📚 Year 9 WJEC Engineering: Vocabulary & Terminology Quick Memorization Guide | 九年级 WJEC 工程：词汇术语速记指南
Mastering engineering vocabulary is the first step to thinking like an engineer. In this guide, we break down essential terms from the Year 9 WJEC Engineering curriculum into clear, bilingual explanations with memory hooks to help you recall them quickly in class, homework, and assessments.
掌握工程词汇是像工程师一样思考的第一步。本指南将九年级 WJEC 工程课程中的核心术语拆解成清晰的双语解释，并配以记忆钩子，帮助你在课堂、作业和考试中快速回忆。
1. Materials and Properties | 材料与性能
Let us begin with the language engineers use to describe how materials behave. These terms help you select the right material for a product and explain why it works.
我们先从工程师用来描述材料行为的语言开始。这些术语能帮助你为产品选择合适的材料，并解释其工作原理。
Hardness: The ability of a material to resist scratches, dents, or indentation. Think of a diamond scratching glass — the diamond is harder.
硬度：材料抵抗刮擦、凹痕或压入的能力。想象钻石划玻璃——钻石更硬。
Toughness: The capacity of a material to absorb energy and deform without breaking, often tested by impact. Rubber is tough because it can stretch and bounce back without snapping.
韧性：材料吸收能量并变形而不断裂的能力，通常通过冲击测试。橡胶具有韧性，因为它能被拉伸并弹回而不断裂。
Elasticity: The property that allows a material to return to its original shape after being stretched or compressed. A spring shows high elasticity.
弹性：材料被拉伸或压缩后能恢复原始形状的特性。弹簧表现出高弹性。
Malleability: How easily a material can be hammered or rolled into thin sheets without cracking. Gold is extremely malleable, which is why it can be beaten into gold leaf.
延展性：材料能被锤打或轧制成薄片而不破裂的容易程度。黄金极具延展性，因此能被捶打成金箔。
Memory trick for the four properties: pronounce 'HTEM' as 'hot tem' — Hardness, Toughness, Elasticity, Malleability. Imagine a hot metal sheet being tested.
四种特性的记忆诀窍：把 'HTEM' 读作 'hot tem'——硬度、韧性、弹性、延展性。想象一张热金属片正在被测试。
2. Common Engineering Materials | 常见工程材料
In the workshop you will meet a wide range of materials. Knowing their names and basic families helps you identify them and select wisely.
在车间里你会遇到各种各样的材料。知道它们的名称和基本分类有助于你识别并明智地选择。
Ferrous metal: Metals that contain iron, making them magnetic and prone to rust unless protected. Steel and cast iron are examples. Mnemonic: 'Ferrous' contains 'Fe', the chemical symbol for iron.
黑色金属：含铁的金属，具有磁性，如果不加保护容易生锈。例如钢和铸铁。助记：'Ferrous' 中含有 'Fe'，铁的化学符号。
Non-ferrous metal: Metals without iron content, such as aluminium, copper, and brass. They do not rust and are often more corrosion-resistant.
有色金属：不含铁的金属，如铝、铜和黄铜。它们不会生锈，通常更耐腐蚀。
Thermoplastic d, and can be remoulded many times. Acrylic and polythene are common thermoplastics. Think 'thermal + plastic = heat remouldable'.
热塑性塑料：加热变软、冷却变硬，并能多次重塑的塑料。亚克力和聚乙烯是常见的热塑性塑料。想想 'thermal + plastic = 热重塑'。
Thermosetting plastic: A plastic that sets permanently once heated and moulded; it cannot be re-melted. Urea formaldehyde (used in electrical fittings) is one example. Memory: 'thermo-set' — once set, it stays set.
热固性塑料：一旦加热成型就永久固化、不能再次熔化的塑料。脲醛树脂（用于电气配件）就是一个例子。记忆：'thermo-set'——一旦凝固，永远定型。
3. Basic Tools and Equipment | 基本工具与设备
Every engineer must name the tools correctly. Misnaming a tool can lead to confusion and even safety risks in a busy workshop.
每位工程师都必须正确说出工具的名称。叫错工具名称会造成混淆，甚至在繁忙的车间里引发安全风险。
Engineer's vice: A heavy-duty clamp fixed to a workbench, used to hold workpieces firmly while cutting, filing, or drilling. The jaws are often replaceable and hardened.
台虎钳：固定在工作台上的重型夹具，用于在切割、锉削或钻孔时牢固夹持工件。钳口通常可更换且经过硬化处理。
Scriber: A sharp, hard-pointed tool for marking lines on metal surfaces. It works like a pencil for metal, and the scratch line is more precise than chalk.
划线针：一种尖端坚硬锋利的工具，用于在金属表面刻划标记线。它就像金属用的铅笔，划出的线比粉笔更精确。
Hacksaw: A fine-toothed saw designed for cutting metal, plastic, and tubing. The blade is held under tension in a frame. Remember: 'hack' suggests cutting through tough stuff.
钢锯：一种设计用于切割金属、塑料和管材的细齿锯。锯条在框架内绷紧。记住：'hack' 暗示切割坚硬材料。
Centre punch: A tool used to make a small indentation in a workpiece to guide a drill bit and prevent it from wandering. The punch has a conical point and is struck with a hammer.
中心冲：用于在工件上打出小凹坑的工具，以引导钻头并防止其偏移。冲子有锥形尖端，用锤子敲击。
Memory chain: 'Vice holds, Scriber marks, Hacksaw cuts, Centre punch guides.' Repeat aloud while handling them in your mind.
记忆链条：'虎钳夹持，划线针标记，钢锯切割，中心冲引导。' 一边在脑中操作一边大声重复。
4. Manufacturing Processes | 制造工艺
Engineers transform raw materials into products using specific processes. Learn these verbs and nouns to describe exactly what is happening in the workshop.
工程师使用特定的工艺将原材料转化为产品。学习这些动词和名词，精确描述车间里发生的事情。
Casting: Pouring molten metal or plastic into a mould and letting it solidify to form a shape. The mould is often made of sand or metal. Think of pouring jelly into a mould — that's casting.
铸造：将熔融金属或塑料浇入模具并让其凝固成型。模具通常由砂或金属制成。想象把果冻倒入模具——那就是铸造。
Forging: Shaping metal using compressive forces, often by hammering or pressing, usually while the metal is hot. Blacksmiths forge iron. The term 'forge ahead' means to shape the future, like shaping metal.
锻造：用压缩力（通常是锤击或压制）使金属成形，常在金属炽热时进行。铁匠锻造铁器。'forge ahead' 意为开拓未来，就像塑造金属。
Turning: A machining process where a cutting tool removes material from a rotating workpiece to create cylindrical parts, performed on a lathe. The name comes from the rotation of the work — it turns.
车削：一种加工过程，切削刀具从旋转的工件上去除材料以制造圆柱形零件，在车床上进行。名字源于工件的旋转——它转动。
Welding: Joining two metal parts by melting the edges and adding a filler material to form a strong bond. Welding uses high heat or electricity. Mnemonic: 'Weld' sounds like 'well done' — two pieces become one strong unit.
焊接：通过熔化边缘并添加填充材料将两个金属零件连接起来，形成牢固的结合。焊接使用高温或电力。助记：'Weld' 听起来像 'well done'——两块变一块牢固整体。
5. Measuring and Marking Out | 测量与划线
Precision starts with accurate measurements. Using the correct terms for measuring instruments and layout steps ensures your project meets the specification.
精度始于准确测量。使用正确的测量仪器和划线步骤术语，确保你的项目符合规格。
Vernier caliper: A precise measuring instrument that can read internal, external, and depth dimensions to 0.1 mm or better. It has a main scale and a sliding vernier scale. Think 'very near caliper' — it gets you very near the true value.
游标卡尺：一种精密测量仪器，可读取内径、外径和深度尺寸，精度达 0.1 毫米或更高。它有主尺和滑动游标尺。想想 'very near caliper'——它让你非常接近真实值。
Micrometer: An even more precise instrument measuring to 0.01 mm, using a calibrated screw. It works like a highly accurate clamp. 'Micro' means very small — it measures tiny differences.
千分尺：一种更精密的仪器，使用校准螺杆测量至 0.01 毫米。它像一个高精度夹具。'Micro' 意味着非常小——它测量微小的差异。
Engineer's square: A precision L-shaped tool used to check right angles and to mark lines perpendicular to an edge. An engineer's square is not for rough work; even a tiny error can ruin a fit.
工程师直角尺：一种精密的 L 形工具，用于检查直角并划出垂直于边缘的线。工程直角尺不能用于粗活；即使极小的误差也会破坏配合。
Datum edge: A reference surface or edge from which all measurements are taken. It is the starting point. Imagine it as the 'zero' of your workpiece. 'Datum' is Latin for 'given' — a given starting line.
基准边：所有测量都参照的一个参考面或边。它是起点。想象它是工件的 '零'。'Datum' 在拉丁语中是 '给定的'——一条给定的起始线。
6. Mechanical Fasteners and Joints | 机械紧固件与连接
Holding parts together reliably is central to engineering. This vocabulary covers common fasteners and the joints they create.
可靠地将零件连接在一起是工程的核心。这些词汇涵盖了常见的紧固件及其形成的接头。
Nut and bolt: A bolt is a threaded pin with a head; a nut is a threaded ring that tightens onto the bolt to clamp parts together. A spanner is used on both. Picture a lightning bolt going through a nut — tight!
螺母和螺栓：螺栓是有头的螺纹销；螺母是拧到螺栓上夹紧零件的螺纹环。用扳手操作。想象一道闪电（bolt）穿过坚果（nut）——紧！
Rivet: A permanent mechanical fastener with a head on one end; the other end is deformed with a hammer or rivet gun to hold materials together. Used in aircraft and bridges. Think: 'riveting' means gripping your attention — a rivet grips materials.
铆钉：一种永久的机械紧固件，一端有头；另一端用锤子或铆钉枪变形以固定材料。用于飞机和桥梁。想想：'riveting' 意为引人入胜——铆钉牢牢抓住材料。
Dowelled joint: A joint using small wooden or metal pins (dowels) inserted into matching holes to align and strengthen the connection. It is common in flat-pack furniture. Memory: 'dowel' rhymes with 'towel' — a towel hangs on a pin, and a dowel pins parts together.
销接接头：使用小木销或金属销钉（dowels）插入匹配孔中对齐并加强连接的接头。常见于平板包装家具。记忆：'dowel' 与 'towel' 押韵——毛巾挂在钉子上，销钉将部件钉在一起。
Soldering: Joining metal pieces with a filler metal (solder) that melts at a lower temperature than the workpieces, often used in electronics. Do not confuse with welding — soldering is softer and performed at lower heat. Mnemonic: 'Solder' contains 'sol' like 'solid' but it melts first.
软钎焊：用熔化的填充金属（焊料）连接金属件，焊料熔化温度低于工件，常用于电子行业。不要与焊接混淆——软钎焊更柔和，温度更低。助记：'Solder' 含有 'sol'，像 'solid' 但先熔化。
7. Health and Safety in the Workshop | 车间健康与安全
Safety vocabulary is not optional — it is mandatory. Use these terms to understand rules, signs, and emergency procedures in any engineering environment.
安全词汇不是可选项——是强制要求。使用这些术语来理解任何工程环境中的规则、标志和应急程序。
PPE (Personal Protective Equipment): Equipment worn to minimise exposure to hazards. Includes safety goggles, ear defenders, steel-toe boots, and overalls. The first 'P' is personal — it is your responsibility to wear it.
个人防护装备（PPE）：用于最大限度减少危害暴露的装备。包括护目镜、耳罩、钢头靴和工作服。第一个 'P' 是个人的——穿戴它是你的责任。
Risk assessment: A careful examination of what could cause harm during an activity, so you can put measures in place to control the risk. It follows five steps: identify, decide, act, record, review. Mnemonic: 'IDARR' — Identify Danger And Reduce Risk.
风险评估：对活动中可能造成伤害的因素进行仔细检查，以便采取措施控制风险。它遵循五个步骤：识别、判断、行动、记录、审查。助记：'IDARR'——识别危险并降低风险。
Guarding: A physical barrier fitted to a machine to prevent contact with moving parts or flying debris. Never remove a guard. Think: a goalkeeper guards the goal; a machine guard guards your fingers.
防护罩：安装在机器上的物理屏障，防止接触运动部件或飞溅碎屑。永远不要拆除防护罩。想象：守门员守卫球门；机器防护罩守护你的手指。
Emergency stop button: A large red button (often red with a yellow background) that immediately cuts power to a machine when pressed. It is a fail-safe device. The colour red signals danger and immediate stop.
紧急停止按钮：一个大的红色按钮（通常红色带黄底），按下后立即切断机器电源。是一种故障安全装置。红色表示危险和立即停止。
8. Engineering Drawing and Symbols | 工程图纸与符号
Drawings are the language engineers use to communicate design intent globally. Learn the basics of orthographic projection, dimensioning, and common British Standard symbols.
图纸是工程师用来在全球传达设计意图的语言。学习正投影、尺寸标注和常见英国标准符号的基础知识。
Orthographic projection: A method of representing a 3D object in two dimensions using front, side, and plan (top) views. No perspective is used — all lines are drawn to scale. 'Ortho' means straight, 'graph' means drawing — straight drawing views.
正投影：一种通过前视图、侧视图和俯视图（平面图）以二维表示三维物体的方法。不使用透视图——所有线条均按比例绘制。'Ortho' 意为直的，'graph' 意为图画——直视绘图。
Dimension line: A thin line with arrowheads or tick marks at each end, showing the measurement value. The dimension is placed above the line. Think of it as a ruler printed on the paper.
尺寸线：两端带箭头或斜线的细线，显示测量数值。尺寸数字置于线上方。把它想象成打印在纸上的尺子。
Surface finish symbol ting how smooth a surface should be after machining. The lower the number in micrometres (µm), the smoother the finish. Recall 'smoother surface = smaller number'.
表面粗糙度符号：一个看起来像对勾 (√) 或带数字的根号符号，指示加工后表面应有多光滑。微米 (µm) 数值越小，表面越光滑。牢记：'更光滑表面 = 更小数字'。
Third angle projection: The standard projection system used in the UK and most of Europe, where the views are arranged as if the object is placed inside a glass box. The plan view appears above the front view. Opposite to first angle projection. Memory: 'UK uses Third — think of the three lions on the football badge.'
第三角投影：英国和欧洲大部分地区使用的标准投影系统，视图排列如同将物体放在玻璃盒内。俯视图位于前视图上方。与第一角投影相反。记忆：'英国用第三角——想想足球徽章上的三只狮子。'
9. Electronics and Circuits Basics | 电子与电路基础
Even in mechanical engineering, basic electronics literacy is required. These terms will help you understand simple control, sensing, and actuation circuits.
即使在机械工程中，也需要基本的电子素养。这些术语能帮助你理解简单的控制、传感和执行电路。
Voltage (V): The electrical pressure that pushes current through a circuit, measured in volts. It is like the pressure of water in a pipe. 'Voltage' sounds like 'voltage, push charge'.
电压 (V)：推动电流通过电路的电压力，以伏特为单位。就像水管中的水压。'Voltage' 听起来像 '电压，推动电荷'。
Current (I): The flow of electric charge, measured in amperes (amps). It is the rate of flow. Think of current as the amount of water flowing per second. 'I' reminds you of 'intensity of flow'.
电流 (I)：电荷的流动，以安培（安）为单位。即流动速率。把电流想象成每秒流过的水量。'I' 让你想起 '流动的强度 (intensity)'。
Resistance (R): The opposition to current flow, measured in ohms (Ω). Resistors are components that control current. A narrow wire has more resistance than a thick one. Mnemonic: a resistor resists — it pushes back.
电阻 (R)：对电流流动的阻碍，以欧姆 (Ω) 为单位。电阻器是控制电流的元件。细电线比粗电线的电阻更大。助记：电阻器抵抗 (resists)——它往回推。
LED (Light Emitting Diode): A semiconductor device that emits light when current flows through it in the correct direction. It is efficient and long-lasting. Remember the long leg is positive (Anode). 'LED' rhymes with 'lead me to the light'.
LED（发光二极管）：一种半导体器件，当电流沿正确方向流过时会发光。高效且寿命长。记住长腿是正极（阳极）。'LED' 与 'lead me to the light' 押韵。
10. Forces and Structures | 力与结构
Structures surround us, and they withstand forces. Use these terms to analyse why things stay up and how they can fail.
结构围绕在我们身边，它们承受着力。用这些术语来分析物体为何能保持直立以及如何失效。
Tension: A pulling force that tries to stretch a material. A rope in a tug-of-war is in tension. 'Tension' sounds like 'tensile', as in tensile strength.
拉伸力：一种试图将材料拉长的拉力。拔河中的绳子承受拉伸力。'Tension' 听起来像 'tensile'（拉伸的）。
Compression: A pushing force that tries to shorten or crush a material. The legs of a chair experience compression. Think of a spring being compressed — pressed together.
压缩力：一种试图缩短或压碎材料的推力。椅子腿承受压缩力。想象弹簧被压缩——压在一起。
Bending: A combination of tension on one side and compression on the other when a force is applied sideways. A diving board bends. The top surface is in compression, the bottom in tension. Mnemonic: 'Bend combines both ends — tension and compression.'
弯曲：当从侧面施力时，一侧受拉、另一侧受压的组合状态。跳水板会弯曲。上表面受压，下表面受拉。助记：'弯曲结合两端——拉伸和压缩。'
Shear: A force that causes parts of a material to slide past each other in opposite directions, like scissors cutting paper. The plane of failure is called the shear plane. 'Shear' sounds like 'shears' — the tool used for shearing.
剪切：一种使材料各部分沿相反方向相互滑动的力，就像剪刀剪纸。破坏面称为剪切面。'Shear' 听起来像 'shears'（剪刀）。
Strut: A structural member designed to resist compression, often found in frameworks and bridges. A tie (opposite) resists tension. 'Strut' suggests strength, like strutting confidently. A strut is strong against pushing.
支柱：一种设计用来抵抗压缩力的结构构件，常见于框架和桥梁中。拉杆（相对）抵抗拉伸力。'Strut' 暗示力量，像自信地昂首阔步。支柱对推力强劲。
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