📚 Year 12 CIE Engineering: Vocabulary and Terminology Quick-Memorisation Guide | 12年级 CIE 工程：词汇术语速记指南
Mastering engineering vocabulary is a cornerstone of success in Year 12 CIE Engineering. Without a firm grasp of the precise terminology, you risk losing marks not only in definition questions but also in descriptive and analytical responses. This guide transforms seemingly abstract technical terms into memorable, bite-sized concepts using word origins, visual associations, and contextual tricks. From mechanical properties to electrical principles and manufacturing processes, each section pairs essential English terms with their accurate Chinese counterparts, delivering a dual-language learning pathway that mirrors the Cambridge assessment approach.
掌握工程词汇是 12 年级 CIE 工程学取得成功的基石。如果对精确的术语没有牢固的掌握，你不仅会在定义题上丢分，还会在描述性和分析性解答中失分。本指南利用词源、视觉联想和语境技巧，将看似抽象的技术术语转化为易于记忆、可快速消化的概念。从机械性能到电气原理，再到制造工艺，每个部分都将核心英文术语与其准确的中文对应表达配对，提供一条符合剑桥评估方式的双语学习路径。
1. Mechanical Properties and Material Behaviour | 力学性能与材料行为
Stress (σ) is the internal force per unit area within a material. Think of ‘stress’ as what the material ‘feels’ internally when you pull or push it — the word itself suggests pressure and tension. The Greek symbol σ (sigma) can be remembered as a coiled spring under load.
应力 (stress, σ) 是材料内部单位面积上的内力。可以把“应力”想象成材料在被拉伸或推压时内部“感受到”的东西——这个词本身就暗示了压力和紧张。希腊字母 σ（西格玛）可以记为一个承受载荷的螺旋弹簧。
Strain (ε) is the extension per unit length, a dimensionless ratio. The word ‘strain’ shares its root with ‘string’ — imagine pulling a string until it stretches; the amount it lengthens relative to its original length is strain. The symbol ε (epsilon) looks like a stretched ‘e’, hinting at extension.
应变 (strain, ε) 是单位长度的伸长量，一个无量纲的比值。“strain” 一词与 “string”（线）同源——想象拉一根线直到它被拉长；它相对于原始长度伸长的量就是应变。符号 ε（伊普西龙）看起来像一个被拉长的 “e”，暗示着伸长。
Young’s Modulus (E) = stress ÷ strain in the linear elastic region. Memorise it as ‘Y is for stiffness — Young links to Elastic’. Young’s Modulus measures how stiff a material is; the steeper the slope on a stress-strain graph, the higher E, and the less the material deforms under load.
杨氏模量 (Young’s Modulus, E) = 线弹性区域内的应力 ÷ 应变。可记为“Y 代表刚度—— Young（杨）联系到 Elastic（弹性）”。杨氏模量衡量材料的刚度；应力-应变图上斜率越陡，E 值越高，材料在载荷下变形越小。
Yield Strength is the stress at which a material begins to deform plastically. The word ‘yield’ means ‘to give way’ — the material surrenders to the applied force. Picture a plastic ruler bending permanently; the point where it no longer springs back is its yield point.
屈服强度 (yield strength) 是材料开始发生塑性变形的应力。“yield” 一词意为“让步”——材料向施加的力量屈服。想象一把塑料尺子发生永久弯曲；不再回弹的那个点就是它的屈服点。
Toughness is the ability to absorb energy before fracturing, measured by the area under the stress-strain curve. ‘Tough’ in everyday language means durable and hard to break; in engineering it signifies both strength and ductility combined.
韧性 (toughness) 是材料断裂前吸收能量的能力，由应力-应变曲线下的面积来衡量。日常用语中 “tough” 意为坚固、不易破碎；在工程中则意味着强度和延展性的结合。
2. Electrical Fundamentals | 电气基础
Electromotive Force (EMF, ε) is the energy supplied by a source per unit charge, measured in volts. Break it down: ‘electro-‘ (electricity) + ‘motive’ (movement) — the push that makes charges move. It is not a force but an energy-per-charge concept; remember ‘EMF drives current, but it is a voltage source’.
电动势 (electromotive force, EMF, ε) 是电源每单位电荷所提供的能量，单位为伏特。可以拆解为：‘electro-’（电）+ ‘motive’（驱动）——推动电荷移动的驱动力。它不是力，而是单位电荷的能量概念；记住“EMF 驱动电流，但它是一个电压源”。
Potential Difference (P.D.) is the work done per unit charge between two points. The phrase ‘potential difference’ literally means the difference in electrical potential — the ‘voltage drop’ across a component. Think of water flowing from high to low gravitational potential; charges flow from high to low electric potential.
电势差/电压 (potential difference, P.D.) 是两点间每单位电荷做的功。“potential difference” 字面意思是“电势的差别”——即元器件两端的“电压降”。可以类比为水从高重力势流向低重力势；电荷从高电势流向低电势。
Resistance (R) limits current flow; R = V/I. The word ‘resistance’ shares the root with ‘resist’ — the component opposes the flow of charge. Visualise a narrow pipe resisting water flow; the narrower the pipe (higher R), the less water (current) for a given pressure (voltage).
电阻 (resistance, R) 限制电流流动；R = V/I。“resistance” 与 “resist”（抵抗）同源——元件阻止电荷流动。想象一根狭窄的管道阻碍水流；对于给定水压（电压），管道越窄（R 越高），水流（电流）越小。
Kirchhoff’s Current Law (KCL): The sum of currents entering a junction equals the sum leaving. Remember ‘current cannot pile up’ — just as people entering a building must eventually leave or the building overflows. ‘Kirchhoff’ sounds like ‘kirch-off’, linking to ‘current off and on branches’.
基尔霍夫电流定律 (KCL)：流入一个节点的电流之和等于流出的电流之和。记住“电流不会堆积”——就像进入一栋大楼的人最终必须离开，否则大楼会满溢。“Kirchhoff” 的发音类似 “kirch-off”，可以联想到“支路上的电流分流”。
3. Thermodynamics and Heat Transfer | 热力学与传热
Specific Heat Capacity (c) is the energy required to raise 1 kg of a substance by 1 K. ‘Specific’ often means ‘per unit mass’ in engineering; imagine a massive elephant versus a tiny mouse — the elephant needs far more energy to warm up because it has a higher total heat capacity, but the specific heat capacity is a property independent of quantity.
比热容 (specific heat capacity, c) 是使 1 kg 物质温度升高 1 K 所需的能量。工程学中“specific”通常表示“每单位质量”；想象一头巨大的大象和一只小老鼠——大象需要多得多的能量来升温，因为它总热容更高，但比热容是与数量无关的属性。
Latent Heat (L) is the energy absorbed or released during a phase change at constant temperature. ‘Latent’ means ‘hidden’ — the energy goes into breaking molecular bonds rather than raising temperature. Visualise ice melting at 0 °C; the temperature doesn’t rise until all ice turns to water, because energy is used to overcome the crystal structure.
潜热 (latent heat, L) 是在温度恒定下、相变过程中吸收或释放的能量。“latent” 意为“隐藏的”——能量用于打破分子间键合而非升高温度。想象 0 °C 的冰融化；直到所有冰都变成水，温度才不会上升，因为能量被用来克服晶体结构。
Conduction, Convection, Radiation: Three modes of heat transfer. ‘Conduction’ needs contact — like a metal spoon in hot soup. ‘Convection’ involves fluid movement — think of a ‘convection current’ in a boiling pot. ‘Radiation’ travels by electromagnetic waves — the sun’s heat reaching Earth through vacuum. The trio can be memorised with the phrase ‘Cats Carry Rats’.
导热、对流、辐射：三种传热方式。“Conduction”（导热）需要接触——就像热汤里的金属勺子。“Convection”（对流）涉及流体运动——想象沸水锅中的“对流循环”。“Radiation”（辐射）通过电磁波传播——太阳的热量真空中传递至地球。用短语“Cats Carry Rats”可记住三个词的首字母。
4. Statics and Structural Analysis | 静力学与结构分析
Equilibrium means the resultant force and resultant moment on a body are both zero. ‘Equi-‘ (equal) + ‘libra’ (balance, like the zodiac sign Libra) — everything is balanced. Picture a seesaw perfectly level with equal weights; no translation, no rotation.
平衡 (equilibrium) 意味着物体上的合外力和合力矩均为零。“Equi-”（相等） + “libra”（天平，如天秤座）——一切都处于平衡状态。想象一个完全水平的跷跷板，两端重量相等；没有平动，没有转动。
Moment of a Force (Torque) is the turning effect, calculated as force × perpendicular distance from pivot. ‘Moment’ sounds like ‘movement’ — it’s the twist that causes rotation. Remember: push a door at the handle (large perpendicular distance) versus near the hinge (small distance); the same force produces a much larger moment at the handle.
力矩 (moment of a force / torque) 是转动效应，计算公式为力 × 到支点的垂直距离。“Moment” 音似 “movement”——它是引起旋转的扭转量。记住：在门把手处推门（垂直距离大）对比在铰链附近推门（垂直距离小）；同样的力在把手处产生大得多的力矩。
Factor of Safety (FoS) = ultimate stress ÷ allowable working stress. The term is self-explanatory — how many times stronger the structure is compared to the expected load. Think of an elevator designed to hold 1500 kg when the maximum expected load is 500 kg; FoS = 3. It’s the engineering ‘safety cushion’.
安全系数 (factor of safety, FoS) = 极限应力 ÷ 许用工作应力。这个术语不言自明——结构比预期载荷强多少倍。想象一部设计承载为 1500 公斤的电梯，而预期最大载荷仅为 500 公斤；安全系数为 3。这是工程上的“安全缓冲垫”。
5. Dynamics and Kinematics | 动力学与运动学
Velocity (v) is the rate of change of displacement, a vector. ‘Velocity’ comes from Latin ‘velocitas’ meaning speed; engineers distinguish velocity (direction-aware) from speed (scalar). Visualise a car going around a roundabout — its speed may be constant, but its velocity changes because direction changes.
速度 (velocity, v) 是位移的变化率，是一个矢量。“Velocity” 来自拉丁语 “velocitas” 意为快慢；工程师区分速度（有方向）和速率（标量）。想象一辆汽车绕环岛行驶——其速率可能恒定，但速度在改变，因为方向在改变。
Acceleration (a) is the rate of change of velocity, Δv/Δt. The word contains ‘accelerate’ — to speed up. In engineering, any change in velocity (speeding up, slowing down, or changing direction) is acceleration. An object in uniform circular motion constantly accelerates towards the centre (centripetal acceleration).
加速度 (acceleration, a) 是速度的变化率，Δv/Δt。单词包含 “加速” 之意。在工程中，速度的任何变化（加速、减速或改变方向）都是加速度。一个匀速圆周运动的物体持续向着中心加速（向心加速度）。
Newton’s Second Law gives F = ma. ‘Force equals mass times acceleration’. Link the pronunciation: ‘F = ma’ sounds like ‘Fame ah!’ — imagine a Hollywood star accelerating to fame because a big force (a powerful agent) acts on their mass (career). The direction of acceleration is always the same as the net force.
牛顿第二定律给出 F = ma。“力等于质量乘以加速度”。“F = ma” 的发音类似 “Fame ah!”——想象一位好莱坞明星因其强大的推手（大合力）作用于其职业（质量）而加速成名。加速度的方向总是与净力同向。
6. Materials Science and Alloys | 材料科学与合金
Ferrous Metals contain iron; ‘ferrous’ comes from Latin ‘ferrum’ meaning iron. Think of the chemical symbol Fe. These metals are typically magnetic and can rust. Examples: steel, cast iron. ‘Ferrous’ sounds like ‘ferrous wheel’ — a big iron wheel.
黑色金属/铁合金 (ferrous metals) 含铁；“ferrous” 来自拉丁语 “ferrum” 意为铁。想想化学符号 Fe。这类金属通常有磁性且会生锈。例子：钢、铸铁。“Ferrous” 发音类似 “ferris wheel”（摩天轮）——一个大的铁轮子。
Alloy is a mixture of a metal with other elements to improve properties. ‘Alloy’ sounds like ‘alloy’ (a loyal companion) — the added elements ‘ally’ with the base metal to enhance strength, corrosion resistance, or hardness. For instance, adding carbon to iron makes steel, which is far stronger than pure iron.
合金 (alloy) 是金属与其他元素混合以改善性能的产物。“Alloy” 的发音类似 “ally”（盟友）——添加的元素与基体金属“结盟”，以增强强度、耐腐蚀性或硬度。例如，在铁中加入碳制成钢，强度远高于纯铁。
Heat Treatment processes like annealing, quenching, and tempering alter mechanical properties. ‘Annealing’ sounds like ‘healing’ — heating metal and then slow cooling relieves internal stresses, ‘healing’ the material. ‘Quenching’ (rapid cooling) can be linked to ‘quench your thirst quickly’ — it’s a fast dip into water or oil.
热处理 (heat treatment) 工艺如退火、淬火和回火改变机械性能。“Annealing”（退火）音似 “healing”（愈合）——加热金属后缓慢冷却可以消除内应力，“愈合” 材料。“Quenching”（淬火，快速冷却）可与 “快速解渴” 联想——这是一种快速浸入水或油中的操作。
7. Manufacturing Processes | 制造工艺
Casting involves pouring molten metal into a mould. The word ‘cast’ means to throw or shape — imagine casting a fishing line, you are shaping the trajectory. In metal casting, you shape the metal by pouring. ‘Die casting’ uses a permanent metal mould under high pressure.
铸造 (casting) 涉及将熔融金属浇入模具。“cast” 意为投掷或塑形——想象抛钓鱼线，你正在塑造轨迹。在金属铸造中，你通过浇注来使金属成形。“压铸 (die casting)” 使用高压力下的永久金属模具。
Machining removes material using cutting tools to achieve desired shape. Think of ‘machine’ doing work — milling, turning, drilling are all machining processes. The key is subtractive manufacturing: starting with more material and cutting away. Chips are produced.
机加工/切削加工 (machining) 使用切削刀具去除材料以获得所需形状。想到“机器”在做功——铣削、车削、钻削都是机加工工艺。关键是减材制造：从较多材料开始，逐步切掉。会产生切屑。
Forming deforms material without removing it, such as bending, forging, rolling. ‘Forming’ suggests giving form. Forging (‘forge’ — to shape with hammer blows) is like a blacksmith shaping hot metal. Rolling is like flattening dough with a rolling pin but for steel.
成形 (forming) 使材料变形而不去除材料，例如弯曲、锻造、轧制。“Forming” 暗示赋予形状。锻造（“forge”——用锤打成形）就像铁匠塑造热金属。轧制就像用擀面杖擀平面团，但对象是钢铁。
8. Engineering Drawing and CAD | 工程制图与计算机辅助设计
Orthographic Projection is a method of representing a 3D object in 2D views (front, top, side). ‘Ortho-‘ means straight/correct, ‘graphic’ means drawing. The views are projected at 90° angles. Remember ‘ortho’ as in ‘orthodontist’ who straightens teeth; orthographic drawings show straight-on true shapes.
正投影 (orthographic projection) 是一种用二维视图（前视图、俯视图、侧视图）表示三维物体的方法。“Ortho-” 意为正/直，“graphic” 意为图。视图以 90 度角投影。可联想 “orthodontist”（正畸牙医）中的 “ortho”——正投影图显示正对着的真实形状。
Isometric Drawing shows a 3D view where axes are 120° apart. ‘Iso-‘ (equal) + ‘metric’ (measure) — scales along the three axes are equal. Unlike perspective, parallel lines remain parallel. Think of a cube drawn with a 30° angle tilt; all edges have the same scale.
等轴测图 (isometric drawing) 展示一个三维视图，轴线夹角为 120°。“Iso-”（相等）+ “metric”（度量）——沿三个轴的比例尺都相等。与透视图不同，平行线保持平行。想象一个以 30° 倾角绘制的立方体；所有边的比例相同。
CAD (Computer-Aided Design) is the use of computer software to create precision drawings and 3D models. ‘Aided’ emphasises that the computer assists the designer — it is not ‘Computer Automated Design’. Features like parametric modelling allow quick modifications. Memory aid: ‘CAD’ rhymes with ‘pad’, like a digital drawing pad.
CAD (计算机辅助设计, Computer-Aided Design) 是使用计算机软件创建精确图纸和三维模型的技术。“Aided” 强调计算机辅助设计师——而不是“计算机自动化设计”。参数化建模等功能允许快速修改。记忆方法：“CAD” 与 “pad” 押韵，就像数字绘图板。
9. Fluid Mechanics Essentials | 流体力学基础
Viscosity is a fluid’s resistance to flow. High viscosity means thick and slow-flowing (like honey); low viscosity means thin and runny (like water). The word contains ‘vis’- (similar to ‘viscous’) — imagine stirring thick syrup; the resistance you feel is viscosity. It changes with temperature.
粘度 (viscosity) 是流体对流动的阻力。高粘度意味着粘稠、流动慢（如蜂蜜）；低粘度意味着稀薄、易流动（如水）。单词包含 ‘vis’-（类似 viscous）—— 想象搅拌浓稠的糖浆；你感受到的阻力就是粘度。它随温度变化。
Reynolds Number (Re) predicts flow regime (laminar or turbulent). The formula is Re = ρvd/μ. Too complex to memorise by heart for vocabulary, but link ‘Reynolds’ to ‘reigns’ — the number that reigns over flow type. Low Re means orderly flow; high Re means chaotic turbulence.
雷诺数 (Reynolds number, Re) 预测流态（层流或湍流）。公式为 Re = ρvd/μ。词汇层面无需死记硬背公式，但可将 “Reynolds” 联想为 “reigns”（统治）—— 统治流型的数值。低 Re 表示有序层流；高 Re 表示混沌湍流。
Bernoulli’s Principle states that an increase in fluid speed occurs simultaneously with a decrease in pressure or potential energy. ‘Bernoulli’ sounds like ‘burn-oulli’ — imagine energy being ‘burned’ from pressure to kinetic energy. For a steady, incompressible flow, total pressure energy stays constant along a streamline.
伯努利原理 (Bernoulli’s Principle) 指出流体速度增加的同时，压力或势能降低。“Bernoulli” 音似 “burn-oulli”——想象能量从压力“转化”为动能。对于稳定、不可压缩流动，沿流线总压强能保持恒定。
10. Electrical Components and Circuit Theory | 电气元件与电路原理
Capacitance (C) is the ability of a component to store charge per unit voltage, C = Q/V. ‘Capacitance’ shares root with ‘capacity’ — think of a bucket’s capacity for water; a capacitor’s ‘bucket’ stores electric charge. The unit farad (F) is named after Michael Faraday.
电容 (capacitance, C) 是元件存储电荷的能力，每单位电压储存电荷量，C = Q/V。“Capacitance” 与 “capacity”（容量）同源—— 想象水桶的容量；电容器则用“桶”存储电荷。单位法拉 (F) 以迈克尔·法拉第命名。
Inductance (L) is the property of a conductor that opposes changes in current. Think ‘induct’ as in ‘induce’ — a changing magnetic field induces an EMF that opposes the change. An inductor resists current changes just as a large mass resists acceleration changes (electrical inertia).
电感 (inductance, L) 是导体阻碍电流变化的性质。联想 “induct” 如同 “induce”（感应）——变化的磁场感应出一个对抗变化的电动势。电感器像抵抗加速度变化的大质量物体一样抗拒电流变化（电气惯性）。
Impedance (Z) is the total opposition to alternating current, combining resistance and reactance. ‘Impede’ means to obstruct — impedance is the AC obstruction. It is a complex quantity; the real part is resistance, the imaginary part is reactance. Use ‘Z’ for ‘Zee total opposition’.
阻抗 (impedance, Z) 是对交流电的总阻碍，综合了电阻和电抗。“Impede” 意为阻碍——阻抗是交流通路中的障碍。它是一个复数；实部为电阻，虚部为电抗。用 “Z” 代表 “总 (Zong) 阻抗”。
11. Measurement and Instrumentation | 测量与仪表
Accuracy vs. Precision: Accuracy is closeness to the true value; precision is repeatability of measurements. The classic dartboard analogy: precise cluster far from bullseye is precise but not accurate; scattered hits around bullseye are accurate but imprecise. ‘Ac-cu-ra-cy’ has ‘actual’ buried inside — how close to actual true value.
准确度与精密度：准确度是测量值接近真值的程度；精密度是测量值的可重复性。经典的靶子类比：远离靶心但密集一团的飞镖是精密但不准确；围绕靶心分散的飞镖是准确但不精密。“Accuracy”（准确度）中包含 “actual”（真实的）—— 与真实值有多接近。
Calibration is adjusting an instrument to match a known standard. ‘Cali-‘ thinks ‘scale’ — you are correcting the scale. Imagine resetting a weighing scale to zero before measurement; that’s calibration. Periodic calibration ensures traceability and reliability.
校准 (calibration) 是将仪器调整到与已知标准相符。“Cali-”联想到“刻度”——你在修正刻度。想象称重前将磅秤归零；那就是校准。定期校准确保可追溯性和可靠性。
Tolerance is the permissible limit of variation in a dimension. The word is common in everyday language — ‘tolerance for error’. In engineering, a shaft diameter of 20 mm ± 0.1 mm means the tolerance is 0.2 mm. It reflects the manufacturing precision required.
公差 (tolerance) 是尺寸允许的变动量。这个词在日常生活中常见——“容差范围”。在工程中，直径为 20 mm ± 0.1 mm 表示公差为 0.2 mm。它反映了所需的制造精度。
12. Project and Systems Engineering Terms | 项目与系统工程术语
Specification is a detailed description of design requirements and constraints. ‘Specs’ for short — think of glasses ‘specs’ that specify the exact lens power. A design specification lists all must-have and desirable features, serving as the project’s rulebook.
规格 / 规范 (specification) 是设计要求和约束条件的详细描述。简写为 “specs”——联想到眼镜的 “specs”（规格）精确标定了镜片度数。设计规格书列出了所有必备和期望特性，作为项目的规则手册。
Prototype is an early sample built to test a concept or process. ‘Proto-‘ means first, ‘type’ means model. It is the first physical version. Remember ‘pro-to-type’ — professional type, but still experimental. Prototyping helps identify design flaws before mass production.
原型 (prototype) 是为测试概念或流程而制作的早期样品。“Proto-” 意为最初，“type” 意为模型。它是第一个实物版本。记住 “pro-to-type”—— 专业型号，但仍处于实验阶段。原型制作有助于在批量生产前发现设计缺陷。
Feedback in control systems is a portion of the output signal returned to the input to regulate performance. ‘Feed back’ literally — you feed part of the output back to the input. Negative feedback stabilises systems; imagine a thermostat switching off the heater when the set temperature is reached.
反馈 (feedback) 在控制系统中是将部分输出信号返送回输入端以调节性能。“Feed back” 字面意思就是“喂回去”—— 你把部分输出送回到输入。负反馈使系统稳定；想象恒温器在达到设定温度时关闭加热器。
Published by TutorHao | Engineering Revision Series | aleveler.com
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