 流速）。单位 m³/s 提醒我们流量是一种体积速率。
Hydraulic radius – a measure of channel efficiency: cross‑sectional area ÷ wetted perimeter. A high hydraulic radius means less friction and faster flow, like a deep, narrow chute versus a wide, shallow one.
水力半径 – 衡量河道效率的指标：过水断面积 ÷ 湿周。水力半径大意味着摩擦小、流速快，好比一条深窄的滑道相对于宽浅的河道。
Hydrograph – a graph showing river discharge over time, usually before, during, and after a storm. The rising limb, peak, and recession limb tell you how quickly water reaches the channel; flashy rivers have short lag times.
流量过程线 – 显示河流流量随时间变化的图，通常覆盖暴雨前、中、后时段。涨水段、峰值和退水段揭示水进入河道有多快；暴涨的河流滞后时间短。
2. Coastal Landscapes and Processes | 海岸地貌与过程
Fetch – the uninterrupted distance over which the wind blows across open water. The longer the fetch, the larger the waves; think of a ‘fetch’ as the wind’s running start.
风区长度 – 风在开阔水面上不受阻碍地吹过的距离。风区长度越大，波浪越大；可以把 ‘fetch’ 想象成风的助跑距离。
Longshore drift – the zigzag movement of sediment along a coastline driven by waves hitting at an angle. The swash carries material diagonally up the beach, and the backwash drags it straight back down. Net transport is always along the shore.
沿岸漂移 – 波浪以一定角度拍岸，导致沉积物沿海岸线呈锯齿状运动。上冲流把碎屑斜向推上滩面，回流则沿最陡坡向拉回；净运移始终顺着海岸方向。
Wave refraction – the bending of waves as they approach irregular coastlines, concentrating energy on headlands and dispersing it in bays. Visualise the wave fronts aligning with the underwater contours, just like light bending in water.
波浪折射 – 波浪接近不规则海岸线时发生弯曲，使能量集中于岬角、在海湾处消散。想象波峰线逐渐与水下等高线平行，就像光在水中折射一样。
Eustatic vs. isostatic change – eustatic change is a global shift in sea level (e.g., due to ice melting), while isostatic change is localised vertical land movement (e.g., land rising after ice sheets melt). ‘Eu’ = good/global; ‘iso’ = equal/same, referring to local rebound.
海面升降与地壳均衡变化 – 海面升降是全球性海平面变化（如冰融），地壳均衡变化是局地的垂直陆块运动（如冰盖消融后地面抬升）。’Eu’ 表示广泛/全球，’iso’ 表示均等/相同，指局部均衡回弹。
3. Atmosphere, Weather and Climate | 大气、天气与气候
Albedo – the proportion of solar radiation reflected by a surface (0–1 or %). Snow has a high albedo, forests have a low albedo. Think ‘albedo = albino = bright/white’ to remember it is about reflection.
反照率 – 地表反射太阳辐射的比例（0–1 或百分比）。雪地反照率高，森林反照率低。联想 ‘albedo’ 与 ‘albino’（白化）发音相近，表示“白亮的、反射的”。
Intertropical Convergence Zone (ITCZ) – a low‑pressure belt near the equator where trade winds converge, causing intense uplift and rainfall. It migrates with the overhead sun; picture a moving ‘rain belt’ around the Earth’s waist.
热带辐合带 (ITCZ) – 赤道附近的低压带，信风汇聚于此，产生强烈上升气流和降水。它随太阳直射点移动；可以想象一条移动的“雨带”环在地球腰间。
Pressure gradient force – the force that drives air from high to low pressure, proportional to the pressure difference. A steep pressure gradient (close isobars) means strong winds; think of a skateboarder rolling down a steep hill.
气压梯度力 – 驱动空气从高压流向低压的力，与气压差成正比。梯度陡（等压线密）意味着强风；好比滑板手从一个陡坡滑下。
Orographic rainfall – rain caused when moist air is forced to rise over mountains, cools, condenses, and precipitates. The windward slope gets heavy rain, the leeward side lies in a rain shadow. ‘Oro’ = mountain (orography).
地形雨 – 湿空气被迫抬升过山，冷却凝结成雨。迎风坡雨水充沛，背风坡处于雨影区。’Oro’ 源自希腊语“山”。
4. Tectonic Hazards | 地质灾害
Focus (hypocentre) – the point inside the Earth where an earthquake originates. Directly above it on the surface is the epicentre. Think of the focus as the ‘source’ and epicentre as the ‘landmark above it’.
震源 (hypocentre) – 地球内部地震发生的点。其正上方的地表点称为震中。把震源看作“源头”，震中看作“上方标记”。
Richter vs. Mercalli scales – The Richter scale measures earthquake magnitude (energy released) logarithmically; the Mercalli scale measures intensity based on observed effects and damage. Richter is a number, Mercalli is a Roman numeral.
里氏震级与麦加利烈度 – 里氏震级以对数表示地震规模（释放的能量）；麦加利烈度根据观测到的效果和破坏程度评定。里氏是数字，麦加利是罗马数字。
Seismic gap – a section of a fault that has not experienced an earthquake for a long period, considered at high risk of future rupture. Think of it as an ‘overdue’ seismic segment that stores strain.
地震空区 – 断层带上长时间未发生地震的地段，被认为未来破裂的风险很高。可以把空区看作一个“逾期未动”的蓄力段。
Liquefaction – the process by which saturated, unconsolidated soil turns into a fluid‑like state during shaking, causing buildings to sink or tilt. Imagine wet sand on a vibrating tray turning to quicksand.
地震液化 – 饱和的松散土壤在震动中转化为流体状态，导致建筑下沉或倾斜。想象振动盘上的湿沙变成流沙。
5. Rocks and Weathering | 岩石与风化
Weathering vs. erosion – Weathering is the in‑situ breakdown of rock (no movement), while erosion involves the removal and transport of material. ‘W’ for weathering stays ‘Where it is’.
风化与侵蚀 – 风化是岩石原地破碎分解（没有迁移），侵蚀则涉及物质的剥离和搬运。记忆：风化的“风”可以想象成“封”在原地。
Freeze‑thaw (frost shattering) – water enters cracks, freezes, expands by about 9%, and wedges rocks apart. It is most effective in cold, wet climates with frequent temperature swings around 0°C.
冻融作用 (冰劈作用) – 水渗入岩缝，结冰时体积膨胀约9%，使岩石楔裂。在寒冷潮湿、气温频繁在0°C上下波动的地区最为活跃。
Chemical weathering: carbonation – rainwater containing dissolved CO₂ forms weak carbonic acid, which dissolves limestone and chalk. The reaction is CaCO₃ + H₂CO₃ → Ca(HCO₃)₂ (calcium bicarbonate, soluble).
化学风化：碳化作用 – 溶解了 CO₂ 的雨水形成弱碳酸，溶蚀石灰岩和白垩岩。反应式：CaCO₃ + H₂CO₃ → Ca(HCO₃)₂（可溶的碳酸氢钙）。
Mass movement: slumping – a rotational slide of material along a curved failure surface, often triggered by undercutting and heavy rain. The backward rotation leaves a scarp and a hummocky toe.
块体运动：旋转滑动 – 物质沿弯曲的破坏面发生旋转式下滑，常由坡脚掏蚀和暴雨引发。反向旋转留下断崖和丘状坡脚。
6. Population Dynamics | 人口动态
Demographic Transition Model (DTM) – a five‑stage model describing population change over time based on birth and death rates. Stages 1–3 show declining death rates; Stage 4 low birth and death rates; Stage 5 natural decrease. Visualise it as five ‘steps’ of development.
人口转变模型 (DTM) – 基于出生率和死亡率描述人口随时间变化的五阶段模型。1–3 阶段死亡率下降，第4 阶段出生率和死亡率均低，第5 阶段自然减少。把它形象为发展的五个“台阶”。
Dependency ratio – the ratio of non‑working‑age population (0–14 and 65+) to the working‑age population (15–64), multiplied by 100. A high ratio indicates a heavy economic burden; ‘dependents’ depend on the workers.
赡养比 – 非劳动年龄人口（0–14 和 65+）与劳动年龄人口（15–64）的比值，通常乘以 100。高赡养比意味着沉重的经济负担；“赡养”表示要依靠劳动者。
Population momentum – the continued population growth even after fertility declines to replacement level, because of a large child‑bearing cohort. Think of a loaded spring that keeps moving even after you stop pushing.
人口惯性 – 即使生育率降至更替水平后，由于庞大的育龄人群，人口仍会继续增长。像一个压紧的弹簧，即使不再用力，它也会继续弹跳。
Replacement level fertility – a total fertility rate of about 2.1 children per woman in developed countries, the level needed to replace the population without migration. The extra 0.1 accounts for infant mortality and non‑reproducing women.
更替水平生育率 – 在发达国家大约是总和生育率2.1，即不依赖移民维持人口规模所需的水平。多出的0.1 用以补偿婴儿死亡和非生育女性。
7. Urban Settlements and Urbanisation | 城市聚落与城市化
Urbanisation – an increase in the proportion of a country’s population living in urban areas. It is a process (not just growth), driven by rural‑to‑urban migration and natural increase.
城市化 – 一个国家人口中居住在城镇地区的比例上升的过程（不仅仅是增长），由乡城迁移和自然增长驱动。
Mega‑city – a metropolitan area with a total population exceeding 10 million people. Focus on the ‘mega’ as in ‘megabyte’—big number.
超大城市 – 总人口超过1000 万的大都市区。把 ‘mega’ 与 ‘megabyte’ 联想，表示海量。
Central Business District (CBD) – the commercial and economic core of a city, characterised by high land values, tall buildings, and the greatest accessibility. Also known as the ‘downtown’ or ‘City’ in London.
中央商务区 (CBD) – 城市商业和经济核心，特征为高土地价值、高层建筑和最佳的可达性。即常见的“市中心”或伦敦的 ‘City’ 区。
Gentrification – the transformation of a run‑down urban neighbourhood through the influx of middle‑class residents, rising property prices, and new businesses. Think of ‘gentry’—the landed elite—moving in.
绅士化 – 中产阶层涌入破旧城区，导致房价上涨和新商态出现的过程。联想 ‘gentry’（乡绅）进驻，推动社区升级。
8. Globalisation and Transnational Corporations | 全球化与跨国公司
Globalisation – the growing interdependence of countries through the cross‑border flow of capital, goods, services, information, and people. Picture a spider‑web connecting economies worldwide.
全球化 – 通过资本、商品、服务、信息和人员的跨境流动，各国之间的相互依赖日益加深。想象一张连接世界经济的蜘蛛网。
Transnational corporation (TNC) – a company with operations (production, sales, or services) in more than one country. Its headquarters are often in a developed country, while production may be in emerging economies for cost savings.
跨国公司 (TNC) – 在多个国家设有经营（生产、销售或服务）的企业。总部常设在发达国家，生产环节则可能分布在新兴经济体以节省成本。
Outsourcing vs. offshoring – outsourcing is contracting an external firm to handle business functions; offshoring is relocating a business process to another country, often for lower costs. Outsourcing can be domestic; offshoring always crosses a border.
外包与离岸外包 – 外包是将业务职能委托给外部公司；离岸外包是将业务流程迁移到另一个国家，通常为了降低成本。外包可以在国内进行，离岸外包必然跨境。
Time–space convergence – the reduction in the time taken to travel or communicate between places due to improvements in transport and technology. The world feels ‘smaller’: London to New York was weeks by ship, now hours by plane.
时空收敛 – 由于交通和通信技术的进步，地点间的旅行或通讯所需时间缩短。世界感觉“变小”：伦敦到纽约过去乘船需数周，现在飞行仅数小时。
9. Development and Inequality | 发展与不平等
GDP per capita – the total value of goods and services produced in a country in one year divided by the mid‑year population. It is an average, so it hides internal inequality; think ‘per head’.
人均GDP – 一国一年内生产的商品和服务总值除以年中人口。它只是一个平均数，掩盖了内部的贫富差距；与“平均每人”对应。
Human Development Index (HDI) – a composite index combining life expectancy, education (mean and expected years), and GNI per capita. Scores range from 0 to 1; remember ‘health, education, income’.
人类发展指数 (HDI) – 综合了预期寿命、教育（平均和预期受教育年限）和人均国民总收入的指标。取值 0–1；记住三个维度：“健康、教育、收入”。
Gini coefficient – a measure of income inequality within a country, ranging from 0 (perfect equality) to 1 (or 100) (perfect inequality). A low Gini means the pie is shared evenly.
吉尼系数 – 衡量一国内部收入不平等的指标，0（完全平等）到 1（或 100）（完全不平等）。吉尼系数低表示“蛋糕”分得较均匀。
Core-periphery model – a spatial model showing how economic activity and wealth are concentrated in a dominant ‘core’ region, while ‘peripheries’ supply resources and labour. The core accumulates advantages over time.
核心-边缘模型 – 一种空间模型，显示经济活动和财富集中在主导的“核心”区域，而“边缘”提供资源和劳动力。核心随时间积累优势。
10. Environmental Management and Sustainability | 环境管理与可持续性
Sustainability – meeting the needs of the present without compromising the ability of future generations to meet their own needs. Think of three overlapping pillars: environment, society, and economy.
可持续性 – 既满足当代人的需要，又不损害后代人满足其需要的能力。想象三个交叉的支柱：环境、社会和经济。
Carrying capacity – the maximum population size that an environment can support indefinitely without being degraded. It applies to both ecosystems and human populations; picture a boat’s weight limit.
承载能力 – 环境在长远不被破坏的前提下能持续供养的最大种群数量。适用于生态系统和人口；想象船的载重限度。
Carbon sink – a natural reservoir (forests, oceans, soil) that absorbs more carbon dioxide than it releases. Protecting sinks is crucial to mitigating climate change; they ‘soak up’ carbon.
碳汇 – 吸收的二氧化碳多于其排放的天然储库（森林、海洋、土壤）。保护碳汇对减缓气候变化至关重要；它们能“吸收”碳。
Ozone depletion – thinning of the stratospheric ozone layer, mainly by chlorofluorocarbons (CFCs), allowing harmful UV radiation to reach the surface. The ‘hole’ appears over Antarctica each spring.
臭氧层耗竭 – 平流层臭氧层变薄，主因是氯氟烃（CFCs），让有害紫外线到达地表。每年春季南极上空出现“空洞”。
11. Geographical Skills and Key Measures | 地理技能与常用量度
Spearman’s rank correlation – a statistical test used to assess the strength and direction of a monotonic relationship between two variables. The value rₛ ranges from –1 (perfect negative) to +1 (perfect positive). Remember ‘Spearman’ = ‘rank’ starts with ‘Sp’ sounds like ‘spear’ ranking.
斯皮尔曼等级相关系数 – 用于检验两个变量之间单调关系强度与方向的统计量。rₛ 取值从 –1（完全负相关）到 +1（完全正相关）。联想 ‘Spearman’ 中的 ‘rank’（等级）。
Standard deviation – a measure of the spread of data around the mean. A small standard deviation means data points are clustered close to the mean; ‘deviation’ = how far off the average.
标准差 – 衡量数据围绕均值的分散程度。标准差小表示数据点紧密聚集在均值附近；’deviation’ 就是偏离平均的程度。
Choropleth map – a map where areas are shaded or patterned in proportion to the measurement of a variable. Darker shades often represent higher values; think ‘colour‑plot’.
等值区域图 – 用不同深浅或图案显示区域内变量数值大小的地图。深色通常代表较高值；记忆为“彩色分区图”。
Hypothesis testing – a systematic procedure for deciding whether to accept or reject a null hypothesis (H₀) based on sample data. The p‑value tells you the probability the result is due to chance; p < 0.05 is typically ‘statistically significant’.
假设检验 – 根据样本数据决定接受或拒绝零假设（H₀）的系统程序。p 值表示结果由偶然引起的概率；通常 p < 0.05 被视为“统计显著”。
12. Linking Landscapes and People: System Concepts | 连接景观与人群：系统概念
System – a set of interrelated components working together towards some kind of equilibrium. In geography, rivers, coasts, and cities can be viewed as systems with inputs, stores, transfers, and outputs.
系统 – 一套相互关联的组成部分共同追求某种均衡。地理学中，河流、海岸和城市都可视为具有输入、存储、传输和输出的系统。
Open vs. closed system – an open system exchanges both matter and energy with its surroundings (e.g., a river basin); a closed system exchanges only energy (e.g., the global water cycle). Think of a boiling pan with a lid as a closed pot for matter, but energy still escapes.
开放系统与封闭系统 – 开放系统与周围环境交换物质和能量（如流域）；封闭系统仅交换能量（如全球水循环）。想象一个有盖的煮锅，对物质是封闭的，但热量仍可散出。
Feedback (positive and negative) – positive feedback amplifies change (e.g., ice‑albedo feedback), moving the system away from equilibrium; negative feedback dampens change and restores balance (e.g., thermoregulation in a body). ‘Positive’ adds to the change, ‘negative’ negates it.
反馈（正反馈与负反馈） – 正反馈放大变化（如冰-反照率反馈），使系统偏离平衡；负反馈减弱变化并恢复平衡（如身体的体温调节）。‘正’表示加强变化，‘负’表示抵消变化。
Dynamic equilibrium – a state of balance in an open system where inputs and outputs fluctuate around a long‑term average, but the system maintains its overall character. A stream may alter its course but still transport its water and sediment load.
动态平衡 – 开放系统的一种平衡状态，输入和输出围绕长期平均值波动，但系统整体特征保持不变。河流可以改变河道，但仍输运水和泥沙。
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