KS3 OCR Engineering: Key Terminology Quick Memorisation Guide | KS3 OCR 工程：关键术语速记指南

📚 KS3 OCR Engineering: Key Terminology Quick Memorisation Guide | KS3 OCR 工程：关键术语速记指南

Welcome to your essential guide for mastering engineering terminology at KS3 level, aligned with the OCR curriculum. Engineering is a language of precision, and knowing the right terms will help you understand concepts, communicate ideas, and excel in your assessments. This article presents key vocabulary grouped by topic, with simple definitions and memorable memory tricks. Whether you are revising for a test or building a foundation for future study, these bite-sized paired explanations will make technical words stick.

欢迎使用这份 KS3 OCR 工程术语速记指南。工程学是一门注重精确性的学科，掌握关键术语能帮你更好地理解概念、表达设计思路，并在测评中脱颖而出。本文按主题分类，为你提供简明定义和实用记忆技巧。无论你是为了准备考试，还是想为未来的学习奠定基础，这些中英对照的简短解释都会让专业词汇变得轻松易记。

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1. Materials and Their Properties | 材料及其性质

Ductility: The capacity of a material to be stretched into a long, thin wire without breaking. Think of copper being pulled into electrical cable. Memory aid: ‘duct’ sounds like ‘duck’, and a duck’s neck can stretch, just like a ductile metal extends.

“延展性”： 材料被拉伸成细长丝状而不断裂的能力，例如铜可以被拉制成电线。记忆口诀：”延”就是延长，想象拉面条越拉越细，或者把 ‘duct’ 联想成 “导管”，金属像导管一样可延伸。

Malleability: The ability of a material to be hammered or rolled into thin sheets without cracking. Gold and aluminium are highly malleable. Think of a ‘mallet’ hammering metal flat.

“可锻性”： 材料能够被锤打或轧制成薄片而不会破裂的性质。金和铝就具备很好的可锻性。把 ‘malleable’ 拆成 “mallet (木槌) + able”，一锤子下去能变薄，就是可锻。

Hardness: Resistance of a material to being scratched or dented on its surface. Diamond is extremely hard. To remember, imagine scratching a ‘hard’ phone screen – a harder material leaves a mark.

“硬度”： 材料表面抵抗刮擦或压痕的能力。钻石之所以能划玻璃，就是因为硬度极高。记忆时可以自问：”什么能划伤什么？” 硬的划软的，就像指甲划肥皂。

Toughness: A measure of how much energy a material can absorb before fracturing. Tough materials, like polycarbonate safety glasses, withstand impacts. Think of a ‘tough’ rugby player who absorbs tackles without breaking.

“韧性”： 材料在断裂前能吸收能量的程度。例如聚碳酸酯安全眼镜可以承受冲击。把 ‘tough’ 想象成橄榄球运动员，被撞却不倒下，说明他 “韧” 性强。

Elasticity: The property that allows a material to return to its original shape after being stretched or compressed. Rubber bands show high elasticity. Remember an ‘elastic’ waistband – it stretches and springs back.

“弹性”： 材料在被拉伸或压缩后能恢复原状的性质。橡皮筋就是弹性的典型代表。联系生活：弹性就像 “弹” 簧，拉开后能弹回；’elastic’ 一词本身就有回弹的感觉。

Electrical Conductivity: How easily a material allows electric current to flow through it. Copper and silver are excellent conductors. Visualise electrons moving freely along a ‘conduct’ path like cars on a motorway.

“导电性”： 材料允许电流通过的能力。铜和银是出色的导体。可以想象电子就像在高速公路上通行的车辆，导体就是畅通无阻的道路，绝缘体则是路障。

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2. Manufacturing Processes | 制造工艺

Casting: Pouring molten metal or plastic into a mould where it cools and solidifies into a specific shape. Think of making jelly in a mould. ‘Cast’ suggests shaping, as in a plaster cast for a broken arm.

“铸造”： 将熔融的金属或塑料浇入模具中，冷却凝固后获得特定形状的工艺。好比把果冻液倒入模子中定型。 ‘Cast’ 让人联想到 “铸造” 和 “模具”，就像打石膏固定手臂一样塑形。

Forging: Shaping metal by heating and hammering, often while hot. Blacksmiths use forging to make horseshoes. The word ‘forge’ brings to mind a strong hammer blow, repeatedly shaping the metal.

“锻造”： 通过加热和锤击使金属成型的方法，通常趁热加工。铁匠用此法打造马蹄铁。 ‘forge’ 听起来像 “锻造”，想象一下大力锤打烧红的铁块，反复锤炼成型。

Welding: Joining two pieces of metal by melting them together, often with a filler material, creating a strong bond. Picture a welder’s bright arc fusing steel plates like a superhero’s laser.

“焊接”： 将两块金属熔化并融合在一起，常用焊条填充，形成牢固连接。你可以想象电焊弧光像超级英雄的激光，将钢板融成一体。

Soldering: A lower-temperature process that joins metal parts using a filler alloy called solder, commonly used in electronics. ‘Solder’ sounds like ‘soldier’ – tiny soldiers standing in line on a circuit board.

“锡焊”： 在较低温度下，用称为焊锡的填充合金连接金属零件的工艺，广泛用于电子行业。把 ‘solder’ 听成 ‘soldier (士兵)’，焊点就像电路板上排队站立的微型士兵。

Extrusion: Forcing material through a shaped die to produce long components with a constant cross-section, like aluminium window frames. Imagine squeezing toothpaste out of a tube – the paste takes the shape of the nozzle.

“挤压成型”： 将材料压过特定形状的模具，生产出截面一致的细长零件，例如铝制窗框。回忆挤牙膏的情景：牙膏从管口推出后变成管口的形状，这就是 ‘extrusion’。

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3. Forces and Motion | 力与运动

Tension: A pulling force that stretches a material. In a tug-of-war, the rope is under tension. Think of ‘tension’ as “tense” – the rope feels tight and stressed.

“张力”： 拉伸材料的力。拔河时，绳子就承受着张力。 ‘tension’ 跟 “tense (紧绷的)” 很像，绳子绷紧时内部就有张力。

Compression: A pushing or squeezing force that shortens a material. A column supporting a ceiling experiences compression. Visualise ‘compress’ as pressing something into a smaller space, like squashing a sponge.

“压力”： 使材料缩短的推挤力。支撑天花板的立柱就承受着压力。想象 “compress” 是一只手把海绵压扁，海绵被压缩就是受到了压力。

Shear: A force that causes parts of a material to slide past one another, like when scissors cut paper. Think of ‘shear’ as the two blades sliding in opposite directions – shearing a sheep removes wool by a slicing action.

“剪切力”： 使材料内部两部分发生相对滑移的力。就像剪刀剪纸，刀刃反向滑过，产生剪切。联想 ‘shear (剪羊毛)’，剪刀咔嚓一剪就是剪切作用。

Torque: A twisting force that causes rotation. When you use a spanner to turn a bolt, you apply torque. Think of ‘torque’ as “turn” with a twist, and the unit is Newton-metre (N·m).

“扭矩”： 引起转动的扭转力。用扳手拧螺栓时，施加的就是扭矩。把 ‘torque’ 联想到 “turn (转动)”，它的单位是牛顿·米 (N·m)。

Friction: A resistive force that opposes motion between two surfaces in contact. Car brakes rely on friction to stop wheels. Remember ‘friction’ from rubbing your hands together – you feel heat because of friction.

“摩擦力”： 阻碍两个接触表面相对运动的力。汽车刹车就是利用摩擦让轮子停转。摩擦生热，搓搓手就能感觉到，这就是 ‘friction’。

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4. Electronics Basics | 电子基础

Voltage (V): The ‘push’ or electrical pressure that drives current around a circuit. Measured in volts. Think of voltage as the height of a waterfall – the higher the drop, the more energy.

“电压 (V)”： 驱动电流在电路中流动的 “推力” 或电压力，单位是伏特。可以把电压想象成瀑布的高度落差：落差越大，水流蕴藏的能量就越大。

Current (I): The flow of electric charge through a conductor, measured in amperes (amps). Picture current as the amount of water flowing past a point per second. More flow = higher current.

“电流 (I)”： 电荷在导体中的流动，单位是安培。想象电流就像水管中每秒钟流过某一点的水量，水量越大，电流就越强。

Resistance (R): Opposition to the flow of current, measured in ohms (Ω). A narrow wire has higher resistance than a thick one. Think of resistance as a narrow section in a pipe that restricts water flow.

“电阻 (R)”： 阻碍电流流动的作用，单位是欧姆 (Ω)。细导线的电阻比粗导线大。可以想象管道中的狭窄处会让水流变慢，电阻在电路中就起到类似限制作用。

Ohm’s Law: The relationship between voltage, current, and resistance, often expressed as:

欧姆定律： 描述电压、电流和电阻之间关系的定律，通常表示为：

V = I × R

Where V is voltage, I is current, and R is resistance. A memory trick: ‘Vicky Is Rare’ – V = I × R.

其中 V 是电压，I 是电流，R 是电阻。记忆口诀：”维克 (V) 艾 (I) 跑 (R)”，即 V = I × R。

Series Circuit: Components connected end-to-end so that the same current flows through each part. If one bulb goes out, the circuit is broken. Think of a series as a single-lane road where all traffic must pass one after another.

“串联电路”： 元件首尾相连，电流只有一条路径，每个元件流过的电流相同。如果一盏灯熄灭，整个回路断开。联想 “串联” 就像单车道公路，所有车必须依次通过。

Parallel Circuit: Components connected on separate branches, allowing current to split. If one branch fails, others continue working. Imagine a parallel circuit as a multi-lane motorway – if one lane is closed, cars use the others.

“并联电路”： 元件连接在独立分支上，电流可以分流，一条支路断开不影响其他支路。好比多车道高速公路，关闭一条车道，车辆仍可从其他车道通过。

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5. Tools and Equipment | 工具与设备

Hacksaw: A fine-toothed saw used for cutting metal and plastic. Its C-shaped frame holds a replaceable blade. Remember ‘hack’ suggests cutting through tough stuff, and ‘saw’ speaks for itself.

“钢锯”： 用来锯切金属和塑料的细齿锯，弓形架上装有可更换锯条。 ‘hack’ 有 “劈砍” 之意，加 ‘saw’ 就是专门对付硬材料的锯子。

File: A hardened steel tool with rows of tiny teeth, used to smooth or shape metal or wood. A smooth file gives a fine finish. Think of filing your nails – the same principle on a larger scale.

“锉刀”： 表面有细密齿纹的淬火钢工具，用来打磨、修整金属或木材。细齿锉刀能产生光滑表面。联想日常用指甲锉修指甲的样子，放大版就是工程锉刀。

Spanner: A tool for gripping and turning nuts and bolts. An open-ended spanner has a U-shaped jaw. Memory aid: a spanner ‘spans’ across the nut to turn it.

“扳手”： 用来夹持和旋转螺母或螺栓的工具。开口扳手有 U 形钳口。把 ‘spanner’ 拆成 “span (跨越)”，扳手正好跨在螺母上转动。

Screwdriver: A tool that turns screws. The tip can be flat, cross-shaped (Phillips) or star-shaped. Think ‘screw’ plus ‘driver’ – it literally drives screws into place.

“螺丝刀”： 用于旋紧或松开螺丝的工具，刀头有一字、十字 (菲利普) 或星形。 ‘screwdriver’ 非常直白：驱动螺丝。

Soldering Iron: An electrically heated tool that melts solder to join electronic components. The hot tip looks like a miniature iron for clothes. Imagine a tiny iron that ‘glues’ wires together with melted metal.

“电烙铁”： 电加热工具，熔化焊锡以连接电子元件。其热端看起来像一支迷你熨斗。想象小熨斗用熔化的金属把线 “粘” 在一起，方便记忆。

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6. Engineering Drawing Symbols | 工程制图符号

Dimension: A measurement on a drawing showing the size or distance of a feature. Dimension lines have arrows at each end. Recall ‘di–’ meaning two, and ‘mension’ related to measure – a dimension gives two points of measurement.

“尺寸标注”： 图纸上表示零件大小或距离的度量，尺寸线两端带有箭头。 ‘dimension’ 可拆成 “di-(二)” 与 “measure”，它标出了两个端点之间的测量长度。

Scale: The ratio between the drawing size and the real object’s size. A 1:5 scale means the drawing is five times smaller. Think of a model car – if the scale is 1:50, the model is one-fiftieth of the real car.

“比例”： 图样尺寸与实物尺寸的比值。1:5 的比例意味着图样比实物小 5 倍。就想象一个 1:50 的汽车模型，模型尺寸只是真车的五十分之一。

Orthographic Projection: A method of drawing an object using several 2D views, usually front, top, and side. It shows exact shape and size. The word ‘ortho’ means straight, and ‘graphic’ means drawing – straight-on views.

“正投影”： 用多个二维视图表示物体的方法，常见的有前视图、俯视图和侧视图，能准确表达形状与尺寸。 ‘ortho’ 有 “正直” 之意，即从正对面观察绘图。

Isometric Drawing: A 3D drawing where all three axes are equally foreshortened and set at 30° angles. It gives a pictorial view. ‘Iso’ means equal, ‘metric’ means measure – equal measures help create the 3D effect.

“等轴测图”： 一种三维图，三条坐标轴按 30° 夹角绘制，成比例缩短。 ‘iso’ 意为 “相等”， ‘metric’ 意为 “测量”，等角测量画出立体感。

Hatching: Closely spaced parallel lines used on section views to show that a material has been cut. Different patterns can indicate different materials. Think of cross-hatching like the shading in a comic book to suggest depth.

“剖面线”： 在剖面图上用密集的平行线表示被切割的材料区域，不同图案可代表不同材料。像漫画中用影线表现明暗一样，工程图上用它来显示内部结构。

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7. Safety Terminology | 安全术语

PPE (Personal Protective Equipment): Equipment worn to protect against health and safety risks, e.g. goggles, gloves, and hard hats. Remember P-P-E as “Protect People Everywhere” or “Put Protection on Everyone”.

“个人防护装备”： 用于保护人员免受健康安全隐患的设备，如护目镜、手套和安全帽。把 P-P-E 记成 “保护每一个人” 的英文缩写，提醒你进车间就要穿戴齐全。

Risk Assessment: A process of identifying hazards, evaluating risks, and deciding on control measures before starting a task. Think: “Spot the hazard, stop the accident.”

“风险评估”： 在开始工作前，识别危险源、评价风险并制定控制措施的过程。可以记住这个口诀：”发现隐患，杜绝事故。”

Hazard: Anything with the potential to cause harm, e.g. a sharp blade or hot surface. A hazard is a source of danger. ‘Hazard’ sounds like ‘has hard’ – something that ‘has hard’ consequences if ignored.

“危险源”： 任何可能造成伤害的事物，比如锋利的刀片或高温表面。 ‘hazard’ 听上去像 “has hard”，如果不管不顾，就会带来严重后果。

Guard: A protective barrier that prevents accidental contact with dangerous parts of a machine. Think of a guard as a shield, like a knight’s armour defending the operator.

“防护罩”： 防止意外接触机器危险部位的屏障。把 ‘guard’ 想象成一个忠诚的卫士，就像骑士的铠甲，始终挡在操作者和危险之间。

Emergency Stop: A red, mushroom-shaped button that instantly cuts power to machinery when pressed. It is often labelled ‘E-Stop’. Visualise the big red button you can hit with a slap in a panic – ‘Emergency’ means immediate action.

“急停按钮”： 一个红色蘑菇头按钮，按下后可立即切断设备电源。记住 ‘E-Stop’，紧急状况下猛拍它，机器就会立刻停止，就像电影里的紧急开关。

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8. Measurement and Precision | 测量与精度

Tolerance: The allowable variation from a specified dimension. A part with length 50mm ± 0.5mm can be between 49.5mm and 50.5mm. Think of ‘tolerance’ as “how much the size is allowed to be ‘tolerant’ or flexible.”

“公差”： 允许尺寸偏离规定值的范围。若一个零件标注为 50mm ± 0.5mm，实际尺寸可在 49.5mm 到 50.5mm 之间。联想 “宽容度”：尺寸可以 “容忍” 多大误差，就是公差。

Accuracy: How close a measurement is to the true value. A dart hitting the bullseye shows high accuracy. ‘Accurate’ means ‘on target’ – no major errors.

“准确度”： 测量值与真值的接近程度。飞镖正中靶心就说明准确度高。 ‘accurate’ 意思是 “准确无误”，偏差极小。

Precision: How consistently repeated measurements give the same result, regardless of accuracy. Darts grouped tightly together, even if not on the bullseye, demonstrate precision. Memory: ‘Precision’ sounds like ‘repeat-cision’ – consistent repetition.

“精密度”： 多次重复测量所得结果的一致性，即使不一定准确。飞镖虽未中靶心，但集中在一个小区域内，说明精密度

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